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Добірка наукової літератури з теми "Pinus radiata Pruning"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "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.

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Анотація:
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.
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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.

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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.

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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.

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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.

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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.

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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.

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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.

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Анотація:
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
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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.

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Анотація:
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.
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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.

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Анотація:
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.
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