摘要
为了探究秦岭太白红杉(Larix chinensis)径向生长在不同时间尺度上的特征及其与立地环境因子的关系。利用树木年代学及样方调查法,在4个不同时间尺度(1、2、5、10年)4个样地内进行探究。结果表明:(1)随着时间尺度的增加,其径向增长量随树龄增加呈先增加后减小的趋势。(2)单因素方差分析表明,样地1和样地3径向生长差异不显著(P=0.810),样地2和样地4径向生长差异不显著(P=0.369),其他各样地间径向生长量差异极显著(P=0.000)。(3)逐步回归法分析表明:在1年的时间尺度上土壤厚度对太白红杉径向生长呈正相关;2年时间尺度上坡度和坡位对其径向生长呈负相关;5年和10年的时间尺度上岩石裸露度对太白红杉径向生长呈正相关,坡度对其径向生长呈负相关;海拔在4个时间尺度上对其径向生长无显著相关性。试验在研究时间尺度上太白红杉径向生长特征以及人工对其的栽培、抚育提供了一定的依据。
This paper aims to explore the characteristics of radial growth of Larix chinensis in different timescales and its relationship with environment factors in Qinling Mountains. The dendrochronology and thequadrat method were used with 4 different time scales（i.e. at intervals of 1, 2, 5 and 10 years, respectively） andin four sample plots with different environments. The results showed that：（1） with increasing time scale, theradial growth increased first and then decelerated with the increase of tree age;（2） the one- way ANOVAanalysis showed that the radial growth had no significant difference between Plot 1 and Plot 3（P =0.810）, so didthat between Plot 2 and Plot 4（P=0.369）; however, the difference between the other pairs of plots wasremarkably significant（P=0.000）;（3） stepwise regression analysis showed that the radial growth was positivelycorrelated to the soil thickness in 1 year time scale and negatively correlated to the slope and slope position in 2years time scale; however, in other time scale i.e. 5 years and 10 years, the radial growth was positively correlatedto bare rock degree, and negatively correlated to the slope; but the radial growth of the 4 time scales was notsignificantly correlated to the altitude. The experiment provided certain bases for exploring the characteristics ofradial growth of L. chinensis in different time scales and the artificial cultivation of L. chinensis.
出处
《中国农学通报》
2016年第28期1-6,共6页
Chinese Agricultural Science Bulletin
基金
陕西师范大学中央高校基本科研业务费(GK201503044)
关键词
太白红杉
径向生长
时间尺度
环境因子
Larix chinensis
radial growth
time scale
environmental factor
