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Spatial Differences of Populus Simonii Carr. Growthin Loess Gully and Hilly Region
Authors
从怀军
温仲明
焦峰
王飞
Publication date
1 January 2005
Publisher
Abstract
小叶杨是黄土高原地区栽植较为广泛的树种之一。通过对不同坡位小叶杨纯林和小叶杨+沙棘混交林中的小叶杨的生长状况的研究,结果表明:坡下位的小叶杨生长良好,郁闭度为30%,树高可达12.67m,而坡中位和坡上位的小叶杨树高仅为5.70m和5.21m,相差1倍以上。地径、胸径、枝下高和冠幅生长状况表现出同样的趋势;以沟谷地带的小叶杨的生长位为基点,则坡下部、中部和上部的小叶杨的树高和胸径相对生长潜力分别为沟谷小叶杨的77.53%,34.88%,31.88%和75.59%,39.51%,33.36%;但小叶杨与沙棘混交后,生长表现较为良好;混交林的覆盖度最高、并且具有较高的物种多样性指数,物种较多且分布均匀,具有良好的生态效益。研究表明,小叶杨作为该地区的一个隐域树种,除沟谷等一些水分条件较好的立地外,不宜进行大面积栽植
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018