The growth responses of Gaozhou masson pine pulpwood to 4 thinning intensities were studied by comparative analysis.The results indicated that,under the identical characteristics of soil profile and ground vegefation ...The growth responses of Gaozhou masson pine pulpwood to 4 thinning intensities were studied by comparative analysis.The results indicated that,under the identical characteristics of soil profile and ground vegefation in different thinning intensities,the variations of DBH and height under branch have significant differences with the maximum accretion of DBH and the lowest accretion of height under branch in 15*!m×20*!m stand,while the average increments of tree height and crown diameter were not obviously different.The aboveground biomass increments of 1.5*!m×1.5*!m and 1.5*!m×2.0*!m stands were higher than those of other stands by thinning within 3 years.Under the comprehensive survey of the growth responses of pulpwood to thinning intensity and the wood property for papermaking,the proper density of Gaozhou masson pine pulpwood should be 1.5*!m×2.0*!m with 15 years cutting period of return on hilly land of central Hubei Province.展开更多
研究甲维盐混配剂对马尾松的安全性、马尾松吸收药液情况、混配剂在马尾松树体内作用的持效期以及混配剂的剂量,结果表明:1)对胸径8 cm以上马尾松注干输药时,安全性高,达95%以上;2)对马尾松注干输药时,马尾松在各个时间均有良好的吸收率...研究甲维盐混配剂对马尾松的安全性、马尾松吸收药液情况、混配剂在马尾松树体内作用的持效期以及混配剂的剂量,结果表明:1)对胸径8 cm以上马尾松注干输药时,安全性高,达95%以上;2)对马尾松注干输药时,马尾松在各个时间均有良好的吸收率,达96%以上;3)甲维盐混配剂在马尾松树体内持效期长,可达5个月;4)使用5%甲维盐混配剂100 m L防治松褐天牛效果最佳,达到99.83%。展开更多
文摘The growth responses of Gaozhou masson pine pulpwood to 4 thinning intensities were studied by comparative analysis.The results indicated that,under the identical characteristics of soil profile and ground vegefation in different thinning intensities,the variations of DBH and height under branch have significant differences with the maximum accretion of DBH and the lowest accretion of height under branch in 15*!m×20*!m stand,while the average increments of tree height and crown diameter were not obviously different.The aboveground biomass increments of 1.5*!m×1.5*!m and 1.5*!m×2.0*!m stands were higher than those of other stands by thinning within 3 years.Under the comprehensive survey of the growth responses of pulpwood to thinning intensity and the wood property for papermaking,the proper density of Gaozhou masson pine pulpwood should be 1.5*!m×2.0*!m with 15 years cutting period of return on hilly land of central Hubei Province.
文摘研究甲维盐混配剂对马尾松的安全性、马尾松吸收药液情况、混配剂在马尾松树体内作用的持效期以及混配剂的剂量,结果表明:1)对胸径8 cm以上马尾松注干输药时,安全性高,达95%以上;2)对马尾松注干输药时,马尾松在各个时间均有良好的吸收率,达96%以上;3)甲维盐混配剂在马尾松树体内持效期长,可达5个月;4)使用5%甲维盐混配剂100 m L防治松褐天牛效果最佳,达到99.83%。
