Academic literature on the topic 'Acacia mearnsii'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Acacia mearnsii.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Acacia mearnsii"
1
Goets, Stefan A., Tineke Kraaij, and Keith M. Little. "Seed bank and growth comparisons of native (Virgilia divaricata) and invasive alien (Acacia mearnsii and A. melanoxylon) plants: implications for conservation." PeerJ 6 (August 21, 2018): e5466. http://dx.doi.org/10.7717/peerj.5466.
Full textAbstract:
Background Invasive alien plants with long-lived dormant seed banks and fast growth rates are difficult to manage. Acacia mearnsii and Acacia melanoxylon are two such invaders in the southern Cape of South Africa which occasionally co-occur with a native, ecologically analogous species, Virgilia divaricata. We compared the performance of these three species to determine potential for the native species to be used in management of the invasives. Methods We compared the study species in terms of (i) soil seed bank densities, their vertical distribution, and the viability of seeds underneath the canopies of mature trees; (ii) seedling growth from planted seeds over a period of three months; and (iii) growth rates of saplings over a period of 10 months in stands that have naturally regenerated in the field (these stands were dominated by A. mearnsii) and where saplings have been exposed to varying levels of competition from surrounding saplings. Results Seed bank densities differed significantly among species but not among soil depth classes. Acacia mearnsii had the highest seed bank densities (mean of 7,596 seeds m−2), followed by V. divaricata (938 seeds m−2) and A. melanoxylon (274 seeds m−2). Seed viability was high (87–91%) in all three study species and did not differ significantly among species or soil depth classes. As seedlings, V. divaricata significantly outgrew A. mearnsii in terms of height, root and shoot dry mass, and root:shoot ratio. Relative growth (the relationship between growth in height and initial height) was negative in the seedlings of both species. Trends during the sapling stage were opposite to those during the seedling stage; A. mearnsii (but not A. melanoxylon) saplings significantly outgrew V. divaricata saplings in height, while relative growth rates were positive in all species. Sapling growth of all species was furthermore uninfluenced by the collective biomass of surrounding competitors. Discussion Our findings suggest that amongst the measures considered, A. mearnsii’s success as an invader is primarily attributable to its large seed banks, and secondly to its vigorous growth in height as saplings. However, the superior growth performance of V. divaricata seedlings and no apparent negative effect of competition from the acacias on sapling growth show promise for its use in integrated management of the acacias.
2
Viera, Márcio, Mauro Valdir Schumacher, and Edenilson Liberalesso. "Mixed and monospecific stands of eucalyptus and black-wattle: I - fine root length density." Ciência Rural 42, no. 10 (August 21, 2012): 1818–25. http://dx.doi.org/10.1590/s0103-84782012005000074.
Full textAbstract:
Fine root length density (FRLD) was evaluated in mixed and monospecific stands of Eucalyptus grandis x E. urophylla and Acacia mearnsii in Southern Brazil. FRLD (≤2,0mm) at 8 and 18 months after planting in the treatments: 100E (100% of eucalyptus); 100A (100% of Acacia mearnsii); 50E:50A (50% of eucalyptus + 50% of Acacia mearnsii). The findings demonstrated that the FRLD at 8 months of age have the same distribution, in the two different species, in the distribution of the different soil layers, reaching the maximum projection of 125cm from the tree trunk. For the age of 18 months after planting, it was verified that the FRLD in the monospecific stand of Acacia mearnsii was higher than in the monoculture and mixed stand of Eucalyptus grandis x E. urophylla. Therefore, no interaction, neither positive nor negative, between the root systems of Eucalyptus grandis x E. urophylla and Acacia mearnsii during the 18 months after planting was found. The higher FRLD is found at the soil layers surface, next to the tree trunk and in the planting line, followed by the diagonal and planting rows. The initial growth in length of the root system of Acacia mearnsii is more dynamic with higher density than the eucalyptus, but without interfering directly in the global growth of fine roots in mixed stands.
3
Bauhus, J., P. K. Khanna, and N. Menden. "Aboveground and belowground interactions in mixed plantations of Eucalyptus globulus and Acacia mearnsii." Canadian Journal of Forest Research 30, no. 12 (December 1, 2000): 1886–94. http://dx.doi.org/10.1139/x00-141.
Full textAbstract:
This study investigated whether increased productivity in mixed plantations of Eucalyptus globulus Labill. and Acacia mearnsii de Wild when compared with monocultures could be explained by niche separation of the fine-root systems. For this purpose fine-root architecture, nutrient concentration, and fine-root distribution were examined in two horizons (0-15 and 15-30 cm) of mixed and pure stands. Investigations were carried out in 6.5-year-old plantations consisting of 100% eucalypts, 75% eucalypts + 25% acacia, 50% eucalypts + 50% acacia, 25% eucalypts + 75% acacia, and 100% acacia. Aboveground the two species interacted synergistically. Stem volume and tree height was highest in the 50:50 mixtures. For acacias, intraspecific competition was stronger than interspecific competition with eucalypts. Fine-root biomass and length density were similar for all species combinations, and there was no synergistic effect. The vertical distribution of fine roots and fine-root architecture were similar for acacias and eucalypts. This indicated that soil exploitation strategies may be similar, which can result in strong competition for soil resources. Fine-root nitrogen concentrations of eucalypts were highest in the 50:50 mixture. Improved productivity of mixtures appears to be a result of both canopy stratification and improved N nutrition of eucalypts through N fixation by acacias.
4
Kannegiesser Schuh, Ute. "Apuntes sobre algunas acacias australianas. 1. Acacia mearnsii De Willd." Ciencia & Investigación Forestal 4, no. 2 (July 6, 1990): 198–212. http://dx.doi.org/10.52904/0718-4646.1990.141.
Full textAbstract:
Acacia mearnsii pertenece a la familia Mimosaceae y está estrechamente relacionada con A. decurrens, de la cual incluso durante una época fue considerada una variedad y con A. dealbata. Esta sin embargo presneta folíolos más largos, follaje plateado y legumbres más toscas.
5
Uushona, T., O. C. Chikwanha, T. Tayengwa, C. L. F. Katiyatiya, P. E. Strydom, and C. Mapiye. "Nutraceutical and preservative potential of Acacia mearnsii and Acacia dealbata leaves for ruminant production and product quality enhancement." Journal of Agricultural Science 159, no. 9-10 (November 2021): 743–56. http://dx.doi.org/10.1017/s0021859621001015.
Full textAbstract:
Abstract Seasonality and species are key aspects of the abiotic and biotic environment, respectively, that influence nutrient, phytochemical and antioxidant profiles of invasive alien plants leaf-meals. The current study investigated the effects of season on nutrient, amino acid, fatty acid, mineral, bioactive polyphenolic composition and antioxidant activity of Acacia mearnsii and A. dealbata leaf-meals. Overall, A. mearnsii leaf-meal harvested in the hot-dry-season had greater crude protein, ether extract, neutral detergent soluble fibre, 24 and 48 h in vitro neutral detergent fibre digestibility, macro-mineral contents, individual polyphenols, C18:1n9 and C18:2n6 compared to other leaf-meals. Regardless of the season, A. mearnsii leaf-meals had greater amino acid concentrations than A. dealbata leaf-meals. Hot-dry-season leaf-meals had a greater concentration of total flavonoids than the leaf-meals in the cool-wet-season irrespective of species. Antioxidant potency composite of the Acacia leaf-meals was in the order of A. dealbata × hot-dry-season > A. mearnsii × hot-dry-season > A. mearnsii × cool-wet-season > A. dealbata × cool-wet-season. The findings suggested that A. mearnsii leaf-meal harvested in the hot-dry-season has superior nutritional and polyphenolic profiles, which could support its use as a nutraceutical and preservative for the enhancement of ruminant production and product quality compared to other leaf meals.
