Journal articles: 'Pinus radiata Pruning'

1

Neilsen, W. A., and E. A. Pinkard. "Effects of green pruning on growth of Pinus radiata." Canadian Journal of Forest Research 33, no. 11 (November 1, 2003): 2067–73. http://dx.doi.org/10.1139/x03-131.

Full text

Abstract:

Pruning of plantation trees is completed to produce knot-free timber and veneer logs, thus increasing the value of the plantation. A long-term study (11 years) was established to investigate the effects of selective pruning on radiata pine (Pinus radiata D. Don) stem growth. The 175 stems selected for the experiment had been pruned to 2.4 m at 6 years of age. At ages 8 and 10, the trees were pruned to 45%, 60%, or 75% of tree height and growth was compared with a control (first lift pruned only). Pruning to 45% of tree height had no effect on growth to age 13 years. Responses to the other treatments were apparent soon after pruning and continued until measurements ceased at 17 years of age. Pruning to 60% or 75% of tree height at second lift reduced diameter increment, and increment decreased as pruning severity increased. There was a further separation of the growth curves following third-lift pruning to 60% or 75% of tree height. The results suggested that maintaining a live crown ratio of 55% would minimize effects of pruning on diameter growth. The effect of severe pruning on diameter increment was greater for subdominant trees than for dominant stems. Pruning had less effect on height than diameter increment, but all treatments involving pruning to 75% of height at third lift resulted in trees that were approximately 10% shorter than unpruned trees at 13 years of age. More severe second-lift pruning resulted in smaller diameter over stubs at the time of third-lift pruning. Second-lift pruning to 60% of total height produced acceptable diameter over stubs. Implications for management are discussed.

APA, Harvard, Vancouver, ISO, and other styles

2

Proe, M. F., D. J. Mead, and D. Byrne. "Effect of pruning on nitrogen dynamics within crowns of Pinus radiata." Tree Physiology 20, no. 10 (May 1, 2000): 653–61. http://dx.doi.org/10.1093/treephys/20.10.653.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hevia, Andrea, Juan Gabriel Álvarez-González, and Juan Majada. "Effects of pruning on knotty core taper and form of Pinus radiata and Pinus pinaster." European Journal of Wood and Wood Products 74, no. 5 (March 1, 2016): 741–50. http://dx.doi.org/10.1007/s00107-016-1019-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Chou, C. K. S., and M. MacKenzie. "Effect of pruning intensity and season on Diplodia pinea infection of Pinus radiata stem through pruning wounds." Forest Pathology 18, no. 7 (December 1988): 437–44. http://dx.doi.org/10.1111/j.1439-0329.1988.tb00233.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Fernández, MP, J. Basauri, C. Madariaga, M. Menéndez-Miguélez, R. Olea, and A. Zubizarreta-Gerendiain. "Effects of thinning and pruning on stem and crown characteristics of radiata pine (Pinus radiata D. Don)." iForest - Biogeosciences and Forestry 10, no. 2 (April 30, 2017): 383–90. http://dx.doi.org/10.3832/ifor2037-009.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Hevia, Andrea, Juan Gabriel Álvarez-González, and Juan Majada. "Erratum to: Effects of pruning on knotty core taper and form of Pinus radiata and Pinus pinaster." European Journal of Wood and Wood Products 74, no. 5 (April 7, 2016): 751–52. http://dx.doi.org/10.1007/s00107-016-1039-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Ramsfield, Tod D., Matthew WP Power, and Mark O. Kimberley. "The relationship between pruning and the incidence of Neonectria fuckeliana in Pinus radiata." New Zealand Journal of Forestry Science 43, no. 1 (2013): 13. http://dx.doi.org/10.1186/1179-5395-43-13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Dick, M. A., A. J. M. Hopkins, and M. W. P. Power. "Host variation in Pinus radiata in response to inoculation with Neonectria fuckeliana." New Zealand Plant Protection 61 (August 1, 2008): 390. http://dx.doi.org/10.30843/nzpp.2008.61.6864.

