Letteratura scientifica selezionata sul tema "Soils Zinc content"
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Articoli di riviste sul tema "Soils Zinc content"
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Lahučký, Ladislav, Daniel Bajčan e Pavol Trebichalský. "Vertical Zinc Migration in Various Soil Types". Agriculture (Polnohospodárstvo) 57, n. 2 (1 giugno 2011): 61–67. http://dx.doi.org/10.2478/v10207-011-0007-y.
Testo completoAbstract (sommario):
Vertical Zinc Migration in Various Soil TypesIn this contribution the zinc content in selected soil types and soil reaction on zinc loading in kinetic model conditions with knock-down columns filled with soil samples are evaluated. The total zinc content after their draining, finish and decomposition by HF + HClO4mixture and its fractions content in extract of 2 mol dm-3HNO3, in extract of 0.05 mol dm-3EDTA and in extract of 0.01 mol dm-3CaCl2using atomic absorption spectrometry method were determined.The knock-down columns filled with soil samples in model kinetic conditions were used for observation of zinc sorption measure. The maximal water capacity of soils was determined and then solution of 280 mg zinc (ZnSO4.2H2O) per kilogram of soil was applied. The zinc contents in extraction solutions 2 mol dm-3HNO3, 0.05 mol dm-3EDTA and 0.01 mol dm-3CaCl2in drained 0.05 m high soil columns by atomic absorption spectrometry method were determined.The obtained results were evaluated by mathematical-statistical methods - multiple range analysis and linear regression. Achieved data were compared to allowed limit values.The results show different behavior of individual soil types against zinc loading. The soils showed different properties, where zinc migration to the lower column layers was determined. The accent is given to zinc dynamics in neutral and acid soils. The limit value A (140 mg kg-1) was observed in Luvic Cambisol. The limit value A1 (40 mg kg-1) was observed in Eutric Regosol and Luvic Cambisol in upper layer of soil in column. The obtained results show high mobility of zinc in tested soils and thus its risk for ecosystems.
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Padhan, Dhaneshwar, Arup Sen e Biplab Pal. "DTPA-Extractable Zinc in Rice Soils and Its Availability to Rice". Current World Environment 11, n. 2 (25 agosto 2016): 662–69. http://dx.doi.org/10.12944/cwe.11.2.39.
Testo completoAbstract (sommario):
Zinc (Zn) deficiency is a fairly wide spread agronomic constraint in many of the world rice production regions. Information on soil Zn distribution is essential for understanding its chemical reactions and bioavailability. In this backdrop, we tried to find out the relationship between physic-chemical properties and DTPA-extractable Zn (available Zn) content of rice soils. For this eighty four (84) surface soil samples (0-20cm) were collected from three villages (viz. Saharapali, Nuagarh and Adgaon) of Bargarh district under the Hirakud Command Area of Odisha. Analytical observations revealed that the soils were slightly acidic in reaction with moderately high content of soil organic carbon. Considering the critical limit of available Zn in soils to be 0.6 mg kg-1, all soils of the study area were found to be well supplied with DTPA-extractable Zn. Soil organic carbon (SOC) content maintained positive and significant correlation with available zinc content in soils. However, soil pH showed significant but negative correlation with available zinc content of soils.
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Han, Ya Fen. "Evaluation of Zinc Pollution in Soils of Suzhou City". Advanced Materials Research 534 (giugno 2012): 273–76. http://dx.doi.org/10.4028/www.scientific.net/amr.534.273.
Testo completoAbstract (sommario):
Choose Suzhou city’s different functional areas (industrial zone, commercial district, near the station, residential area and urban green space) to collect 55 surface soil samples and determine the zinc content of the soils by XRF and evaluate the zinc pollution level in soils with the methods of geo-accumulation index and zinc pollution index respectively. Result: The fact that the average content of Zn is beyond the soil background value in Anhui province shows soils of Suzhou city have suffered from different degrees of zinc pollution; In industrial zone, commercial district and near the station ,the zinc content of the soils is commonly higher which is mainly related to the transportation and industrial production; the evaluated results of geo-accumulative index and zinc pollution index methods show zinc pollution in soils of Suzhou city belongs to mild pollution and partial moderate pollution and the pollution is particularly serious in industrial zone, commercial district and near the station.
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Saakian, Alexander. "Monitoring the content of manganese, zinc, and cobalt in Haplic Chernozem". АгроЭкоИнфо 4, n. 46 (19 agosto 2021): 16. http://dx.doi.org/10.51419/20214416.
Testo completoAbstract (sommario):
The paper uses the materials of local agroecological monitoring of arable soils of the Belgorod region on the content of manganese, zinc, and cobalt in haplic chernozem of the steppe part of the Belgorod region. The content of manganese, zinc and cobalt in the arable horizon was 1.42, 1.22 and 1.23 times higher than in the parent rock, respectively. A strong correlation was established between the total contents of zinc and cobalt in the soil profile (r=0.77), and the bonds of manganese with zinc and cobalt had the strength of an average value (r=0.59 and r=0.55). The content of mobile forms of the studied trace elements in haplic chernozem is at a low level. The main reason for the shortage of mobile forms of manganese, zinc and cobalt is their low background content in virgin soil. Keywords: HAPLIC CHERNOZEM, GROSS CONTENT, CONTENT OF MOBILE FORMS, MANGANESE, ZINC, COBALT
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Poláková, Šárka, e Miroslav Florián. "Balance and forms of zinc in soil and its uptake by plants". Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 54, n. 1 (2006): 59–70. http://dx.doi.org/10.11118/actaun200654010059.
Testo completoAbstract (sommario):
In this paper, zinc flows in arable soils of the Czech Republic and zinc fractions in arable soils are studied. Furthermore, a zinc uptake by agricultural plants is focused. Based on a database of the programme The basal soil monitoring system (BSMS) a static zinc balance for arable soils on the national level was assessed. This programme is carried out by The Central Institute for Supervising and Testing in Agriculture (CISTA) in Brno. As a representative for the zinc balance calculation, 121 monitoring plots were chosen. The Czech Republic net zinc fluxes ranged from –1250 g.ha– 1.y– 1 to +5595 g.ha– 1.y– 1, median +453 g.ha– 1.y– 1. The maximum zinc fluxes are typical of plots with manure applications. An atmospheric deposition is the most important input of zinc into arable soils. It makes 96,6% of the whole inputs. Leaching and run-off are neglected in this zinc balance by reason of missing credible data. The project Examination of zinc availability in dependence on its form in soil was established to provide more information about behavior of zinc in soil. The first step was starting a greenhouse pot experiment, which was focused on comparison of several extraction agents (AR, 2M HNO3, 0.43M HNO3, Mehlich III, DTPA, CAT, 1M NH4NO3, 0.01M CaCl2). Four soils with increasing zinc content were picked out for this experiment (Domanínek, Chrlice, Kutná Hora, Hlízov). Total zinc contents in these selected soils ranged from 156.8 to 583.7 ppm in dry matter (Aqua regia extraction). Contents in plants were in wide range from 20.7 to 273 ppm in dry matter according to the plant variety and used soil. Strong correlations between 0.43M HNO3, Mehlich III, DTPA and CAT were proved. Using of weaker extraction agents enabled to distinguish geogenic and anthropogenic origin of the contamination.