6
Bley-Dalouman, H., F. Broust, J. Prevost, and A. Tran. "USE OF VERY HIGH SPATIAL RESOLUTION IMAGERY FOR MAPPING WOOD ENERGY POTENTIAL FROM TROPICAL MANAGED FOREST STANDS, REUNION ISLAND." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2021 (June 28, 2021): 189–94. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2021-189-2021.
Full textAbstract:
Abstract. The development of a sustainable wood energy chain is an essential part of ecological and energy transition in Reunion Island (Indian Ocean), where Acacia mearnsii is the main potential wood energy resource identified to date. In order to assess future wood biomass supply chain strategies, a major first issue is to gain knowledge of the spatial distribution of this species forest stands.In this study, we assessed the potential of very high spatial resolution multispectral imagery for mapping the main forest stands in a study area located the Western Highlands region, where Acacia mearnsii expands alongside Acacia heterophylla, an endemic forest species and Cryptomeria japonica, an exotic forest stand. A reference database including 150 samples of seven classes (Acacia mearnsii (mature and non-mature), Acacia heterophylla (mature and non-mature), Cryptomeria japonica, ‘herbaceous areas’, and ‘bare soils’) was used to classify a Pleiades image acquired in May 2020. Spectral and textural indices were used in an incremental classification procedure using a random classifier.The best results (Kappa = 0.84, global accuracy = 84%) were obtained for the classification using all spectral and textural bands. The resulting map enables analyzing the spatial distribution of the different forest stands.
7
Bauhus, Jürgen, Aaron P. van Winden, and Adrienne B. Nicotra. "Aboveground interactions and productivity in mixed-species plantations of Acacia mearnsii and Eucalyptus globulus." Canadian Journal of Forest Research 34, no. 3 (March 1, 2004): 686–94. http://dx.doi.org/10.1139/x03-243.
Full textAbstract:
This study compared productivity in mixed-species plantations of Eucalyptus globulus ssp. pseudoglobulus (Naudin ex Maiden) Kirkpatr. and Acacia mearnsii de Wild with pure stands of each species and investigated how this might be explained by canopy stratification between species and changes in leaf characteristics of eucalypts. Investigations were carried out at a trial using the replacement series design, which consisted of the following combinations: 100% eucalypts (100%E), 75% eucalypts + 25% acacia (75%E:25%A), 50% eucalypts + 50% acacia (50%E:50%A), 25% eucalypts + 75% acacia (25%E:75%A), and 100% acacia (100%A). At 9.5 years, stem volume and biomass were highest in 50%E:50%A treatments. Canopy stratification occurred in all mixtures, with acacias in the lower and eucalypts in the upper canopy stratum. This and the increasing canopy light interception with increasing proportion of acacia in the mixture indicated that A. mearnsii is substantially more shade tolerant than E. globulus. Midcanopy foliage of E. globulus in the 50%E:50%A mixture had higher foliage nitrogen (N) but lower phosphorus (P) concentrations and lower light-saturated net photosynthesis rates (Amax) than those in the 100%E treatment. In addition, similar relationships between eucalypt crown volume and stem biomass across treatments indicated that eucalypt crowns were not more efficient in mixture. Our study indicates that the productivity gains in these mixtures may be partially attributable to aboveground niche separation between species.
8
Kharivha, Tshililo, Sheunesu Ruwanza, and Gladman Thondhlana. "Effects of Elevated Temperature and High and Low Rainfall on the Germination and Growth of the Invasive Alien Plant Acacia mearnsii." Plants 11, no. 19 (October 7, 2022): 2633. http://dx.doi.org/10.3390/plants11192633.
Full textAbstract:
The impact of climate change on the germination and growth of invasive alien plants varies depending on the plant species and invasion process. We experimentally assessed the responses of the invasive alien plant Acacia mearnsii to future climate change scenarios—namely, elevated temperature as well as high and low rainfall. Acacia mearnsii was grown at an elevated air temperature (+2 °C), high rainfall (6 mm per day), and low rainfall (1.5 mm per day), and its germination and growth performance were measured over five months. We further examined changes in soil nutrients to assess if the above-mentioned climate change scenarios affected soils. Both elevated temperature and high rainfall did not influence A. mearnsii germination and seedling growth. In contrast, we observed reductions in A. mearnsii germination and growth in the low rainfall treatment, an indication that future drought conditions might negatively affect A. mearnsii invasion. We noted that elevated temperature and rainfall resulted in varied effects on soil properties (particularly soil C, N, Ca, and Mg content). We conclude that both elevated temperature and high rainfall may not enhance A. mearnsii invasion through altering germination and growth, but a decrease in A. mearnsii invasiveness is possible under low rainfall conditions.
9
Calegari, Leandro, Pedro Jorge Goes Lopes, Elisabeth De Oliveira, Darci Alberto Gatto, and Diego Martins Stangerlin. "Quantificação de taninos nas cascas de jurema-preta e acácia-negra." Pesquisa Florestal Brasileira 36, no. 85 (March 31, 2016): 61. http://dx.doi.org/10.4336/2016.pfb.36.85.986.
Full textAbstract:
Em função de sua complexidade química, há diversas metodologias de quantificação dos taninos vegetais. Neste sentido, o presente estudo teve como objetivo quantificar as substâncias tânicas e não-tânicas presentes nas cascas de jurema-preta (Mimosa tenuiflora) e de acácia-negra (Acacia mearnsii) por dois métodos distintos. A partir das partículas de casca de ambas as espécies, foram geradas soluções analíticas utilizando um extrator do tipo camisa de vapor, sendo a solução analisada pelos métodos de Stiasny e do pó de pele (não cromado). Para ambas as espécies, os teores de tânicos foram superiores quando analisados pelo método de pó de pele, atingindo 47,8 e 24,1% para A. mearnsii e M. tenuiflora, respectivamente. Pelo método de Stiasny, o teor de taninos condensados foi de 39,0% para A. mearnsii e 15,5% para M. tenuiflora. Apesar dos melhores resultados obtidos para a A. mearnsii, a casca de M. tenuiflora também apresentou grande potencialidade em função da considerável quantidade de tânicos e da disponibilidade da espécie no bioma Caatinga. Tannins quantification in barks of Mimosa tenuiflora and Acacia mearnsiiDue to its chemical complexity, there are several methodologies for vegetable tannins quantification. Thus, this work aims at quantifying both tannin and non-tannin substances present in the barks of Mimosa tenuiflora and Acacia mearnsii by two different methods. From bark particles of both species, analytical solutions were produced by using a steam-jacketed extractor. The solution was analyzed by Stiasny and hide-powder (no chromed) methods. For both species, tannin levels were superior when analyzed by hide-powder method, reaching 47.8% and 24.1% for A. mearnsii and M. tenuiflora, respectively. By Stiasny method, the tannins levels considered were 39.0% for A. mearnsii, and 15.5% for M. tenuiflora. Despite the best results presented by A. mearnsii, the bark of M. tenuiflora also showed great potential due to its considerable amount of tannin and the availability of the species at Caatinga biome.Index terms: Gravimetric method; Stiasny; ALCA extractor
10
Searle, S. D., J. C. Bell, and G. F. Moran. "Genetic diversity in natural populations of Acacia mearnsii." Australian Journal of Botany 48, no. 2 (2000): 279. http://dx.doi.org/10.1071/bt98043.