Full text

Abstract:

Neonectria fuckeliana causes a stem canker (Nectria flute canker) of plantationgrown Pinus radiata in southern regions of the South Island of New Zealand Initiation of disease is primarily associated with pruning operations and modification of pruning regimes has led to a reduction in disease incidence Factors that influence establishment of infection and symptom expression are being examined In one trial in which 50 trees were challenged with three different conidial concentrations individual trees varied markedly in their response to inoculation Twentytwo percent of controls (wounds inoculated with sterile water) developed depressions that resembled small cankers Six percent of the trees did not develop cankers at any concentration when inoculated with conidiospore solutions Fortyeight percent responded with increasing canker length with increasing dose and in 26 of trees severe cankering developed at all inoculum concentrations Perithecial formation on the cankers was correlated with canker severity Host genotype is being examined further with the goal of identifying families that contribute to susceptibility to canker formation

APA, Harvard, Vancouver, ISO, and other styles

9

Calva, Miguel Angel Guallpa, and Sonia Carmita Rosero Haro. "Evaluación Dasométrica De Una Plantación De Pinus Radiata D. Don En El Sector San Andrés, Guano, Ecuador." European Scientific Journal, ESJ 14, no. 15 (May 31, 2018): 78. http://dx.doi.org/10.19044/esj.2018.v14n15p78.

Full text

Abstract:

There are scarce information concerning the growth and productivity of the trees of the plantation of Pinus radiata D. Don. This is usually found in the forest estate of the Haro-Maderas factory in a condition of soil with sandy loam texture, deep and moderately fast drainage, pH 6.7, fertility between low and high with the specific application of a pruning activity at the age of 5 years, and gradual monitoring every year until 8 years of age. This is considered as part of its management which constitutes a benchmark in the Tahuala sector. For this reason, this study aims to evaluate its forest mass. Circular plots of 8.92m radius were installed at an intensity of 4.33% ha-1 . This, however, is done through a systematic aligned sampling for the collection of dasometric information. The application of statistical estimators showed an altitude of 3145 masl. It reached an average total height of 12.76 m, a DAP of 15.27 cm, the total average tree-1 estimated volume of 0.16 m3 , and its projected value of 303.56 m3 ha-1 . The relationship between the DAPage variables and the average-age total height was high and significant. It has a correlation coefficient equal to 0.99, whose estimation was better with the linear type equation. It was suggested that thinning should be carried out with an intensity of 28.77%. In regards to the remaining trees, it will be very necessary to apply the silvicultural treatment of pruning.

APA, Harvard, Vancouver, ISO, and other styles

10

Mason, Euan G. "Interactions between influences of genotype and grass competition on growth and wood stiffness of juvenile radiata pine in a summer-dry environment." Canadian Journal of Forest Research 36, no. 10 (October 1, 2006): 2454–63. http://dx.doi.org/10.1139/x06-098.

Full text

Abstract:

Clones of radiata pine (Pinus radiata D. Don) were established in two experiments on two contrasting pasture sites in Canterbury, New Zealand, with four levels of competition from grass as main plots within each experiment. Control was extended over the first 5 years at one site, whereas grass at the other site was controlled by a single herbicidal spray immediately after planting. At the latter site, 1 m diameter spots cleared with herbicide were compared with the same size spot created using a woven mat. Grass competition added up to 3 years to a rotation, and the gain from control was correlated with spot size. Competition control was most critical during the first year after planting. Trees grown within spots cleared by mats grew more slowly than those in weed-free spots cleared with herbicide. Green dynamic modulus of elasticity was related to genotype and increased with both slenderness and higher levels of pruning. Significant interactions between genotype and level of competition were observed for growth, indicating that choice of genotype can be a useful way of coping with pasture competition if managers wish to reduce the use of herbicides.

APA, Harvard, Vancouver, ISO, and other styles

11

Alonso-Rego, Cecilia, Paulo Fernandes, Juan Gabriel Álvarez-González, Stefano Arellano-Pérez, and Ana Daría Ruiz-González. "Individual-Tree and Stand-Level Models for Estimating Ladder Fuel Biomass Fractions in Unpruned Pinus radiata Plantations." Forests 13, no. 10 (October 15, 2022): 1697. http://dx.doi.org/10.3390/f13101697.