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Hernandez, Jorge David, e Randy Killorn. "Phosphorus fertilizer by-product effect on the interaction of zinc and phosphorus in corn and soybean". Canadian Journal of Soil Science 89, n. 2 (1 maggio 2009): 189–96. http://dx.doi.org/10.4141/cjss07069.
Testo completoAbstract (sommario):
The application of high phosphorus fertilizer by-products to farmland is a common practice used to reduce storage volume and disposal cost. However, because Iowa soils are generally high in both phosphorus and zinc, there are environmental and fertility questions concerning their application to farmland. A greenhouse study was conducted to determine the effect of a soil-applied fertilizer by-product on the zinc-phosphorus relationship in corn and soybean plants grown on three Iowa soil series: Belinda, Downs, and Haig. The soils were mixed with a high-phosphorus fertilizer by-product and plants were also collected and analyzed for phosphorus and zinc content and uptake. Soil samples were analyzed for phosphorus and zinc content. The experiment was repeated, switching pots to assess the residual effect after one cycle of rotation. The treatments were arranged in a totally randomized design with three replications. The results indicated that the high phosphorus fertilizer by-product increased soil and plant concentrations of phosphorus in soybean and corn plants and soils. However, the increase of P concentration did not induce changes in the phosphorus-zinc interaction in corn and soybean plants in any of the studied soils. Key words: Phosphorus, corn, soybean, zinc, sludge, by-products, Zn-P relationship, zinc-phosphorus interaction
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Ihsan Ramadhan, Payizan, e Lazkeen Ahmed Merween Mehmedany. "Zinc Adsorption in Different Calcareous Soils". Journal Of Duhok University 23, n. 2 (14 dicembre 2020): 118–30. http://dx.doi.org/10.26682/ajuod.2020.23.2.15.
Testo completoAbstract (sommario):
Zinc adsorption was studied for ten selective representative soils according the difference amount of clay content, calcium carbonate and organic matter in Duhok governorate, Iraqi-Kurdistan region included (Kanimasi-1&2, Batofa, Zakho, Assih, Semeel, Khanke, Faydi, Zawita and Bamarny locations). Samples were air dried and sieved through a 2-mm sieve to study the physical and chemical characteristics of the soils, forms of zinc and it’s adsorption. Results showed the soluble, DTPA extractable zinc (available), CaCl2 extractable zinc (exchangeable) and total zinc ranged between (0.29 – 0.94), (0.88 – 1.64), (1.71 – 2.05), and (12.25 – 56.15) mg kg-1 respectively. Negative significant correlation found between soluble zinc with pH, also negative significant correlation found between DTPA extractable zinc with exchangeable potassium, bicarbonate and available phosphorus but positive significant correlation found between CaCl2 extractable zinc with pH, total–Zn negatively affected with pH and positively with HCO3 and sand. Results demonstrated that by increasing added zinc concentration to studied soil zinc will be adsorbed zinc adsorbed greatly at temperature 25°C and 48°C. In general total zinc adsorbed at 25C° in six concentrations was less than zinc adsorbed at 48C°. At temperatures 25°C and 48°C the high total amount of zinc adsorbed found in the soil of Zawita and Zakho respectively, but the lower total zinc adsorbed observed in soil of Batofa and Kani masi-2. The quantity of adsorption affected positively by presence of clay, calcium carbonate, active calcium carbonate and cation exchange capacity and negatively affected by the ion concentration of bicarbonate, calcium, potassium, organic matter and sand content.
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Sarkar, A. K., e D. L. Deb. "Fate of fertilizer zinc in a black soil (Vertisol)". Journal of Agricultural Science 104, n. 1 (febbraio 1985): 249–51. http://dx.doi.org/10.1017/s0021859600043227.
Testo completoAbstract (sommario):
Rice is the major food crop grown on black soils of southern India and these soils have problems of high zinc fixation due to high clay content, high pH and dominance of smectite minerals causing zinc deficiency problems. The addition of zinc fertilizers to these soils has often been ineffective as the element is transformed to unavailable forms particularly under flooded rice conditions. Studies on the distribution of fertilizer zinc among different pools of soil zinc (Viets, 1962) could be useful in formulating methods of zinc application for higher efficiency of utilization. An attempt was therefore made to study the transformations of added zinc in soils in field experiments conducted in a rice-rice sequence involving the use of 65Zn as a tracer.
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Haddad, KS, e RG Weir. "Influence of soil properties on the use of soil and plant zinc to predict zinc response in maize". Australian Journal of Experimental Agriculture 25, n. 4 (1985): 856. http://dx.doi.org/10.1071/ea9850856.
Testo completoAbstract (sommario):
The value of using the diethylenetriaminepentaacetic acid (DTPA) soil zinc and/or the zinc concentration in young maize tops to predict the response, to zinc application, of maize growth on soils from the Liverpool Plains of New South Wales was assessed in a glasshouse experiment. Forty-eight composite soil samples, 23 medium clays (MC) and 25 heavy clays (HC), were collected from the study area and two rates of zinc (0 and 10 �g/g air-dried soil), were applied to each soil in a triplicated randomized block design. Maize was grown for 30 days and the growth response to zinc application was calculated as Bray's percentage yield (%y). Although zinc application generally increased the yield of maize grown on all soils tested (P<0.001), the correlations between %y and soil zinc, plant zinc and soil zinc, and %y and plant zinc of all soils tested, as one group, were not significant. When the soils were treated as two textural groups and the influence of other soil properties on the growth response of maize to zinc application were tested statistically, the %y differed between the MC and HC groups (P<0.05) and between the soils in each group (P<0.001). The multiple regression of %y on soil properties, within each soil group, revealed that, for the MC soils, the phosphorus content, DTPA extractable iron, manganese and zinc, percentage organic carbon and phosphorus sorption capacity were consistently and significantly related to %y and accounted for 93% of variation in %y. For the HC soils, only pH, DTPA-extractable manganese and percentage organic carbon were significantly related to %y and these accounted for 75% of the variation in %y. Zinc concentration in maize tops grown on the untreated soils was 12-40 �g/g. The %y was significantly (P<t0.05) related to zinc concentration in the tops of maize grown on the MC soils (r= 0.63), but not in those grown on the HC soils. These results suggest that, for maize grown in these soils, it is not possible to predict the response to zinc application by considering only zinc levels in soil or in young maize tops.