Full textAbstract:
Twenty-three isozyme loci were used to examine genetic diversity within and between 19 natural populations of Acacia mearnsii De Wild. selected to represent its entire geographic range. Acacia mearnsii was found to have moderate genetic diversity (species level gene diversity HT = 0.201) with the majority (89.2%) of variation occurring within populations. All measures of population diversity were higher in the northern (New South Wales) than the southern (Victoria, South Australia, Tasmania) populations. There was some evidence of differentiation between populations but no strong clustering at a regional level.
Dissertations / Theses on the topic "Acacia mearnsii"
1
Oliveira, Leonardo da Silva. "Aspectos entomológicos em povoamentos homogêneos de Acacia mearnsii de Wild." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/3705.
Full textAbstract:
Conselho Nacional de Desenvolvimento Científico e TecnológicoThe proposed work aimed to investigate the entomological aspects in homogeneous stands of Acacia mearnsii (black wattle). It was considered: insects identification and damage quantification on seeds; treatment effect of seeds and the insecticides application on the aerial part of plants of direct sowing; the survey qualiquantitative by light traps mean; the main species of Coleoptera present in the suppressed trees; the attack characterization of Oncideres impluviata and its influence on wood volume of black wattle. The experiments were carried out in cultivated areas of black wattle situated at the municipality of Butiá and Minas do Leão in the carboniferous region of Rio Grande do Sul during March 2004 to July 2006. It was verified that the Stator limbatus (Coleoptera: Chrysomelidae) caused expressive damage to the black wattle seeds. There was no statistical increase in relation to the use of insecticides to the directly sowing, however black wattle plants submitted to thiamethoxam application on the aerial part showed better development. Among the 11 orders collected by light traps the populations of lepidoptera, coleoptera and hemiptera were quantitatively pointed. Sigara sp. (Hemiptera: Corixidae), Conoderus alfredense (Coleoptera: Elateridae) and Plectris crassa (Coleoptera: Scarabaeidae) were the species more frequents, abundant and constants collected by the light traps. At the qualitative survey made in suppressed trees it was observed 40 species of Coleoptera distributed in ten families, focusing in Curculionidae with twelve representatives, Cerambycidae with ten and Scarabaeidae with nine species. It was verified that O. impluviata attacks the high parts of the tree, independent of age, from the borders into the stand and cuts the branches averaging 14mm of diameter and 1.4 m of length. These branches present high contents of nitrogen and phosphorus in their chemical composition when compared to non-cut branches. The attack of O. impluviata did not reduce the wood volume produced for black wattle trees.
O trabalho proposto teve como objetivo o estudo de aspectos entomológicos em povoamentos homogêneos de Acacia mearnsii (acácia-negra), considerando a identificação de insetos e quantificação de seus danos em sementes; o efeito do tratamento de sementes e a aplicação de inseticidas na parte aérea de plantas de semeadura direta; o levantamento quali-quantitativo, por meio de armadilha luminosa; as principais espécies de Coleoptera presentes em sub-bosque; a caracterização do ataque de Oncideres impluviata e a sua influência no volume de madeira de acácia-negra. Os experimentos foram realizados em áreas de plantio e povoamentos de acácia-negra situados nos municípios de Arroio dos Ratos, Butiá e Minas do Leão, na região carbonífera do Rio Grande do Sul, no período de março de 2004 a julho de 2006. Verificou-se que Stator limbatus (Coleoptera: Chrysomelidae) causa expressivos danos a sementes de acácia-negra. Não houve diferença significativa em relação ao uso de inseticidas para a semeadura direta. Das 11 ordens coletadas por meio de armadilha luminosa, destacam-se quantitativamente as populações de lepidópteros, coleópteros e hemípteros. Sigara sp. (Hemiptera: Corixidae), Conoderus alfredense (Coleoptera: Elateridae) e Plectris crassa (Coleoptera: Scarabaeidae) foram as espécies muito freqüentes, muito abundantes e constantes, coletadas através de armadilha luminosa. No levantamento qualitativo realizado em sub-bosques foram observadas 40 espécies de Coleoptera, distribuídas em dez famílias, com destaque para os Curculionidae com doze representantes, Cerambycidae com dez e Scarabaeidae com nove espécies. Constatou-se que O. impluviata ataca nas partes mais altas da árvore, independente da idade, tanto nas bordas como no interior de povoamentos. O. impluviata anela galhos com diâmetros e comprimentos médios de 1,4 cm e 1,4 m, respectivamente. Estes galhos apresentam maiores teores de nitrogênio e fósforo em sua composição química quando comparados com galhos não-anelados. O ataque de O. impluviata não reduziu o volume de madeira produzido por árvores de acácia-negra.
2
Avila, André Sanches de. "Taninos condensados de acácia negra (Acacia mearnsii) na alimentação de ruminantes." Universidade Estadual do Oeste do Paraná, 2018. http://tede.unioeste.br/handle/tede/4165.
Full textAbstract:
Submitted by Helena Bejio (helena.bejio@unioeste.br) on 2019-03-28T00:41:04Z
No. of bitstreams: 2
Tese André Sanches de Avila versão final.pdf: 1188949 bytes, checksum: c8e87e7ae6a74049292d17bb4a07fe16 (MD5)
license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2019-03-28T00:41:04Z (GMT). No. of bitstreams: 2 Tese André Sanches de Avila versão final.pdf: 1188949 bytes, checksum: c8e87e7ae6a74049292d17bb4a07fe16 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-12-06
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Additives use to modify ruminal fermentation is an alternative to improve animal productivity. Among the most used additives, plants extracts, as the condensed tannins that according to the level and source used, it can bring benefits to ruminant production. It was conducted a study to evaluate the use of condensed tannins and its effects on lactating Holstein cows performance. It was used five cows in a Latin square design 5x5, where the treatments were levels of condensed tannins from Acacia mearnsii (0, 5, 10, 15 and 20 g/kg of DM of total diet), periods consisted in 14 days of adaptation and 6 days for sampling. Condensed tannins use did not influence the dry matter intake, however, it was found a quadratic effect of tannins in the digestibility of dry matter and NDF with maximum values in 12,2 and 11,4 g/kg of tannins in DM respectively. It did not occur major effects on blood parameters and microbial protein synthesis and milk production in kg/day, however, there was a reduction in milk production corrected to fat and energy and in casein contents, being an undesirable effect in animals’ performance. In another study carried out it was evaluated tannin levels to feed cannulated jersey steers. The design was a Latin square 5x5 with five animals and treatments were related to the inclusion levels of Acacia mearnsii (0, 5, 10, 15 and 20 g/kg of DM). The inclusion of tannins did not influence the nutrients digestibility except for CP that decreases linearly. There was a linear reduction in ruminal pH values, that is related to tannins pH. Population of ruminal protozoans and gender evaluation in the rumen were not influenced as well as the ruminal NNH3 nitrogen levels were not influenced by tannins. Inclusion of condensed tannins reduces the proportion of acetic acid and did not influence the ruminal protozoa population, however it reduces the apparent crude protein digestibility.
