半干旱石质山区不同类型侧柏人工林生长模拟分析

Growth Simulation of Different Platycladus orientalis Plantations in Semi-arid Rocky Mountain Region

通过对南太行半干旱石质山区的2种类型侧柏人工林分别建立树高(Richards模型)和胸径(Gompertz模型)模型,对其生长过程进行分析研究。结果表明:混交林中侧柏树高和胸径的生长量均高于纯林;在预测期内,2种林分中侧柏的树高总生长量和混交林的胸径总生长量在持续增长;混交林的树高和胸径平均生长量分别在10年和15后出现高峰;侧柏纯林平均树高生长量在10年左右最大,平均胸径生长量在6年左右最大。

Tree height(Richards model)and DBH(Gompertz model)were established for two Platycladus orientalis plantations in the semi-arid rocky mountain region of South Taihang Mountains,and their growth processes were analyzed.Result shows that the growth of height and DBH for Platycladus orientalis in the mixed forest is higher than that of pure forest.During the forecast period,the total growth of height and the total DBH growth of the mixed forest of Platycladus orientalis with Amygdalus davidiana in the two forests will keep increasing.The average tree height and DBH of the forest peaked after 10 years and 15 years respectively;the average tree height growth of the pure forest is the largest at about 10 years,and the average DBH growth is the largest at about six years.