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M. L. Bubarai, Bapetel, e A. M. Tahir N. A. Abdulkadir. "Levels of Available Zinc in Soil of Teaching and Research Farm Modibbo Adama University, Yola, North East Nigeria". International Journal of Current Microbiology and Applied Sciences 10, n. 9 (10 settembre 2021): 448–55. http://dx.doi.org/10.20546/ijcmas.2021.1009.052.
Testo completoAbstract (sommario):
A study was conducted to assess the status of available zinc in soil of Teaching and Research Farm, Modibbo Adama University, Yola North East, Nigeria. Ten soil samples were collected from 0 – 20 and 20 – 50 cm depths to reflect the soil of the study area. The soils were analysed following standard laboratory procedures. Result obtained showed that the soils were sandy loam to sandy clay loam, slightly acidic (mean = 6.4 – surface; 6.5 – subsurface soils), very low OC content (mean = 0.35 % – surface; 0.27 % – subsurface soils), low to medium Total N and exchangeable bases. Zinc was generally low to medium (range = 0.18 – 1.71; mean = 1.12 % in surface soils, and range = 0.32 – 2.71; mean = 1.35 % in subsurface soils). Zinc is not correlated with most of the soil properties in both soil depths. In surface soil, a positively correlation with potassium (r = 0.702*) was observed and negative correlation with Total N (r = -0.634*) in subsurface soils. It is recommended that for successful and profitable crop production, application of inorganic fertilizers plus zinc and organic material should be encouraged.
Tesi sul tema "Soils Zinc content"
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PULS, ROBERT WILLIAM. "ADSORPTION OF HEAVY METALS ON SOIL CLAYS (KAOLINITE, CADMIUM, MONTMORILLONITE, ZINC)". Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183889.
Testo completoAbstract (sommario):
Metal cation adsorption is the predominant chemical mechanism governing the attenuation of toxic metal movement in soils. Clay minerals are the primary adsorbent surfaces in soils due to their ubiquitous nature and large reactive surface area. This study examined the relative affinity of the metals cadmium, nickel and zinc for the clay minerals kaolinite and montmorillonite. The influence which different mineral adsorbents and different complexing ligands in solution have on the adsorption of metal ions was assessed using the Hard-Soft Acid-Base Principle as a theoretical framework for predicting the maximum extent of adsorption and rate of adsorption. The HSAB principle is that hard bases prefer to complex hard acids and soft bases prefer to complex soft acids. The hypothesis that initiated these investigations was that the hard-soft character of mineral surfaces is due to their surface functional groups and can be measured using metal cation adsorption selectivity experiments where pH and complex ion formation are controlled. When complex ion formation in aqueous solution was minimized (i.e. in Ca(ClO₄)₂), adsorption decreased in the order of decreasing softness, CD > Zn > Ni for both clay minerals. Montmorillonite behaved as a slightly harder Lewis base than kaolinite, sorbing the harder Ni and Zn ions to a greater extent than Cd, although both minerals behaved as soft Lewis bases. In the presence of chloride and sulfate ligands, adsorption sequences changed and reflected results from typical soil solution studies. In some cases the adsorption sequences can be explained using the HSAB principle together with computer speciation data and this approach merits further consideration and research. Adsorption over time and calculated adsorption rate constants were generally consistent with equilibrium selectivity data. Adsorption rates decreased in the order Cd > Zn > Ni in Ca(ClO₄)₂ for both clay minerals. The adsorption curves reflect a two-step adsorption process involving a rapid exchange-type reaction followed by a much slower adsorption involving diffusion into the crystal or alteration of the surface through the formation of a new solid phase involving the adsorbed ions.
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Wijesundara, Chandra. "Response of corn to high levels of CuSO₄ and ZnSO₄ applications". Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45959.
Testo completoAbstract (sommario):
High levels of Cu and Zn application to agricultural soils are considered to pose a potential hazard to plants and animals. The levels of Cu and Zn which can be safely added to cropland have yet to be established. This study was conducted on a Davidson silty clay (Rhodic Paleudult) to determine the response of corn (Zea mays L.) to cumulative application of up to 469 kg Cu and 1032 kg Zn ha⁻¹ as sulfates over the 22-year period from 1967 through 1988. Neither corn grain nor silage yield was affected by the metal additions even though the cumulative amount of Cu and Zn added exceeded the maximum allowable Cu and Zn loading rates based on the U.S. Environmental Protection Agency guidelines (i.e., 250 kg Cu and 560 kg Zn ha⁻¹) for this soil. The twenty-first annual application of Cu as CuSO₄, increased Cu concentrations in ear leaves. However, Cu concentrations in ear leaves were unaffected by the twenty-second year of Cu application. Concentrations of Zn in ear leaves were increased by the high level of Zn application during the two years of the study. Twenty-first year Cu and Zn concentrations in com grain were not increased by the high levels of Cu and Zn sulfates. All grain and ear leaf Cu and Zn concentrations were within the normal ranges from the high amount of metal application. The DTPA extractable Cu and Zn in the soil increased with an increase in level of applied Cu and Zn. More Cu and Zn were extracted from the soil by the Mehlich-3 method than by the DTPA method. This higher rate of extraction was attributed to the ethylenediaminetetraacetic acid (EDTA) in the Mehlich-3 solution.Master of Science
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Neilsen, Denise. "Characterization and plant availability of zinc in British Columbia orchard soils". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72835.
Testo completo
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Owojori, Olugbenga J. (Olugbenga John). "Influence of clay content and salinity on the bioavailability and toxicity of metals (copper and zinc) to soil organisms". Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1484.
