南方红豆杉当年造林效果探讨

本文通过对南方红豆杉一年生苗不同等级与处理的造林效果分析,认为当年造林的幼树株高与地径有两个生长峰期,株高生长量第一个峰期大于第二个峰期,地径生长量第二个峰期大于第一个峰期。一级苗造林成活率高于二级苗,施基肥造林成活率和生长量都高于不施基肥,且影响幼树的冠形,幼树生长适宜温度为23~30℃。利用方差分析,建立株高与地径、侧枝数生长方程,为生长管理提供理论依据。

Study on forest culture of 1-year plantation of Taxus chinensis var. mairei

The forest culture of 1-year plantation of Taxus chinensis var. mairei in different grades with different treatments was studied. The results showed that the tree height and diameter reached their growth peaks and the first height growing-peak was higher than the second while the first diameter growing-peak was lower than the second; classⅠseedlings had a better result than class Ⅱ; the survival rate and growth of seedlings treated with basal dressing were higher than those of seedlings without basal dressing; the optimum growth temperature of seedling was 23~30℃. Based on the analysis of variance, the regressive equations between the height and diameter, branch number were also built.