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林场培育速生树种的主要目的是通过采取必要的农业措施,增加单位面积的木材产量。美国、加拿大、意大利、瑞典、芬兰等国家都在研究短期内生产纤维造纸及板材工业所需木材原料的可能性。它主要建立在加速培育密植的轮伐期为1—5年的造林树种的基础上。如杨树便是其中之一。西德在研究Aigeiros(黑杨)和Tacamahaca(青杨)杂交组合的17个无性系人工林在三年培育期内获得木材原料。栽植方式为0.3×1.5米,土壤气候条件为:海拔115
The main objective of planting fast-growing tree species in forest farms is to increase timber production per unit area by taking the necessary agricultural measures. The United States, Canada, Italy, Sweden, Finland and other countries are studying the possibility of producing wood raw materials for the fiber paper and board industry in the short term. It is mainly based on accelerating the cultivation of dense planting rotation tree species 1-5 years. Such as poplar is one of them. West Germany obtained wood raw material for three years of cultivation in 17 clonal plantations that studied the hybrids of Aigeiros and Tacamahaca. Planting way is 0.3 × 1.5 meters, soil climate conditions: elevation 115