Full text

Abstract:

The mild climate and, in recent decades, the increased demand for timber have favoured the establishment of extensive plantations of fast-growing species such as Pinus radiata in Galicia (a fire-prone region in northwestern Spain). This species is characterised by very poor self-pruning; unmanaged pine stands have a worrying vertical continuity of fuels after crown closure because the dead lower branches accumulate large amounts of fine dead biomass including twigs and suspended needles. Despite the important contribution of these dead ladder fuels to the overall canopy biomass and to crown-fire hazards, equations for estimating these fuels have not yet been developed. In this study, two systems of equations for estimating dead ladder fuel according to size class and the vertical distribution in the first 6 m of the crown were fitted: a tree-level system based on individual tree and stand variables and a stand-level system based only on stand variables. The goodness-of-fit statistics for both model systems indicated that the estimates were robust and accurate. At the tree level, fuel biomass models explained between 35% and 59% of the observed variability, whereas cumulative fuel biomass models explained between 62% and 81% of the observed variability. On the other hand, at the stand level, fuel-load models explained between 88% and 98% of the observed variability, whereas cumulative fuel-load models explained more than 98% of the total observed variability. These systems will therefore allow managers to adequately quantify the dead ladder fuels in pure Pinus radiata stands and to identify the treatments required to reduce crown-fire hazard.

APA, Harvard, Vancouver, ISO, and other styles

12

Anderson, GW, and RW Moore. "Productivity in the first seven years of a Pinus radiata-annual pasture agroforest in Western Australia." Australian Journal of Experimental Agriculture 27, no. 2 (1987): 231. http://dx.doi.org/10.1071/ea9870231.

Full text

Abstract:

Pinus radiata seedlings were planted into an annual pasture at low, medium and high densities. The trees were pruned annually from year 4 and those with poor form were progressively culled until final stand densities of 75, 150 and 225 trees ha-1 were achieved 7 years after planting. The pastures were grazed by sheep from year 4. The sheep carrying capacities of the pastures declined as tree density increased because of competition between trees and pasture and also because of debris from thinning and pruning. In year 7, under the high density trees, the sheep carrying capacity of the pastures was 73% and light transmission was 69% of that of control pastures (no trees) and debris covered about 22% of the pasture. Diameter growth measurements from year 5 to 7 were 7.65, 7, 45 and 6.35 cm for low, medium and high density of trees respectively, which indicates that competition between trees had commenced at the high density (P<0.05). There was little conflict between the agricultural and forestry components at the low stand density with satisfactory production from both. This system has the potential to generate annual income to offset pine establishment and silvicultural costs while providing another source of income in the long term. It is being tried on farm scale by some landholders wishing to diversify from grazing-only enterprises.

APA, Harvard, Vancouver, ISO, and other styles

13

Wilcox, P. L., S. D. Carson, T. E. Richardson, R. D. Ball, G. P. Horgan, and P. Carter. "Benefitcost analysis of DNA marker-based selection in progenies of Pinus radiata seed orchard parents." Canadian Journal of Forest Research 31, no. 12 (December 1, 2001): 2213–24. http://dx.doi.org/10.1139/x01-144.

Full text

Abstract:

The financial viability of DNA marker-based within-family selection (MBS) compared with full-sib family forestry was evaluated for Pinus radiata Donn. ex D. Don. Two traits were investigated: wood density (WD) and diameter at breast height (DBH, 1.4 m). Assuming 20 biallelic loci of equal additive effect controlling trait variation in 15 unrelated top full-sib families of P. radiata, marginal costs of quantitative trait loci (QTL) detection and selection were estimated based on an average of slightly less than five loci per family. We assumed a program where 10 genotypes per family per year were deployed over a 5-year period, and each replicated 100 000 times via fascicle cuttings methods. Estimated marginal costs were NZ$32 and NZ$72 per 1000 plants for WD and DBH, respectively. Genotyping costs were the single largest component for both traits. Genetic gains were estimated by modifying predicted log volumes (DBH) or proportion of structural-grade timber (WD) with and without pruning. Estimated genetic gains ranged from 3.2 to 3.4%. Net present values (assuming a 9.5% discount rate) ranged from an average of NZ$51 to NZ$621/ha. Results showed that MBS for DBH was more profitable than for WD, despite markedly higher costs of QTL detection. All trait-silviculture combinations showed financial gains with internal rates of return of 9% or greater, even when estimated revenues were decreased 70% from forecast revenues. While this analysis is based on a large number of assumptions, it is robust and the results show that significant financial gains from MBS are possible even when selection is based upon DNA markers linked to a few loci each of relatively small effect.