Testo completoAbstract (sommario):
Thesis (PhD (Botany and Zoology))—University of Stellenbosch, 2009.ENGLISH ABSTRACT: Metal pollution is a problem of increasing global concern. It could arise from industrial activities, as well as pesticide use in agriculture, among other sources. For adequate protection of the soil ecosystem from metal toxicity, the bioavailability of metals must be properly evaluated. A plethora of soil factors affect the bioavailability of metals to soil organisms. These include pH, clay and organic matter contents, salinity among others. While much is known about the influence of some of these parameters, little is known on how clay content and salinity modify the bioavailability of metals to soil organisms. This study investigated the influence of clay content and salinity on partitioning, uptake and toxicity of two essential metals (Cu and Zn) to the earthworm Eisenia fetida in separate laboratory trials. Partitioning of the metals was evaluated with 0.01 M CaCl2, DTPA (di-ethylene-triamine-penta acetic acid), and nitric acid extractions. The metal content of worms was determined by acid digestion, while growth, cocoon production, and mortality were used as endpoints showing toxicity to metals and/or salinity. To test the validity of some of the laboratory results, a field study was undertaken, using the earthworm Aporrectodea caliginosa. Further, the study assessed the effect of salinity, using a battery of laboratory tests (acute, chronic and avoidance tests) with natural and/or artificial soils on four species of organisms (a collembolan Folsomia candida, a potworm Enchytraeus doerjesi and two earthworm species E. fetida and A. caliginosa), representing different feeding patterns and ecological roles in soil. Results showed that with increased clay content, there was increased availability of Cu in the substrate, and increased toxicity to E. fetida as shown by data for mortality and growth. The situation with Zn was less significant at sub-lethal concentrations but much so at lethal concentrations. DTPA and CaCl2 extracted metals revealed changes in partitioning of Cu and Zn with changes in clay content, but this trend was not always consistent. Both DTPA and CaCl2 revealed increased availability of Zn in substrates with increased salinity. Salinity had an additive to synergistic effect with Zn in toxicity to E. fetida. When combined with Cu, salinity also increased the availability of Cu as shown by CaCl2 extracted fraction, and had additive effect on toxicity of Cu to the earthworm. The field study did not succeed in in iv confirming the results of the laboratory study due to confounding role of flooding after heavy rainfall and subsequent leaching of salts and Cu. The results of the experiment on acute and chronic toxicity tests for NaCl on E. fetida showed LC50 of 5436 mg/kg NaCl and EC50 for growth and cocoon production of 4985 and 2020 mg/kg NaCl. These values showed that earthworms might be negatively affected in many soils containing fairly moderate concentrations of salts. Similarly, A. caliginosa could not survive in natural soil containing relatively low salt concentrations (EC = 1.62 dS/m) while reproduction was severely affected at lower EC value of 0.52 dS/m. F. candida and E. doerjesi could survive in the highest salinity soil (EC = 1.62 dS/m) used in this study but their reproduction was severely affected from 1.03 dS/m. Overall, it appears that of all the taxa used, earthworm species were the most sensitive to saline stress and could proof useful in determining ‘safe levels’ of salt in contaminated soils. The results of the avoidance test showed that A. caliginosa avoided both natural and artificial saline soil containing concentrations lower than those avoided by E. fetida. The conclusion is that the influence of clay content and salinity on the bioavailability of Cu and Zn depends largely on the metal in question, but generally speaking, bioavailability and toxicity of the metals were reduced with increased clay content while the opposite was true for salinity. If the species used in this study can be seen as fairly representative of a wide range of soil organisms, the conclusion is that salinisation of soil will be detrimental to most soil organisms at relatively low saline concentrations. Given the role of beneficial soil organisms in several soil processes which in turn contribute to soil fertility and sustainable use of land, it is recommended that any farming practices that may lead to an increase in salt content of agricultural soils should be discouraged.
AFRIKAANSE OPSOMMING: Metaalbesoedeling is ‘n probleem wat toenemende globale kommer veroorsaak. Dit kan ontstaan as gevolg van industriële aktiwiteite sowel as van plaagmiddelgebruik in die landbou en ander bronne.Ten einde die grondekostelsel genoegsaam te beskerm, moet die biobeskikbaarheid van metale ge-evalueer word. ‘n Verskeidenheid van grondfaktore be-invloed die biobeskikbaarheid van metale vir grondorganismes Hulle sluit onder andere in pH, klei, organiese inhoud en soutgehalte. Hoewel heelwat bekend is oor die rol van sommige van hierdie parameters, is min bekend oor hoe klei en soutgehalte die biobeskikbaarheid van metale vir grondorganismes kan modifieer. Hierdie studie het die invloed van kleiinhoud and soutgehalte op die verdeling/partisie, opname en toksisiteit van twee essensiële metale (Cu en Zn) vir die erdwurm Eisenia fetida in afsonderlike laboratoriumproewe ondersoek. Kompartementele verdeling van die metale is geevalueer deur middel van ekstraksie-metodes met 0.01 M CaCl2, DTPA (di-etileentriamien- penta asysnsuur), en salpertersuur ekstraksies. Die metaalinhoud van wurms is bepaal deur suurverterings en spektrofotometriese analises te doen terwyl groei, kokonproduksie en mortaliteit van organismes gebruik is as gevoeligheidseindpunte om toksisiteit van metale en soutgehalte aan te toon. Om die geldigheid van somige van die laboratoriumresultate te toets, is ‘n veldstudie ook onderneem met die erdwurm Aporrectodea caliginosa. Die effek van soutgehalte is verder ondersoek deur ‘n battery van laboratoriumtoetse met vier spesies (‘n kollembool Folsomia candida,’n potwurm Enchytraeus doerjesi en twee erdwurmspesies E. fetida en A. caliginosa), wat verskillende voedingspatrone verteenwoordig. Die resultate het getoon dat met toenmende klei-inhoud was daar ‘n toename in die beskikbaarheid van Cu vir opname vanuit die substraat, asook ‘n toename in toksisiteit vir E. fetida soos deur die gegewens vir mortaliteit en groei uitgewys. Die situasie met Zn was minder betekenisvol by subletale konsentrasies en selfs baie minder so by letale konsentrasies. DTPA en CaCl2 ge-ekstraheerde metale het veranderinge in die partisie/verdeling van Cu en Zn uitgewys met verandering in klei-inhoud, maar die tendens was nie altyd konstant nie. Beide DTPA en CaCl2 ekstraksie het toenemende beskikbaarheid van Zn in substrate uitgewys met toenemende soutinhoud. Soutinhoud het ‘n additiewe/toegevoegde tot sinergistiese vi toksisiteitseffek saam met Zn vir E. fetida. In kombinasie met Cu het soutgehalte ook die geskatte biobeskikbaarheid van Cu verhoog soos uitgewys deur die CaCl2, geekstraheerde fraksie, en het ‘n additiewe effek gehad op die