格木山地造林幼林生长规律研究

对山地造林5年生(含苗期)格木的树高、地径和冠幅进行观测,研究其幼林生长规律。结果表明:格木树高和地径增长量均在第二年与第三年之间出现下降,第三年后呈上升趋势,且后期上升幅度更大,说明格木树高和地径在苗期生长较缓慢,从第三年开始出现快速生长,且增长幅度越来越大。连续4年格木冠幅增长量一直呈上升趋势,且上升幅度越来越大。由于试验研究时间较短,研究结果仅代表格木山地幼林在西双版纳初期的一些表现。

Growth Law of Young Erythrophleum fordii Plantation in Mountainous Area

The height,ground diameter and crown width of 5-year-old(including seedling)Erythrophleum fordii in mountain afforestation were observed to study the growth law of the young forest.The results showed that the growth of height and ground diameter decreased between the second year and the third year,and increased after the third year,and the increase was larger in the later period,which indicated that the growth of height and ground diameter was slower in the seedling stage,and began to grow rapidly from the third year,and the increase was larger and larger.The growth of crown width of Erythrophleum fordii had been on the rise for four consecutive years,and the increasing range was expanded.Due to the time limit of the experiment,the results only represented the early performance of the young Erythrophleum fordii forest in Xishuangbanna.