摘要
通过对三北地区河滩地喀左小钻杨树人工林的生长特性的研究 ,结果表明 :喀左小钻的轮伐期为 13～ 15a。经分析 ,喀左小钻生长过程分为 3个时期 :1～ 5a为幼林期 ,6～ 11a为速生期 ,12～ 15a为近、成熟期。根据其生长发育特性 ,在现有林分密度下 ,8年时应进行适当的抚育间伐 ,以提高林地生产力 ,培育高产、优质的大。
Result of the study showed that rotation of Populus simonii×P,negra var.italica is 13～15 years Growth of the poplar can be divided into 3 periods,young growth period,from 1st to 5th year,fast growing period,from 6th to 11th,and from 12th to 15th year is maturity period.The platation should be cutted selectively to increase productivity of the poplar stand in the eighth year.
出处
《防护林科技》
2002年第2期12-13,共2页
Protection Forest Science and Technology
关键词
三北地区
河滩地
杨树
人工林
生长特性
Populus simonii×P.nigra var.italica
growth characteristics
increment