toksisitiet van Cu vir die erdwurm. Die veldstudie kon nie die resultate van die laboratoriumstudie bevestig nie weens die belemmerende rol van vloede na swaar reënneerslae en daaropvolgende uitloging van soute en Cu. Die resultate van die eksperimentele ondersoek na die akute en chroniese effekte van NaCl op E. fetida het ‘n LC50 van 5436 mg/kg NaCl en EC50 vir groei en kokonproduksie van 4985 en 2020 mg/kg NaCl opgelewer. Hierdie waardes het aangetoon dat erdwurms moontlik negatief beinvloed kan word in baie gronde wat ‘n redelike gemiddelde konsentrasie van soute bevat. Soortgelyk kon A. caliginosa nie oorleef in natuurllike grond wat relatief lae soutkonsentrasies bevat het (EC=1.62 dS/m) nie terwyl voortplanting sterk ge-affekteer is by ‘n lae EC waarde van 0.52 dS/m. F. candida en E. doerjesi kon oorleef in die grond met die hoogste soutgehalte (EC= 1.62 dS/m) maar hulle voortplanting is ernstig geknou vanaf 1.03 dS/m. In geheel blyk dit dat van allle taksa wat gebruik is, erdwurms die sensitiefste was vir die stres wat deur soutgehalte veroorsaak is. Die kennis kan nuttig wees in die bepaling van “veilige vlakke” van sout in gekontamineerde gronde. Die resultate van die vermydingstoetse het getoon dat A. caliginosa beide natuurlike en kunsmatig versoute gronde vermy het by konsentrasies wat heelwat laer was as dié wat deur E. fetida vermy is Die gevolgtrekking is dat die invloed van klei en soutgehalte op die biobeskikbaarheid van Cu en Zn grootliks afhanklik is van die metale wat betrokke is en dat biobeskikbaarheid en toksisiteit normaalweg verminder het met verhoogde klei-inhoud, met die teenoorgestelde wat waar was in die geval van soutgehalte. Indien die spesies wat in die studie gebruik is beskou kan word as redelik verteenwoordigend van ‘n wye reeks van grondorganismes, is die gevolgtrekking dat versouting van gronde nadelig sal wees vir meeste grondorganismes, selfs by relatief lae soutkonsentrasies. In die lig van die rol wat nuttige grondorganismes speel in verskeie grondprosesse wat bydraend is tot grondvrugbaarheid en volhoubare gebruik van gronde, word dit aanbeveel dat enige boerderypraktyk wat mag lei tot verhoging van die soutinhoud van landbougronde ontmoedig moet word.
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Fotovat, Amir. "Chemistry of indigenous Zn and Cu in the soil-water system : alkaline sodic and acidic soils". Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phf761.pdf.
Testo completoAbstract (sommario):
Copies of author's previously published articles inserted. Bibliography: leaves 195-230. In this study the soil aqueous phase chemistry of Zn and Cu in alkaline sodic soils are investigated. The chemistry of trace metal ions at indigenous concentrations in alkaline sodic soils are reported. Metal ions at low concentrations are measured by the graphite furnace atomic absorption spectrometry (GFAAS) technique.
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Ramesh, Sunita. "Molecular mechanism of zinc uptake and regulation in cereals". Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phr1724.pdf.
Testo completoAbstract (sommario):
Bibliography: leaves 174-204. "This work provides a starting point for understanding the molecular mechanisms of zinc uptake and the regulation of zinc transport in cereals. Zinc efficient cereals would yield more on soild with low zinc and could potentially result in increased zinc content grain."
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Singbo, Arnaud. "The effect of zinc and soil ph on grain yield and nutrient concentrations in spring wheat cultivated on potted soil". Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2845.
Testo completoAbstract (sommario):
Thesis (MTech (Agriculture))--Cape Peninsula University of Technology, 2018.Zinc deficiency on various soil types have been reported in arable soils of sub Saharan Africa (SSA) including South Africa. A pot trial was conducted at the Cape Peninsula University of Technology, Wellington campus to investigate the interaction of different application rates of Zn at various soil pH on the grain yield and quality of spring wheat in a completely randomized factorial design replicated three times. The four soil pH tested were: pHA: 5.1, pHB: 5.6, pHC: 6.1, pHD: 6.6 which correspond to lime application at 0, 0.5, 1 and 1.5 t/ha. Five Zn rates (Zn1: 3.5; Zn2: 4.5; Zn3: 5.5 Zn4: 6.5, and Zn5: 7.5 mg /kg soil which correspond to Zn1: 7; Zn2: 9; Zn3: 11; Zn4: 13 and Zn5: 15 kg /ha) were applied at two (planting and flowering) growth stages. Yield and yield component data collected were analyzed using SAS version 9.2 and means were separated by Duncun’s Multiple Range Test (DMRT). The results showed that grain yield and yield components were significantly affected by lime application pHC (6.1): 1t/ha at planting. Zn application at planting had no significant effect on the grain yield and yield components. However, at flowering, the simultaneous increase of Zn along with increase in lime positively affected grain yield and yield components. Plant analysis showed that at both stages (planting and flowering), Zn application, especially at pH 6.6, significantly increased P, K, Ca, Na, Mg Fe, Cu and B concentrations in wheat grain, but the concentrations of N, Mn, Zn and protein remained unaffected. Zn application had no effect on most nutrients due to the presence of lime. While the absence of lime, Zn4: 6.5mg/kg (corresponding to 13kg/ha) significantly increased the nutrients. In addition, Zn3: 5.5mg/kg (corresponding to 11kg/ha) promoted Zn absorption by grain in all treatments.
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Gettier, Stacy W. "Corn response to long-term application of CuSO₄, ZnSO₄ and Cu-enriched pig manure". Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49779.
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Henshel, Judy 1958. "Copper, manganese, and zinc in Puerco River sediments". Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276725.
Testo completoAbstract (sommario):
A study was conducted to test for the presence of heavy metals (Cu, Mn, and Zn) in surface sediments of the Puerco River channel in the aftermath of a toxic spill in 1979 near Church Rock, New Mexico. Analysis of samples from five sites downstream from the spill showed that these substances were not present in unusually large amounts, though an increasing gradient of metal concentration with distance downstream was revealed. Statistical analysis revealed the Cu, Mn, and Zn were associated with clay and silt, soil organic matter, organic carbon, and carbonates, all of which existed as extraneous, uncontrolled variables. Adjusted metal concentrations, obtained with covariate analyses, confirmed the increasing gradient downstream. Clay and silt also increased downstream. Some toxic substances may have leached into the riverbed; possible mechanisms for this process are also discussed and further study to substantiate or disprove this hypothesis is recommended.
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Wheal, Matthew Simon. "The influence of chlorsulfuron on the uptake and utilization of zinc by wheat /". Title page, table of contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phw556.pdf.
