摘要
为分析抚育间伐强度对惠水县杉木林生长指标及土壤肥力的影响,于惠水县国有祥摆林场某杉木林样地进行试验,根据不同间伐强度分为4个处理,CK(无间伐)、T1(间伐强度10%)、T2(间伐强度20%)、T3(间伐强度30%),T4(间伐强度40%),分析不同间伐强度下杉木林生长指标及土壤肥力。结果说明,T1、T2、T3、T4处理的平均胸径增长量、平均树高增长量、平均冠幅增长量较CK处理对比显著提升,T3处理平均胸径增长量、平均树高增长量、平均冠幅增长量较CK处理对比,分别增加32.14%、30%、31.19%。T1、T2、T3、T4处理的林地土壤速效氮含量、速效磷含量、速效钾含量、全氮含量、有机质含量显著高于CK处理(P<0.05),以T3处理土壤养分较为充足。由此可知,不同抚育间伐强度对惠水县杉木林生长指标及土壤肥力产生不同程度的影响,以间伐强度30%的杉木长势最佳,土壤肥力较为充足。
In order to analyze the effects of tending thinning intensity on the growth index and soil fertility of Chinese fir forest in Huishui County,a Chinese fir forest sample plot in State-owned Xiangbai Forest Farm of Huishui County was tested.According to different thinning intensity,it was divided into four treatments:CK(no thinning),T1(thinning intensity 10%),T2(thinning intensity 20%),T3(thinning intensity 30%).T4(thinning intensity 40%)was used to analyze the growth index and soil fertility of Chinese fir forest under different thinning intensity.The results showed that the average DBH growth,average tree height growth and average crown width growth of T1,T2,T3 and T4 treatment were significantly increased compared with CK treatment,and the average DBH growth,average tree height growth and average crown width growth of T3 treatment were increased by 32.14%,30%and 31.19%compared with CK treatment,respectively.The available nitrogen content,available phosphorus content,available potassium content,total nitrogen content and organic matter content of forest soil under T1,T2,T3 and T4 treatment were significantly higher than those under CK treatment(P<0.05),and the soil nutrients under T3 treatment were more adequate.It can be seen that different thinning intensity of tending had different effects on the growth index and soil fertility of Chinese fir forest in Huishui County,and the growth of Chinese fir forest under thinning intensity of 30%was the best,and the soil fertility was more adequate.
作者
罗毓彬
LUO Yubin(Huishui County State owned xiangpai forest farm,Qiannan 550600,Guizhou,China)
出处
《林业科技情报》
2025年第3期73-75,共3页
Forestry Science and Technology Information
关键词
抚育间伐强度
惠水县
杉木林
生长指标
土壤肥力
Tending thinning intensity
Huishui County
Chinese fir forest
growth index
soil fertility