A utilização de aditivos para modificar a fermentação ruminal é uma alternativa muito utilizada para melhorar a produtividade animal. Entre os aditivos utilizados, estão os extratos de plantas como os taninos condensados que, dependendo do nível e a fonte utilizada, podem trazer benefícios para a produção de ruminantes. Foram realizados dois experimentos para avaliar a utilização de taninos condensados e seus efeitos sobre o desempenho de vacas em lactação e também com bovinos jersey fistulados. No experimento com as vacas em lactação, foram utilizadas cinco vacas da raça holandês em um delineamento quadrado latino 5x5 em que os tratamentos foram níveis de extrato de taninos condensados de Acacia mearnsii (0, 5, 10, 15 e 20 g/kg de MS na dieta total). Os períodos consistiram em 14 dias para adaptação e seis dias para coleta. A utilização dos taninos não influenciou a ingestão de MS, porém apresentou efeito quadrático para a digestibilidade da matéria seca e fibra em detergente neutro, com valores máximos estimados com a inclusão de 12,2 e 11,4 g/kg de MS, respectivamente. Os parâmetros sanguíneos, a síntese de proteína microbiana e a produção de leite em kg/dia não foram influenciados pelos taninos condensados. No entanto, ocorreu redução na produção de leite corrigida para gordura e energia e nos teores de caseína, sendo um efeito indesejável sobre o desempenho dos animais. No segundo estudo, avaliou-se a inclusão de taninos condensados na alimentação de bovinos jersey fistulados. O delineamento experimental utilizado foi um quadrado latino 5x5 com diferentes níveis de inclusão de taninos condensados de Acacia mearnsii em 0, 5, 10, 15 e 20 g/kg da MS das dietas. A inclusão de taninos reduziu linearmente a digestibilidade aparente da proteína, no entanto, não influenciou na digestibilidade dos demais nutrientes. Foi observada redução linear no pH ruminal com a inclusão dos níveis de taninos, efeito que pode estar relacionado ao pH do aditivo. A população total de protozoários ruminais e também dos gêneros avaliados não foram alterados, assim como os teores de amônia ruminal não foram influenciados pelo uso de taninos. A inclusão de TC nas dietas reduz as proporções de ácido acético e não influencia na população de protozoários ruminais, porém reduz a digestibilidade aparente da proteína bruta.
3
Joubert, Carinne. "Rhizobia associated with Australian Acacia species (Acacia mearnsii, Acacia dealbata and Acacia decurrens) in South Africa as determined by Sodium Dodecyl-Sulphate Polyacrylamide Gel Electrophoresis." Pretoria : [S.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-10052005-123519/.
Full text
4
Finger, Anelisa Pedroso. "DIAGRAMAS DE MANEJO DA DENSIDADE PARA POVOAMENTOS DE Acacia mearnsii De Wild." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/8785.
Full textAbstract:
Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorDensity management diagrams (DMD) is a tool used to carry out the prognosis of production in density, basal area and volume in order to establish management strategies for forest planning. The aim was to build a density management diagram for Acacia mearnsii De Wild. Data from 12 cities in the northeastern region of Rio Grande do Sul were used for the DMD construction. Since the Tang model had the best evaluation, it was used to select the maximum population density estimative, thus the density 1x1 was used to construction of the DMD. With the same model, self-thinning graphs and Stand Density Index (SDI) were generated; adopting a standard quadratic mean diameter of 10cm. Density levels were determined proportionally to SDI maximum density in 200 class intervals, with higher 2400 and lower 1400 SDI. The DMD were produced with an average diameter and density control, and volume and green rind bark weight per hectare. A second DMD model was developed in order to insert a site production control through the dominant height of the stand. These DMD models allowed estimating the volume and green rind bark with great precision, from the control of diameter, density and dominant height.
O Diagrama de Manejo da Densidade (DMD) é uma ferramenta utilizada para realizar a prognose da produção em densidade, área basal e volume a fim de estabelecer estratégias de manejo para o planejamento florestal. O objetivo do presente foi construir um diagrama de manejo da densidade para Acacia mearnsii De Wild., com dados dendrométricos provenientes de 12 municípios da região nordeste do Rio Grande do Sul. A máxima densidade populacional foi estimada pelo modelo de Tang, ajustado com dados de parcelas em espaçamento 1x1m. Com este modelo foram gerados os gráficos de autodesbaste e Índices de Densidade de Povoamento (IDP) para um diâmetro padrão de 10cm. Os níveis de densidade foram determinados, proporcionalmente, a partir da máxima densidade, por índice de densidade de povoamento (IDP), em intervalos de classe de 200, com IDP máximo 2400 e mínimo 1400. Os DMDs foram elaborados com controle de diâmetro médio e densidade populacional, e como variável de resposta o volume por hectare e o peso de casca verde por hectare. Um segundo modelo de DMD foi elaborado com o objetivo de inserir um controle produtivo dos sítios, através da altura dominante do povoamento. Estes modelos de DMD permitiram estimar o volume e peso de casca verde com ótima precisão, a partir do controle do desenvolvimento do diâmetro, densidade e altura dominante.
5
Kleinpaul, Isabel Sandra. "PLANTIO MISTO DE Eucalyptus urograndis E Acacia mearnsii EM UM SISTEMA AGROFLORESTAL." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/8637.
Full textAbstract:
This study had as objective to evaluate a mixed stand of Eucalyptus urograndis and Acacia mearnsii in an agroforestry system with corn (Zea mays L.). The study was
conducted in Bagé county, in a partnership with VCP (Votorantim Celulose e Papel) company. The study was installed in December 2006, with five different treatments
(T1- 100% eucalyptus; T2- 100% black-wattle; T3- 50% eucalyptus+ 50% blackwattle; T4- 75% eucalyptus + 25% black-wattle and T5- 25% eucalyptus + 75% black-wattle), with 4 m x 1,5 m planting space. Three lines of corn were planted, between the eucalyptus and/or black-wattle lines. 10 months after the installation, a inventory was done, where all the stem diameters and the total height were
measures, for further volume determination. At the same time the biomasses from forest species were quantified, they were separated in fractions (leave, branch and
stem). Corn biomass was collected in the end of the cycle and separated in fractions (leave, straw, grain, corn cob and stem). Homogeneous eucalyptus and black-wattle
stands did not differ in height and stem diameter related to mixed stand. Black-wattle
cylindrical volume, both in homogeneous and mixed stand was higher for eucalyptus,
because showed a highest initial growth. In mixed stands, the treatment T5
(25E:75A) showed a highest biomass accumulation, being 35,1% in the leaves,
25,8% in branches and 39,1% in stem. Biomass accumulation for each fraction, had
the following order, for T1 and T3: stem>branch>leaf and, for T2, T3, T4 and T5:
stem>leaf>branch. The highest levels of nutrients in trees biomass, are in the leaves,
followed by branches and stem. Black-wattle in homogeneous stands, showed
highest nutrients accumulation, because it had the highest amount of total biomass.
