黄土高原地区小老树成因及其改造途径的研究 Ⅰ小老树的分布及其生长特点  

Study on the forming of“small olded-tree”and the transforming way in the loess plateau Ⅰ.the distribution and growth nature of the small olded-tree

作　　者：侯庆春[1] 黄旭[1] 韩仕峰[1] 张孝中[1] 

机构地区：[1]中国科学院水利部西北水土保持研究所

出　　处：《水土保持学报》1991年第1期64-72,共9页Journal of Soil and Water Conservation

摘　　要：小老树的改造是林业生产中的重要内容。本文根据调查资料,提出了小老树集中分布区域和分布特点;分析了小老树单株树木生长过程和林分生长特点。为研究环境因子对小老树形成的影响提供依据。The status of soil moisture and nutrients in small-old-tree stan- ds and its impact on tree growh are analysed on the basis of field data. The result indicateed,the soil water deficits is an important factors for the small-old-tree,but low soil fertility and imbalance of nutrients are also significant factors.The inadequate soil nutrient not only impacted on tree growth,and on utilizing of soil moisture.

关 键 词：小老树 分布 生长特点 

分 类 号：S157.433[农业科学—土壤学]