Testo completoLibri sul tema "Soils Zinc content"
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Gibb, James P. Retention of zinc, cadmium, copper, and lead by geologic materials. Cincinnati, OH: U.S. Environmental Protection Agency, Hazardous Waste Engineering Research Laboratory, 1987.
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International Symposium on "Zinc in Soils and Plants" (1993 University of Western Australia). Zinc in soils and plants: Proceedings of the International Symposium on "Zinc in Soils and Plants," held at the University of Western Australia, 27-28 September, 1993. Dordrecht: Kluwer Academic Publishers, 1993.
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Cabała, Jerzy. Metale ciężkie w środowisku glebowym olkuskiego rejonu eksploatacji rud Zn-Pb. Katowice: Wydawn. Uniwersytetu Śląskiego, 2009.
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Chudzińska, Ewa. Genetic diversity of Scots pine (Pinus sylvestris L.) as an expression of adaptation to heavy industrial pollution: A case study of the population from Miasteczko Śląskie = Zróżnicowanie genetycne sosny zwyczajnej (Pinus sylvestris L.) jako wyraz adaptacji do silnych zanieczyszczeń przemysłowych : na przykładzie populacji z Miasteczka Śląskiego. Poznań: Wydawnictwo Naukowe UAM, 2013.
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Greulich, Peter. Schwermetalle in Fichten und Böden im Burgwald (Hessen): Untersuchungen zur räumlichen Variabilität der Elemente Blei, Cadmium, Nickel, Zink, Calcium und Magnesium, unter besonderer Berücksichtigung des Reliefeinflusses. Marburg/Lahn: Im Selbtsverlag der Marburger Geographischen Gesellschaft, 1988.
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Zachara, John Michael. A solution chemistry and electron spectroscopic study of zinc adsorption and precipitation on calcite. 1987.
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Cold Regions Research and Engineering Laboratory (U.S.), a cura di. Effectiveness and variability of digestion procedures for zinc determination in aged, contaminated soils. Hanover, N.H: U.S. Army Corps of Engineers, Cold Regions Research & Engineering Laboratory, 1992.
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Boening, Dean W. Evaluation of an automated respiration method used in assessing the toxicity of zinc on soil microorganisms. 1992.
Cerca il testo completoCapitoli di libri sul tema "Soils Zinc content"
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Yilmaz, A., H. Ekiz, I. Gültekin, B. Torun, S. Karanlik e I. Cakmak. "Effect of seed zinc content on grain yield and zinc concentration of wheat grown in zinc-deficient calcareous soils". In Plant Nutrition for Sustainable Food Production and Environment, 283–84. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0047-9_82.
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Semenova, Irina N., Yuliya S. Rafikova, Rezeda F. Khasanova e Yalil T. Suyundukov. "Heavy Metal Content in Soils and Hair of the Inhabitants Near Copper Zinc Mine (Bashkortostan, Russia)". In Lecture Notes in Earth System Sciences, 847–62. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21614-6_45.
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Hattori, H., e M. Chino. "Growth, cadmium, and zinc contents of wheat grown on various soils enriched with cadmium and zinc". In Plant Nutrition, 462–63. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_223.
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Kumar, Uttam, Nirmal Kumar, V. N. Mishra e R. K. Jena. "Soil Quality Assessment Using Analytic Hierarchy Process (AHP)". In Interdisciplinary Approaches to Information Systems and Software Engineering, 1–18. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7784-3.ch001.
Testo completoAbstract (sommario):
Fields with rice-based cropping systems are unique from other wetland or upland soils because they are associated with frequent cycling between wetting and drying under anaerobic and aerobic conditions. This alters the C and N transformations, microbial activities and their diversity, and soil physical properties, depending on the other crop in rotation with rice. This chapter aims to compare the soil quality of vertisols of central plains of Chhattisgarh under rice-wheat and rice-chickpea cropping systems. Soil quality index was developed using analytical hierarchy process (AHP). Five soil quality indicators were selected under minimum datasets including soil organic carbon, mean weight diameter, available water content, available phosphorous and zinc. The results indicated that the rice-chickpea cropping system shows improved soil quality than that of rice-wheat cropping system.
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Dalton, David R. "The Soil". In The Chemistry of Wine. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190687199.003.0012.
Testo completoAbstract (sommario):
The widespread practices of viniculture (the study of production of grapes for wine) and oenology (the study of winemaking) affirm the generalization that grapevines have fewer problems with mineral deficiency than many other crops. Only occasionally is the addition of iron (Fe), phosphorus (P), magnesium (Mg), and manganese (Mn) supplements to the soil needed. Addition of potassium (K), zinc (Zn), and boron (B) to the soil is more common. And, of course, nitrogen (N) is critical for the production of proteins. Over the years, various transition metals (metals in groups three through twelve [3– 12] of the periodic table, Appendix 1) have been shown to be generally important. These groups include iron (Fe), magnesium (Mg), manganese (Mn), zinc (Zn), and copper (Cu). Many metals are bound to organic molecules that are important for life. Some of the metals, such as copper (Cu) and iron (Fe), are important in electron transport while others, including manganese (Mn) and iron (Fe), inhibit reactive oxygen (O) species (ROSs) that can destroy cells. Metals serve both to cause some reactions to speed up, called positive catalysis while caus¬ing others (e.g., unwanted oxidation) to slow down (negative catalysis). It is not uncommon to add nitrogen (N), in the form of ammonium salts such as ammonium nitrate (NH4NO3), as fertilizer to the soil in which the vines are growing. It is also common to increase the nitrogen (N) content in the soil by planting legumes (legumes have roots that are frequently colonized by nitrogen-fixing bacteria). Nitrogen- fixing bacteria convert atmospheric nitrogen (N2), which plants cannot use, to forms, such as ammonia (NH3) or its equivalent, capable of absorption by plants. Nitrogen, used in plant proteins, tends to remain in the soil after harvest or decomposition. With sufficient nitrogen present in the soil the growth cycle can begin again in the following season without adding too much fertilizer. In a more general sense, however, it is clear (as mentioned earlier) that the soil must be capable of good drainage so the sub-soil parts of the plant do not rot and it must be loose enough to permit oxygen to be available to the growing roots.
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Rama Jyothi, Narjala. "Heavy Metal Sources and Their Effects on Human Health". In Heavy Metals - Their Environmental Impacts and Mitigation [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.95370.