APA, Harvard, Vancouver, ISO, and other styles

14

Kellas, JD, PR Bird, KN Cumming, GA Kearney, and AK Ashton. "Pasture production under a series of Pinus radiata-pasture agroforestry systems in South-West Victoria, Australia." Australian Journal of Agricultural Research 46, no. 6 (1995): 1285. http://dx.doi.org/10.1071/ar9951285.

Full text

Abstract:

Net pasture production has been monitored over time on an on-going Pinus radiata-pasture agroforestry experiment located at Carngham, Victoria. Established in 1983 by thinning a 2-year-old plantation, the study contains five treatments (systems): open pasture (no trees), 60 trees/ha, 200 trees/ha wide-spaced, 200 trees/ha 5-row belt and 1360 trees/ha. Net pasture production was only weakly affected by the proximity of trees in the 60 trees/ha and 200 trees/ha wide-spaced systems. However, in the 200 trees/ha 5-row belt system, pasture production was often significantly less within the tree zone and at 1.5 m from the tree edge compared with production at 10.5 m from the tree edge. While there was a trend for greater pasture production at 10.5 m and 18 m from the tree line than occurred in the open pasture system, the width of pasture adjacent to the 5-row belts was too narrow (36 m) to demonstrate any shelter benefit on pasture production. From 1990 to 1992, pasture production (kg ha-1) for each system was similar, although production tended to decrease with increasing tree stocking. Following the cessation of pruning (1992), pasture production was significantly reduced by increased tree stocking, such that pasture production in the 200 trees/ha wide-spaced and 200 trees/ha 5-row belt systems was 60% and 69% and 23% and 67% of open pasture in 1993 and 1994 respectively.

APA, Harvard, Vancouver, ISO, and other styles

15

Sudmeyer, R., and F. Flugge. "The economics of managing tree - crop competition in windbreak and alley systems." Australian Journal of Experimental Agriculture 45, no. 11 (2005): 1403. http://dx.doi.org/10.1071/ea04155.

Full text

Abstract:

Re-introducing trees and shrubs into agricultural landscapes as agroforestry systems establishes a tension between long-term objectives, such as increasing shelter, water use, nature conservation and harvesting tree products, and the short-term objective of maximising crop and pasture profitability. This paper describes the growth of crops, pastures and trees at the tree–crop interface in agroforestry systems and the economic returns from alley farming and windbreak systems using various tree–crop competition management strategies in the Esperance region of Western Australia. Severing lateral tree roots (root-pruning), harvesting mallees and allowing them to coppice, or thinning trees for sawlog regimes increased the yield of crops and pastures in the competition zone. In some instances, these increases were significant: root-pruning increased the annual return from crops grown in the competition zone of Pinus radiata by up to $548/km of the tree line at 1 site. Conversely, root-pruning reduced tree growth by 14–43% across all sites. Therefore, where trees provide benefits, such as shelter from damaging winds, the benefits of reduced tree–crop competition may not offset the consequent reduction in rate of tree growth. For mallee–crop alley systems on agriculturally productive soils, mallee growth rates must be high enough to compensate for crop losses in the competition zone. On less agriculturally productive soils, block-planting mallees may be more profitable than alley systems or crops without competition (sole-crops). This research has shown that competition management strategies can be used to manipulate the relative productivity of trees, crops and pasture at the tree–agriculture interface. The use of these strategies will depend on the relative economic value of tree and crop products and the value placed on other tree benefits, such as shelter and reduced groundwater recharge.