The highest percentage of corn grains was observed in T4 (75E:25A), with 38,4%
from the total biomass of this treatment. Grains showed the highest amounts for N, P,
Mg, B and Zn. In treatment T4 (75E:25A), corn exported more nutrients, because
showed the highest grain production.O objetivo deste estudo foi avaliar um plantio misto de Eucalyptus urograndis e Acacia mearnsii em sistema agroflorestal com milho (Zea mays L.). O estudo foi realizado no município de Bagé, em parceria com a VCP (Votorantim Celulose e Papel). A implantação da pesquisa foi em dezembro de 2006, com cinco tratamentos diferentes (T1- 100% eucalipto; T2- 100% acácia-negra; T3- 50% eucalipto + 50% acácia-negra; T4- 75% eucalipto + 25% acácia-negra e T5- 25% eucalipto + 75% acácia-negra), com espaçamento de 4 m x 1,5 m. Foram plantadas 3 linhas de milho, entre as fileiras de eucalipto e/ou acácia-negra. Aos 10 meses de plantio, foi realizado um inventário na área, sendo medidos, o diâmetro do colo e a altura total, para posterior determinação do volume. Na mesma ocasião foi quantificada a biomassa das espécies florestais, que foram separadas por frações (folha, galho e tronco). A biomassa do milho foi coletada no final do ciclo e separada por frações (folha, palha, grão, sabugo e colmo). O plantio homogêneo de eucalipto e acácianegra, não diferiu em altura e diâmetro do colo em relação ao plantio misto. O volume cilíndrico da acácia-negra, tanto em plantio homogêneo como misto, foi maior que para o eucalipto, pois apresentou maior crescimento inicial. Em plantio misto o tratamento T5 (25E:75A) apresentou o maior acúmulo de biomassa, sendo 35,1% nas folhas, 25,8% nos galhos e 39,1% no tronco. O acúmulo de biomassa para cada fração, teve a seguinte ordem, para T1 e T3: tronco>galho>folha e, para T2, T4 e T5: tronco>folha>galho. Os maiores teores de nutrientes da biomassa das árvores, encontram-se nas folhas, seguidas de galhos e tronco. A acácia-negra em plantio homogêneo, apresentou maior acúmulo de nutrientes, pois teve maior quantidade de biomassa total. A maior porcentagem de grãos de milho, foi observada no T4(75E:25A), com 38,4% da biomassa total deste tratamento. Os grãos, apresentaram os maiores teores para N, P, Mg, B e Zn. No tratamento T4(75E:25A), a cultura do milho exportou mais nutrientes, por apresentar maior produção de grãos.
6
Soares, Gustavo Martins. "Dinâmica do crescimento em plantios mistos de Eucalyptus globulus e Acacia mearnsii." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-06012016-174312/.
Full textAbstract:
O objetivo deste estudo foi avaliar a dinâmica do crescimento em consórcios de Eucalyptus globulus e Acacia mearnsii e suas interações. O experimento foi instalado no ano de 2005, em duas fazendas localizadas no município de Piratini - RS, onde foram plantadas as espécies Eucalyptus globulus (E) e Acacia mearnsii (A), em monocultivo (100%E e 100%A) e consorciadas em linhas simples (50%E:50%A - LS) e em linhas duplas (50%E:50%A - LD). Para avaliarmos os efeitos dos consórcios no crescimento das espécies, os tratamentos foram analisados nos anos de 2006, 2007, 2008, 2010 e 2013; no ano de 2014 foi realizada a cubagem pelo método de Smalian e a determinação da biomassa de folhas, galhos, lenho e total e do índice de área foliar (IAF) pelo método destrutivo. A classificação da capacidade produtiva das espécies foi realizada pelo método da curva-guia em função da altura dominante (Hd) e idade. Foram testados três diferentes modelos de crescimento, seis modelos de equações hipsométricas e o modelo de Clutter para a estimação e predição da produtividade por unidade de área. Além disso, foi realizada a modelagem da distribuição diamétrica a partir da estimação dos parâmetros da função densidade de probabilidade (f.d.p.) Weibull de dois parâmetros e testado o emprego das redes neurais artificiais (RNA) para a estimação da altura. A acácia-negra teve seu crescimento em altura beneficiado pelo consórcio, já para o eucalipto não foi possível observar vantagens no crescimento em altura. O DAP para ambas espécies foi influenciado pelos consórcios, positivamente para a acácia-negra e negativamente para o eucalipto, diferenças que são explicadas pelas variações dos espaçamentos proporcionadas ao se manter o espaçamento convencional de plantio das espécies nos tratamentos consorciados. O volume individual teve alta correlação com o DAP (0,92). A produtividade da acácia-negra nos consórcios foi superior a 50% a da monocultura, o que não ocorreu para o eucalipto. As produtividades totais dos consórcios foram iguais estatisticamente as das monoculturas. Os sistemas consorciados foram eficazes em diminuir a mortalidade da acácia-negra. Quando analisada a compartimentalização da biomassa individual acima do solo e o IAF, não foram encontradas diferenças significativas entre os modelos de consórcio e as monoculturas. A classificação da capacidade produtiva das espécies pelo método da curva-guia mostrou-se eficiente, sendo capaz de classificar os tratamentos em diferentes sítios de produção, demonstrando a relação das variáveis do povoamento com a capacidade produtiva dos locais. O único modelo, de crescimento e de relação hipsométrica, que foi capaz de estimar as variáveis com precisão foi o de Chapman-Richards e o H∼∫ (DAP, Hd, AS, Idade), respectivamente. O modelo de Clutter foi indicado tanto para os modelos de consórcio quanto para os monocultivos. A f.d.p. Weibull de dois parâmetros captou de forma precisa a distribuição dos diâmetros e o sistema de equações proposto para a recuperação dessa distribuição pode ser empregado nas diferentes situações de manejo testadas. As RNA possuem potencial de uso para a estimação da altura em monocultivos de eucalipto e acácia-negra, bem como nos consórcios entre essas espécies, gerando estimativas precisas e com pequena tendenciosidade.The objective of this study was to evaluate the growth dynamics in a mixed-species plantations of Eucalyptus globulus and Acacia mearnsii and their interactions. The experiment was installed in 2005, on two farms in municipality of Piratini - RS, where was planted the species Eucalyptus globulus (E) and Acacia mearnsii (A), in monoculture and mixed in simple lines (50%E:50%A - LS) and double lines (50%E:50%A - LD). To evaluate the effects of mixed-plantings in the growth of the species, the treatments was analysed in 2006, 2007, 2008, 2010 and 2013; in 2014 was realized the volume evaluation by the Smalian method and the determining of the biomass of leaves, twigs, wood and total and the leaf area index (LAI) by the destructive method. The site index of each species was realized by the guide-curve method in function of the dominant height (Hd) and ages. Three different growth models, six different height-diameter models and the Clutter model to estimate and predict the productivity per unit area, were tested. Moreover, modeling the diametric distribution as of the estimation of the parameters of the probability density function two parameters Weibull and the use of the artificial neural network (ANN) for the height estimate was tested. The black wattle had their height growth benefited for the mixed-plantations, for eucalyptus was not observed advantages in height growth. The DBH was influenced by the mixed-plantings for both species, positively to the black wattle and negatively for eucalyptus, differences that are explained by variations in spacing provided to keep the conventional spacing of planting the species in the intercropping treatments. The individual volume had high correlation with DBH (0,92). The productivity of black wattle in the mixed-plantings was higher than 50% of monoculture, which did not occur for eucalyptus. The total productivity of mixed-plantings were statistically equal the monocultures. Mixed-plantings were effective in reducing mortality of black wattle. When analyzing the compartmentalization of the individual aboveground biomass and the IAF, there were no significant differences between the mixedplantings models and monocultures. The site index classification of the species using the guide-curve method was effective, being able to classify out the treatments at different production indexes, showing the relation between the stand variables and productive capacity of local. The only model of growth and height-diameter ratio, which was able to estimate the variables with accuracy was the Chapman-Richards and H∼∫(DBH, Hd, AS, Age), respectively. The Clutter model was indicated both for the models of mixed-plantings as for the monocultures. The probability density function two parameters Weibull represented accurately the distribution of diameters and the system of equations proposed for the recovery of this distribution can be used in different management situations tested. The ANN have potential use for the estimation of height in eucalyptus and black wattle monocultures and in mixed-plantations with these species, with accurate and little bias estimates.
7
Finger, Cesar Augusto Guimarães. "Distribuição de diâmetros em Acácia negra Acácia mearnsii de Wild, em diferentes povoamentos e idades." reponame:Repositório Institucional da UFPR, 2013. http://hdl.handle.net/1884/24764.
Full textAbstract:
O presente trabalho teve como objetivos estudar a distribuição diamétrica de acácia negra em povoamentos independentes, selecionar a equação que melhor descrevesse as distribuições e estudar as variações das distribuições em diferentes idades.
Os dados provem da Fazenda Dona Bernarda, de propriedade da TANAC S.A. em Montenegro, Rio Grande do Sul (nas coordenadas geográficas de 30° de latitude sul e 52° de longitude oeste e clima do tipo Cfa , subtropical , segundo Köeppen).
Foram estudados os diâmetros quanto a distribuição e estabilidade em relação a curva normal nas idades de 3,5 a 7,5 anos , através do pacote de computação MLESD - Maximun Likelihood Estimation for Selected Distributions.
As distribuições testadas foram Normal, Log-normal, Gama, Weibull, SB e Beta. Estas foram ajustadas pelo método de Máxima Probabilidade e selecionadas pelo critério do Logarítmo da Probabilidade e Kolmogorov-Smirnov.
A distribuição SB foi a selecionada para descrever os dados de diâmetros nas cinco idades estudadas. No entanto, a distribuição Beta nas idades de 3,5 , 5,5 , e 7,5 e a Weibull na idade de 3,5 anos, também podem ser utilizadas, porém, com ajustes um pouco inferiores que os proporcionados pela distribuição SB.
As equações Normal, Log-normal e Gama não ofereceram bons ajustes em nenhuma das idades estudadas, sendo desaconselháveis as suas utilizações para descrever a distribuição de diâmetros de acácia negra.
8
Ono, Maria Angélica. "Dinâmica de infestação em Acacia mearnsii e ecologia de Oncideres impluviata (Coleoptera: Cerambycidae)." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-13112015-165903/.
Full textAbstract:
Neste estudo a dinâmica de quebra de galhos de acácia negra foi investigada com análise de séries temporais e modelagem ecológica, em conjunto de dados obtidos durante oito anos, visando compreender como se dá o comportamento de Oncideres impluviata (Colepotera, Cerambycidae) em diferentes áreas de plantios florestais, em fazendas localizadas em diferentes municípios do Rio Grande do Sul. A diversidade de cerambicídeos também foi analisada em duas fazendas localizadas no município de maior abundancia de O. impluviata. Os resultados sugerem que a maior abundância de galhos quebrados se dá em Cristal e Encruzilhada do Sul. O município de Piratini exibiu menor densidade de galhos quebrados, entretanto, a projeção dos valores médios de galhos seguiu um padrão aparentemente exponencial para Cristal e Encruzilhada do Sul e sigmóide para Piratini. As funções de autocorrelação e autocorrelação parcial não evidenciaram claras tendências de ciclos nas séries para os três municípios, mas as tendências de ocorrência de picos similares aos surtos diferiram nos três municípios quando a análise espectral foi aplicada. A dinâmica analisada pela equação de Ricker indicou a ocorrência de equilíbrio estável, ciclo limite e comportamento caótico nos três municípios, porém, com menor prevalência de caos em Piratini. A migração espacial mostrou maior poder de estabilização populacional em Cristal e Encruzilhada do Sul em razão das maiores taxas de crescimento presentes nestes municípios. Quinze espécies de cerambicídeos foram encontradas em duas fazendas pertencentes ao município de Encruzilhada do Sul e Oncideres impluviata, Nesozineus alphoides e Ygapema delicata foram as espécies de cerambicídeos mais abundante nas áreas analisadas. As curvas de rarefação atingiram assíntotas de forma satisfatória, comprovando a suficiência do esforço amostral.In this study, the dynamics of black wattle broken branches was investigated with time series analysis and ecological modeling in dataset obtained during eight years, in order to understand how O. impluviata (Coleoptera, Cerambycidae) behaves in different forests placed in farms of different municipalities of the Rio Grande do Sul, Brazil. The diversity of cerambycids wal also analysed in two farms placed in the municipality with the highest abundance of O. impluviata. The results suggest that higher abundance of broken branches occurs in Cristal and Encruzilhada do Sul. Piratini exhibited the lowest density of broken branches, however, the projection of mean values of branches followed an apparently exponential pattern in Cristal and Encruzilhada do Sul and sigmoid in Piratini. The autocorrelation and partial autocorrelation functions did not show clear trends of cycles in the series of the three municipalities, but the peak occurrence trends similar to the outbreaks differed in the three municipalities when the spectral analysis was applied. The dynamics analysed with the Ricker equation indicated stable equilibrium, limit cycle and chaos in the three municipalities, but, with lower prevalence in Piratini. The spatial migration showed higher power to stabilize population in Cristal and Encruzilhada do Sul in response to high growth rates in these municipalities. Fifteen species of cerambycids were found in the two farms in Encruzilhada do Sul and O. impluviata, Nesozineus alphoides and Ygapema delicate were the most abundant species in the areas. The rarefaction curves showed satisfactory asymptotes, confirming the adequacy of the sampling effort.
9
Murari, Augusto Bolson. "LEVANTAMENTO POPULACIONAL DE SCOLYTIDAE (COLEOPTERA) EM POVOAMENTO DE ACÁCIA-NEGRA (Acacia mearnsii De Wild)." Universidade Federal de Santa Maria, 2005. http://repositorio.ufsm.br/handle/1/8618.
Full textAbstract:
This work was developed objectifying the quali-quantitative analysis, the population fluctuation, the faunistic analysis and the correlation of the species of Scolytidae (Coleoptera) with the main meteorological elements in a stand of Acacia mearnsii with four years of age. The stand was located in the Farm Menezes, country of Butiá, Rio Grande do Sul, and was of property of the company AGROSETA S.A. It was placed 35 ethanolic flight intercept traps distributed inside of the stand. The collections had occurred during the period of November 2003 until October 2004 and being made between ten up to fifteen days of interval each one, totalizing 26 collections. For the analysis of the data, the frequency, dominance, constancy and abundance indexes were calculated. The capture of the insects was correlated with the precipitation, temperature and relative humidity of air. It was collected 13.812 individuals distributed in 37 species of Scolytidae. The species most frequent, dominant, constant and abundant were Hypothenemus seriatus Eichhoff 1872, Hypothenemus eruditus Eichhoff, 1868, Xyleborinus saxeseni (Ratzeburg, 1837) and Xylosandrus retusus (Eichhoff, 1868), representing 86,89% of the frequency of captured individuals. The species of the gender Hypothenemus were the most captured, being equivalent 59,71% of the total of Scolytidae. The total of Scolytidae demonstrated positive correlation with the relative humidity of air. H. seriatus, A. obliquus and X. ferrugineus demonstrated positive correlation with the temperature. The species Xyleborinus gracilis and A. obliquus demonstrated negative correlation with the precipitation.Este trabalho foi desenvolvido objetivando a análise qualiquantitativa, a flutuação populacional, a análise faunística e a correlação das espécies de Scolytidae (Coleoptera) com os principais elementos meteorológicos em um povoamento de Acacia mearnsii com quatro anos de idade. O povoamento localizava-se na Fazenda Menezes, município de Butiá, Rio Grande do Sul, sendo de propriedade da empresa AGROSETA S.A. Foram colocadas 35 armadilhas etanólicas de interceptação de vôo, distribuídas dentro do povoamento. As coletas ocorreram durante o período de novembro de 2003 até outubro de 2004, sendo feitas entre dez a quinze dias de intervalo cada uma, totalizando 26 coletas. Para a análise dos dados foram calculados os índices de freqüência, dominância, constância e abundância. A captura dos insetos foi correlacionada com a precipitação, as temperaturas média mínima, média e média máxima, e umidade relativa do ar. Foram coletados 13.812 indivíduos distribuídos em 37 espécies de Scolytidae. As espécies mais freqüentes, dominantes, constantes e abundantes foram Hypothenemus seriatus Eichhoff 1872, Hypothenemus eruditus Eichhoff, 1868, Xyleborinus saxeseni (Ratzeburg, 1837) e Xylosandrus retusus (Eichhoff, 1868), representando 86,89% da freqüência de indivíduos capturados. Espécies do gênero Hypothenemus foram as mais capturadas, equivalendo a 59,71% do total de Scolytidae. O total de Scolytidae demonstrou correlação positiva com a umidade relativa do ar. H. seriatus, A. obliquus e X. ferrugineus demonstraram correlação positiva com a temperatura. As espécies Xyleborinus gracilis e A. obliquus demonstraram correlação negativa com a precipitação.
10
Avoseh, Opeyemi Nudewhenu. "Isolation, characterisation of terpenoids and biosynthesis of silver nanoparticles of acacia mearnsii de wild and acacia Karroo Hayne and their Bioassays." Thesis, University of Fort Hare, 2015. http://hdl.handle.net/10353/d1021292.
Full textAbstract:
Great wealth of traditional knowledge about the use of plants had been transferred from generation to generations leading to the present day drug discovery and invention of new scientific methods of isolation, purification and identification. With the discovery of new diseases and drug-resistant organisms, there is no other source or deposit of lead compounds or drugs than the plant kingdom. As a result of this, about 25% of the current drug administered owe their origin to plant sources with the view to reduce the carcinogenic effect of synthetic drugs. Volatile terpenoids among other broad spectrum of natural product had been implicated to show high therapeutic properly. In the present study, selected locally-used medicinal plants were exploited for the presence of potent bioactive compounds and ability to form nanoparticles with distinctive property for use as chemoprotective agent against inflammation, tumors, cancer and other chronic diseases. Acacia mearnsii De Wild and Acacia karroo Hayne studied in this report are known to be invasive species with no proper regulation to conserve and preserve them. However, ethnopharmacology report of these plant species in the Southern Africa region reveals that they are good antiseptic, anti-diarrhea, anti-inflammation and a forage for livestock. These plants were subjected to volatile extraction protocol of some parts of the plants (stem and leaves) followed by examination of the anti-inflammation capacity of the extracts using an animal model. In addition, the bye-product (hydrosol) from the stem bark of each species possess a high reducing and stabilizing property leading to synthesis of silver nanoparticles, followed by investigation of the anti-inflammation potential of the synthesized silver nanoparticles using animal model. The volatile oils of the leaves and stem bark of Acacia mearnsii De Wild obtained by hydro-distillation were analyzed by Gas Chromatography-Mass Spectrometry (GC-MS). Twenty, Thirty-Eight, Twenty-nine and Thirty-Eight components accounting for 93.8%, 92.1%, 78.5% and 90.9% of the total oils of the fresh, dry leaves and fresh, dry stem bark respectively. The major components of the oil were octadecyl alcohol (25.5%) and phytol (10.5%); cis-verbenol (29.5%); phytol (10.1%) and phytol (23.4%) for the fresh leaves, dried leaves, and fresh stem, dry stem bark respectively. Oral administration of essential oils at the dose of 2% showed significant (p<0.05) anti-inflammatory properties in the albumin induced test model in rats. Oils from the fresh leaves and dry stems inhibited inflammation beyond 4 h post treatment. Furthermore, the chemical composition of the essential oils obtained by hydro-distillation from the leaves and stem bark (dry and fresh) of Acacia karroo Hayne, analysed by GC-MS, shows that hexanal (10.67%) and ß-ionone (9.74%) were dominant in the dried leaves, β-pinene (14.30%), and (Z)-2-Hexen-1-ol (10.21%) in the fresh leaves while Octacosane (10.59%) and phytol (23.38%) were dominant in the dry and fresh stem respectively. The anti-inflammation ability of these oils after an albumin-induced inflammation on wistar rats, shows a significant effect at the 1st h of treatment with a significance of P< 0.01 for all part plants, while the fresh leaves shows further inhibitory activities at the 2nd h of analysis. Silver nanoparticles (AgNPs) were successfully synthesized from AgNO3 through a green route using the aqueous extract (hydrosols) of Acacia mearnsii De Wild and Acacia karroo Hayne as reducing agent and as well as capping agent. The Acacia-mediated AgNPs were characterized with the use of UV-vis absorption spectroscopy, Fourier Transform Spectroscopy (FT-IR), Transmission electron microscope (TEM), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDX), and X-ray Diffractometry (XRD). A spherical, 10-40 nm diameter silver nanoparticles were synthesized with very low level of stability for the AMDS and the AKDS-AgNPs. In addition, nociceptive activity with a mice rat reveals higher inhibition at the neurogenic phase for the AKDS-AgNPs, while AMDS-AgNPs exhibited a high inhibition at the inflammatory phase. The potent anti-inflammatory activity of essential oils of A. mearnsii De Wild and A. karroo Hayne hereby confirmed its traditional use in treating various inflammatory diseases, while the inflammatory studies on the synthesized AgNPs reveals a very active compound which can be used as a potent opioid or non-steroidal anti-inflammatory drug (NSAID).
Books on the topic "Acacia mearnsii"
1
La Investigación con Acacia dealbata, Acacia melanoxylon y Acacia mearnsii en Chile. INFOR, 2005. http://dx.doi.org/10.52904/20.500.12220/4875.
Full textAbstract:
El proyecto "Masificación y Desarrollo de Opciones Productivas en Base a Especies de Acacia probadas en Chile" adjudicado por el Instituto Forestal, contempla el estudio de 3 especies del género Acacia. El presente texto corresponde a una compilación respecto a los antecedentes más relevantes sobre Acacia melanoxylon, Acacia dealbata y Acacia mearnsii, recopilados desde distintas fuentes de información, tanto las propias de INFOR como nacionales. El objetivo de este documento es presentar un resumen de los resultados de la investigación con estas especies, poniendo a disposición de los interesados con distintos niveles de desarrollo información técnica relevante, permitiendo con esto la masificación y difusión de las especies, la asignación más racional de recursos y la toma de decisiones a distinto nivel en base a información certera.
2
Incorporación de especies del género Acacia a la producción forestal chilena. 3. Acacia mearnsii. INFOR, 2000. http://dx.doi.org/10.52904/20.500.12220/4091.
Full textAbstract:
Acacia mearnsii es una latifoliada que presenta distintos crecimientos dependiendo del ambiente donde se desarrolla. Es importante y muy utilizada para la producción de taninos a partir de su corteza.
3
Pinilla Suárez, Juan Carlos. Informe Técnico 147: Descripción y antecedentes básicos sobre Acacia dealbata, Acacia melanoxylon y Acacia mearnsii. Revisión bibliográfica. INFOR, 2000. http://dx.doi.org/10.52904/20.500.12220/6628.
Full text
4
Molina Brand, María Paz, and Juan Carlos Pinilla Suárez. Manual de producción de plantas de Acacia dealbata, A. mearnsii y A. melanoxylon. INFOR, 2004. http://dx.doi.org/10.52904/20.500.12220/4506.
Full textAbstract:
La diversificación forestal apunta en dos direcciones: por un lado el estudio de especies de alto valor comercial, dada su escasez en los mercados y por otra parte la búsqueda de especies multipropósito, de modo de integrar la componente forestal dentro de un sistema productivo mayor, la cual puede contribuir a la economía predial mediante varios usos en lo que se destacan madera para pulpa, madera sólida, leña, miel, frutos, recuperación de suelos, forraje o siendo parte de métodos agroforestales como silvopastoreo o cortinas cortavientos. De acuerdo con lo anterior, un género promisiorio para introducir en Chile, debido a su grado de adaptabilidad edafoclimática, diversidad de productos a obtener y su habilidad para recuperar suelos degradados, es Acacia, con sus especies A. melanoxylon R. Brown, A. dealbata Link y A. mearnsii de Wild. El presente trabajo entrega criterios generales para la producción de plantas de las especies ante mencionadas, en base a un estudio bibliográfico y según las experiencias obtenidas por el Instituto Forestal en su vivero de la sede Bío-Bío, en el contexto del proyecto INFOR-FDI-CORFO Masificación y Desarrollo de Opciones Productivas en Base a Especies de Acacia probadas en Chile.
5
Campos P., Raúl, Gonzalo Hernández C., Karina Luengo Vergara, and Juan Carlos Pinilla Suárez. Propiedades físicas y mecánicas de la madera y usos industriales Acacia melanoxylon R. Br. INFOR, 2017. http://dx.doi.org/10.52904/20.500.12220/21405.
Full textAbstract:
INFOR ha desarrollado durante el año 2003 un intenso programa de investigación con especies del género Acacia, en el cual se han abordado los aspectos de propagación, establecimiento de plantaciones, manejo silvícola y utilización de sus maderas, incluyendo en estas investigaciones a Acacia dealbata, A. melanoxylon y A. mearnsii, especies que en investigaciones anteriores ya habían mostrado buenos crecimientos en diferentes regiones del país. Este programa se ha orientado principalmente a los pequeños y medianos propietarios, con el fin de entregarles herramientas técnicas que les permitan incorporar nuevas alternativas en sus predios y generar nuevas posibilidades de negocios. Estos trabajos han contado con el apoyo del programa FIC FNDR/FIC-2013 Región del Bio Bio para que INFOR desarrolle el proyecto Fortalecimiento de la Competitividad de Pequeñas y Medianas Empresas y Propietarios Forestales de la Región del Bio Bio, a través de la difusión y promoción de la utilización de especies forestales de Acacias de un alto potencial productivo
6
Campos P., Raúl, Gonzalo Hernández C., Karina Luengo Vergara, and Juan Carlos Pinilla Suárez. Propiedades físicas y mecánicas de la madera y usos potenciales Acacia dealbata Link. INFOR, 2016. http://dx.doi.org/10.52904/20.500.12220/21130.
Full textAbstract:
El Instituto Forestal (INFOR) está desarrollando desde el año 2003 un intenso programa de investigación con especies del género Acacia, el cual ha abordado los aspectos de propagación, establecimiento de plantaciones, manejo silvícola y utilización de sus maderas, incluyendo en estas investigaciones a Acacia dealbata, A. melanoxylon y A. mearnsii. Lo anterior orientado principalmente a los pequeños y medianos propietarios, con el fin de entregarles herramientas técnicas que les permitan nuevas alternativas para sus predios y generar nuevas posibilidades de negocios. En este contexto, Acacia dealbata podría aportar y diversificar la oferta del mercado regional de madera de calidad, para usos relacionados con la industria de la construcción y del mueble, generando oportunidades de desarrollo local
Book chapters on the topic "Acacia mearnsii"
1
Quoirin, M., A. Galiana, D. K. S. Goh, A. Limanton, V. Gratio, J. Ahée, M. Rio, D. Oliveira, E. Duhoux, and C. Franche. "Progress towards the Genetic Transformation of Four Tropical Acacia Species: Acacia Mangium, Acacia Crassicarpa, Acacia Mearnsii and Acacia Albida." In Molecular Biology of Woody Plants, 161–78. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-2313-8_8.
Full text
2
Onchere, Naftali Manddy. "Acacia Mearnsii for Income Generation and Environmental Protection in Kenya." In Combating Desertification with Plants, 205–16. Boston, MA: Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1327-8_19.
Full text
3
Pedron, Leandra, Ervandil Corrêa Costa, Dayanna do Nascimento Machado, Leonardo Mortari Machado, Jardel Boscardin, Marciane Danniela Fleck, Mateus Alves Saldanha, and Jéssica Maus da Silva. "FAUNA DE FORMIGAS EM PLANTIO DE ACACIA MEARNSII DE WILD NO SUL DO ESTADO DO RIO GRANDE DO SUL." In Silvicultura e Manejo Florestal: Técnicas de Utilização e Conservação da Natureza - Volume 1, 182–89. Editora Científica Digital, 2021. http://dx.doi.org/10.37885/201102063.
Full text
4
Souza, Natallia Britto Azevedo, Nicole Dall’accua Lopes, Rogério da Silva Camargo, André Ricardo Felkl de Almeida, and Valéria Terra Crexi. "PRODUÇÃO DE CARVÃO ATIVADO A PARTIR DO RESÍDUO DA CASCA DA ACÁCIA NEGRA (ACACIA MEARNSII DE WILD) PARA O BRANQUEAMENTO DO ÓLEO DE ARROZ." In Desvendando a Engenharia: sua abrangência e multidisciplinaridade - Volume 2, 363–78. Editora Científica Digital, 2021. http://dx.doi.org/10.37885/210705437.
Full textConference papers on the topic "Acacia mearnsii"
1
OLIVEIRA, LEONARDO, Lucas Orteal da Fonseca, and Felipe dos Santos Cardoso. "TAXA DE SECAGEM AO AR LIVRE DA MADEIRA DE Acacia mearnsii E Pinus taeda EM PELOTAS-RS." In 9° Congresso Florestal Brasileiro. Rio Grande do Sul: Softaliza Tecnologias LTDA, 2022. http://dx.doi.org/10.55592/cfb.2022.8132982.
Full text
2
Longhi, R. V., P. R. Schneider, R. Cubas, T. Baldin, J. O. Mendes, and E. A. Costa. "Desempenho de modelos hipsométricos para Acacia mearnsii De Wild em um povoamento com diferentes capacidades produtivas no RS." In VIII Simpósio Brasileiro de Pós-Graduação em Ciências Florestais. Recife, Pernambuco, Brasil: Universidade Federal Rural de Pernambuco, 2014. http://dx.doi.org/10.12702/viii.simposfloresta.2014.41-546-1.
Full text
3
Pedrotti, Carine, Bianca Bolson, and Joséli Schwambach. "Extrato pirolenhoso de Acacia mearnsii De Wild. como controle alternativo de Fusarium oxysporum Schltdl. em repolho (Brassica oleracea L. var. capitata)." In I Simpósio Estadual de Produtos Naturais. ,: Even3, 2021. http://dx.doi.org/10.29327/isedpmdes2020.332320.
Full text
4
RODRIGUES, TEREZA LONGARAY, PAULA DA CRUZ PEDROSO, ANA CLARA PRADO CARVALHO, MARCILIO MACHADO MORAIS, GABRIELA SILVEIRA DA ROSA, and ANDRÉ RICARDO FELKL DE ALMEIDA. "EFEITO DAS CONDIçõES EXPERIMENTAIS NO PROCESSO DE DESLIGNIFICAçãO DOS RESíDUOS DA CASCA DE ACáCIA-NEGRA (ACACIA MEARNSII DE WILD.) VIA PRé-TRATAMENTO ALCALINO." In ANAIS DO XL CONGRESSO BRASILEIRO DE SISTEMAS PARTICULADOS. Uberlândia - MG, BR: Galoa, 2022. http://dx.doi.org/10.17648/enemp-2022-159164.
Full text