Testo completoAbstract (sommario):
Heavy metals are defined in many ways, based on various factors such as density and atomic weight. Some of the heavy metals are essential as nutrients for humans such as iron, cobalt and, zinc in small quantities but are toxic in higher quantities. But few metals, such as lead, cadmium and, mercury are poisonous even in small quantities. The toxicity of heavy metals is depending on concentration,period of exposure and route of exposure. Heavy metal exposure takes place on human beings through inhalation from the atmosphere, intake through drinking water and, ingestion through the skin by dermal contact. The present chapter describes the definition of heavy metals, sources of these heavy metals, toxicity and, their impact on various environmental segments, such as air, water and, soil.
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Rama Jyothi, Narjala. "Heavy Metal Sources and Their Effects on Human Health". In Heavy Metals - Their Environmental Impacts and Mitigation [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.95370.
Testo completoAbstract (sommario):
Heavy metals are defined in many ways, based on various factors such as density and atomic weight. Some of the heavy metals are essential as nutrients for humans such as iron, cobalt and, zinc in small quantities but are toxic in higher quantities. But few metals, such as lead, cadmium and, mercury are poisonous even in small quantities. The toxicity of heavy metals is depending on concentration,period of exposure and route of exposure. Heavy metal exposure takes place on human beings through inhalation from the atmosphere, intake through drinking water and, ingestion through the skin by dermal contact. The present chapter describes the definition of heavy metals, sources of these heavy metals, toxicity and, their impact on various environmental segments, such as air, water and, soil.
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Massa Ismaël, Bamba, e Sorho Siaka. "The Toxicity of Environmental Pollutants". In The Toxicity of Environmental Pollutants. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.104088.
Testo completoAbstract (sommario):
In view of the growing threat of trace metals to human health, this work set itself the objective of documenting the toxicity of the trace metals most in contact with humans on human health through food. Thus, this study revealed that organic matter, pH and CEC are the main soil parameters that influence the passage of trace metals from soil to plants. The study also revealed that agriculture, industry and road traffic contribute greatly to the input of trace metals into the environment. Regarding the mechanisms of toxicity, the study showed that chromium VI and copper manifested their toxicity by the formation of free radicals after reduction, those of zinc, nickel, manganese and nickel resulting from the disfunctioning of homeostasis. The study showed that lead caused toxic effects by replacing certain cations such as Ca2+, Mg2+, Fe2+, Na+ which have important functions in the cell. Cadmium expresses its toxicity by binding to albumin, thus altering the homeostasis of metals such as calcium. All these mechanisms have revealed both acute and chronic toxic effects.
Atti di convegni sul tema "Soils Zinc content"
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Utkin A.A., Utkin A. A. "TRACE ELEMENTS AND SULFUR IN THE SOILS OF REFERENCE SITES OF THE VLADIMIR REGION". In Agrobiotechnology-2021. Publishing house of RGAU - MSHA, 2021. http://dx.doi.org/10.26897/978-5-9675-1855-3-2021-55.
Testo completoAbstract (sommario):
It was determined that the studied soils had a high and very high availability of mobile boron, zinc, copper and low – molybdenum and sulfur. The average content of boron, zinc and copper increased during the observation period, and sulfur decreased.
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Gorbunova, Nadezhda, Arkadi Gromovik, E. Zaharova, A. Safonova e D. Davydova. "INFLUENCE OF GRAIN STRAW ON THE CONTENT OF ZINC AND COPPER IN LEACHED CHERNOZEMS OF THE RAMON DISTRICT OF THE VORONEZH REGION". In Reproduction, monitoring and protection of natural, natural-anthropogenic and anthropogenic landscapes. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2022. http://dx.doi.org/10.34220/rmpnnaal2021_63-67.
Testo completoAbstract (sommario):
The influence of the introduction of grain straw and cellulosolytic micromycete on the seasonal dynamics of exchangeable compounds of zinc and copper under the conditions of a multifactorial field experiment on leached chernozems was studied. It is shown that straw, with a lack of other fertilizers, is able to replace them, enriching the soil with valuable organic substances. The results obtained indicate that the introduction of green manure significantly increases the content of exchangeable compounds Zn and Cu, especially when a cellulolytic micromycete is added to the straw, which accelerates its decomposition. There is a decrease in the amount of exchangeable Zn and Cu compounds by the end of the growing season, due to their intensive consumption by plants. The data obtained indicate the absence of contamination of the studied soils with elements, on the contrary, they note the lack of exchangeable Zn and Cu compounds.
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Ghani, M., S. V. Slycken, E. Meers, F. M. G. Tack, F. Naz e S. Ali. "Enhanced Phytoextraction of Cadmium and Zinc Using Rapeseed". In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96362.
Testo completoAbstract (sommario):
In a green house pot experiment, the effects of three amendments, sulphur (S), ammonium sulphate ((NH4)2SO4) and ethylenediaminetetracetic acid (EDTA) were tested for phytoextraction of Cd and Zn by rapeseed (Brassica napus L.). Elemental sulphur was applied as 20.00, 60.00, and 120.00 mg.kg−1 soil. EDTA was tested at a dose of 585.00 mg.kg−1 soil, and (NH4)2SO4) at a rate of 0.23 mg.kg−1 soil. All treatments received a base fertilization (Hogland) before sowing. Plants were harvested after 51 days of growth and shoot dry matter and soil samples were analysed for metal contents. All amendments caused a significant increase in Cd and Zn contents in plant shoots of all treatments than control treatment. Further, EDTA was most effective for extraction metals concentrations in shoot biomass but the plants showed significant signs of toxicity and yield were severely depressed. The addition of sulfur favorably influenced plant biomass production. The fertilized ammonium sulfate treatment resulted in the highest phytoextraction of Cd and Zn and the amounts of these metals accumulated in plant shoot exceeded by a factor of 4 and 3 respectively. Finally, Brassica napus could be used for soil remediation keeping its other uses which will make the contaminated site income generating source for the farmers.
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Cao, H. C., e X. P. Zhang. "Spatial distribution of copper, lead and zinc contents in farmland soil in suburb of Harbin". In 2010 International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2010. http://dx.doi.org/10.1109/mace.2010.5535967.
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PEKARSKAS, Juozas, Algirdas GAVENAUSKAS, Anželika DAUTARTĖ e Aida STIKLIENĖ. "RECYCLING OF MINERAL SERPENTINITE WASTE FROM MINING INDUSTRY AND ITS USE IN AGRICULTURE TO IMPROVE SOIL AGROCHEMICAL PROPERTIES". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.102.