APA, Harvard, Vancouver, ISO, and other styles

16

Amezaga, I. "Forest characteristics affecting the rate of shoot pruning by the pine shoot beetle (Tomicus piniperda L.) in Pinus radiata D. Dopn and P. sylvestris L. plantations." Forestry 70, no. 2 (February 1, 1997): 129–37. http://dx.doi.org/10.1093/forestry/70.2.129.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Bandara, G. D., D. Whitehead, D. J. Mead, and D. J. Moot. "Effects of pruning and understorey vegetation on crown development, biomass increment and above-ground carbon partitioning in Pinus radiata D. Don trees growing at a dryland agroforestry site." Forest Ecology and Management 124, no. 2-3 (December 1999): 241–54. http://dx.doi.org/10.1016/s0378-1127(99)00074-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

M.P., Herve, Balocchi O.A., and Penaloza R. "Silvopastoral sheep and pine systems for small farmers in southern chile." Proceedings of the British Society of Animal Production (1972) 1990 (March 1990): 159. http://dx.doi.org/10.1017/s0308229600019395.

Full text

Abstract:

Chile's X region (40-43 degrees south), has around 1 million has. of marginal soils with forest-livestock potential use, red clay slopes being dominant, located in the coastal ranges. Subsistance agriculture with increasing erosion damage is carried out on small properties which also practice extensive livestock production with sheep and cattle.In order to study alternative land use which could benefit small peasant farmers agroforestry with sheep and pines was attempted.Two agroforestry systems using Pinus radiata D.Don and sheep were developed. System I started in 1977 planting 8 ha at 2,5 x 7m spacing. Romney ewes were introduced in 1979 initially at a stocking rate of 5/ha. Prunnings were carried out in 1980, 1984 and 1986; thinnings were done in 1982,1984 and 1986, to 7m and 200 st/ha respectively.System 2 used 20ha of conventional 2 x 2m forest planted in 1974. It was prunned and thinned in 1982,1984 and 1986 to Bm and 200 st /ha respectively and stocked initially with 4.7 Romney ewes/ha in 1983.

APA, Harvard, Vancouver, ISO, and other styles

19

Cabal, A., A. Kidelman, U. Ortega, M. Duñabeitia, and J. Majada. "Influence of chemical prunning on biomass and root system development in Pinus pinaster Ait. and Pinus radiata D. Don." Investigación Agraria: Sistemas y Recursos Forestales 14, no. 1 (April 1, 2005): 52. http://dx.doi.org/10.5424/srf/2005141-00873.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Moore, G. M., and P. G. McGarry. "Investigation of the Potential for Bark Patch Grafting to Facilitate Tree Wound Closure in Arboricultural Management Practice." Arboriculture & Urban Forestry 43, no. 5 (September 1, 2017). http://dx.doi.org/10.48044/jauf.2017.016.

Full text

Abstract:

Grafting and budding are common horticultural techniques, and similar techniques have been successfully used in the management of tree wounds by bridge and approach grafting. The success of bark grafts raises the possibility of using bark patch grafts to span trunk wounds and pruning cuts. Fifty seedling trees from each of six commonly planted Australian native and exotic species—Acacia dealbata, Banksia integrifolia, Eucalyptus viminalis, Platanus × acerifolia, Quercus robur, and Pinus radiata—had circular plugs of bark removed from their stem using a #3 cork borer (9 mm diameter). The plugs were lifted from the stem and then re-attached at one of four rotations (0, 90, 180, and 270 degrees) to the original cambial orientation in each of the four seasons. While there was no successful re-attachment for Pinus radiata, the data for the successful re-attachment of the other five species showed that the most successful orientation for re-attachment was in the original position (0 degrees); successful attachment did occur at other orientations. The best season for re-attachment was spring, but successful attachment did occur in other seasons; success was lowest when grafting was undertaken in winter. The use of bark patch grafts may provide arborists with an additional method for dealing with large wounds caused by vandalism and accidents, and would be particularly useful if a tree was of special, historic, or environmental significance to the landscape. Covering the wound with a bark patch graft may conceal the removal of a branch, hide obvious scarring, and at the same time reduce the risk of disease and stress to the tree by closing the wound more quickly than would normally occur due to natural callusing.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Pinus radiata Pruning'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles