摘要
通过对楸树的生长情况进行调查分析表明：渭北旱原地区楸树的生长规律是，树高生长最快时期出现的较早，紧接着生长量急剧下降，胸径生长也以前期生长较快，会出现两个生长高峰，而对于其材积生长则为前期特别缓慢，以后随着年龄的增加，生长加快，大约30年以后，其增长逐渐稳定；不同立地条件生长以原面洼地材积生长最快，沟坡下部次之，原边、川道较差，山坡上部、山坡中部不太好，沟底生长最差；对于土壤，楸树的生长以黄绵土楸树最好，白善土次之，粗骨土最差。
Investigation on the growth of Catalpa bungei showed that height growth of Catalpa bungei appears earlier and slowed down rapidly; DBH growth have two peaks of growing while volume increases slowly in the early period and speeds up with the age and in about 30 years becomes steady.As for site conditions, Catalpa bungei has faster volume increase in depression, followed by the lower part of slope, marginal part of tableland, river bed and upper part of slope. The worst site condition is bottom of gully. As for soil requirements, Catalpa bungei favors loessal soil most and skeletal soil the least.
出处
《陕西林业科技》
2007年第3期59-62,共4页
Shaanxi Forest Science and Technology
关键词
渭北旱原
楸树
生长情况
立地条件
Weibei arid plateau
Catalpa bungei C. A. Mey
growth condition
site condition