Testo completoAbstract (sommario):
The influence of processing the serpentinite quarry from the Caucasian mountains at the foot of the Mount Elbrus crushed waste on soil agrochemical properties, phytotoxicity of spring barley, influence on barley plant biomass and its chemical composition were investigated. Ground and granular serpentinite had a different effect on soil and plants. Application of serpentinite fertilizers significantly increased the content of calcium, iron, 227.95-376.75 and 5.05-9.62 mg kg-1, total and plant-derived magnesium 0.34-0.52 and 1.19-2.16 mg kg-1, lead and nickel, while the amount of copper dropped substantially; the soil was becoming more alkaline. Application of ground serpentinite lead to alkalizing of the soil much more compared to the granular, with a significant increase in plant-derived magnesium. The influence of serpentinite increased the yield of spring barley plants in green and dry mass by 0.049-0.256 and 0.011-0.046 g or 0.65-3.41 and 1.19-2.59% out of the growing vessel, and dry matter increased by 0.12-0.26 % units, the yield of spring barley green and dry mass under the influence of ground serpentinite was higher than of granular serpentinite fertilizer, and the dry matter was found to be significantly higher than that of unfertilized spring barley plants. Ground and granular serpentinite was not phytotoxic to spring barley. An application of ground serpentinite increased an amount of calcium, potassium and magnesium in the barley dry matter compared to the granular serpentinite. Ground and granular serpentinite reduced the amount of trace elements copper and manganese in the dry mass of the plant, and the amount of zinc decreased only after fertilization with granular serpentinite. An application of serpentinite significantly decreased content of lead, chrome and cadmium while nickel content significantly increased in the dry matter of barley plants.
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Siripornadulsil, Surasak, e Wilailak Siripornadulsil. "Characterization of Cadmium-Resistant Bacteria and Their Application for Cadmium Bioremediation". In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16072.
Testo completoAbstract (sommario):
On a global basis, trace-metal pollution is one of the most pervasive environmental problems. It is particularly difficult to prevent or clean up because the metals are toxic in their elemental form and cannot be decomposed. Bioremediation has been shown to be a powerful system for heavy metal pollution clean up and prevention. In this work, we characterized the cadmium (Cd)-resistant bacteria isolated from rice field soil downstream from zinc (Zn) mineralized area which the owners were contaminated at high level of cadmium content in their blood (>10 μgCd/g creatinine). We found that all 24 isolated bacteria tolerated toxic Cd concentrations (2,500 μM). In order to determine whether the Cd toxicity affected the growth of isolated bacteria, we grew the isolated bacterial cells in the absence and presence of toxic concentrations of CdCl2 (500 μM). In the absence of Cd, all isolated bacterial cells grew slightly better than in the presence of toxic concentrations of Cd. In addition, the Cd binding capacity of all isolated bacteria were very high, ranging from 6.38 to 9.38 log[Cd(atom)]/cell when grown in the presence of 500 μM CdCl2. Furthermore, the stability of Cd-bacteria complex of all isolated bacteria was affected by 1mM EDTA. When grown in the presence of 500 μM CdCl2, Cd-resistant isolates S2500-6, -8, -9, -15, -17, -18, -19, and -22 increasingly produced proteins containing cysteine (SH-group) (from 1.3 to 2.2 times) as well as 11 isolates of Cd-resistant bacteria, including S2500-1, -2, -3, -5, -6, -8, -9, -11, -16, -20, and -21, increasingly produced inorganic sulfide (1.5 to 4.7 times). Furthermore, the Sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy studies indicated that Cd-resistant isolated S2500-3 precipitated amounts of cadmium sulfide (CdS), when grown in the presence of 500 μM CdCl2. The results suggested that these Cd-resistant bacteria have potential ability to precipitate a toxic soluble CdCl2 as nontoxic insoluble CdS. Interestingly, Cd-resistant bacteria isolated S2500-3, -8, -9,and -20 increased cadmium tolerance of Thai jasmine rice (Kao Hom Mali 105) when grown in the presence of 200 μM CdCl2. These 4 isolates also decreased cadmium concentration accumulation in Kao Hom Mali 105 plant at 61, 9, 6, and 17%, respectively when grown in the presence of 200 μM CdCl2. They were identified by 16S rDNA sequence analysis and classified as Cupriavidus taiwanensis (isolate S2500-3) and Pseudomonas aeruginosa (isolates S2500-8, -9, and -20).
Rapporti di organizzazioni sul tema "Soils Zinc content"
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Савосько, Василь Миколайович, Юлія Віліївна Бєлик, Юрій Васильович Лихолат, Герман Хайльмейер, Іван Панасович Григорюк, Ніна Олександрівна Хромих e Тетяна Юріївна Лихолат. The Total Content of Macronutrients and Heavy Metals in the Soil on Devastated Lands at Kryvyi Rih Iron Mining & Metallurgical District (Ukraine). Geology-dnu-dp.ua, 2021. http://dx.doi.org/10.31812/123456789/4286.
Testo completoAbstract (sommario):
The relevance of the research is due to the need to develop technologies for phytoremediation of the devastated lands in the mining and metallurgical regions of Ukraine and the world. In this regard, the creation of tree plantations adapted to the ecological conditions of such territories is considered by many experts as the most promising option for innovative technologies. However, the development of artificial woodlands requires knowledge of the pedogeochemical character- istics of devastated lands. The aim of the work was to carry out a comparative analysis of the macronutrients and heavy metals gross forms content in the soils of the devastated lands of the Kryvyi Rih mining and metallurgical region. The field studies focused on five contrasting monitoring sites of the Petrovsky dump (Central Kryvorizhzhya), which has a typical age and composition of rocks for the region. Soil sampling, drying, sieving, and sample preparation (sintering in a muffle furnace) were done in accordance with classical techniques. The concentrations of macronutrients (potassium, sodium, calcium, magnesium, sulfur, and phosphorus) and heavy metals (iron, manganese, zinc, copper, lead, and cadmium) were determined using an Inductively Coupled Plasma Mass Spectrometry (ICP- MS) X-Series 2 (Thermo Fisher Scientific, USA). The analytical part of our research was carried out on the basis of the laboratory of the Institute of Biosciences, Freiberg University of Technology and Mining Academy (Freiberg, Germany). At monitoring sites, significant differences were found in the content of macronutrients gross forms, and their variation relative to the control values as well. Potassium and sodium concentrations generally differed slightly or were close to control levels. The results of determining the content of calcium, magnesium and phosphorus indicate a significant deficiency or excess of these macronutrients in the soils of the devastated lands. An increased sulfur content was found in the soils of all monitoring sites, in some cases 4 times higher than the control level. The measured content of gross forms of iron, manganese, copper, cadmium and, partially, zinc in the soils of different monitoring sites exceeded the control values by 5.5 – 5.9 times. Thus, the analysis of the research results made it possible to establish that the soils of the devastated lands of the Petrovsky dump are characterized by unfavorable properties for the growth of most species of woody plants.