论文部分内容阅读
在自然条件最为严酷的黄土高原半干旱丘陵沟壑区,土壤水分是植物生长的主要限制因子,而环境因子对土壤水分的影响是一个综合作用的过程,不同的地理区域其相关的影响差异较大,但就其某一具体地区而言存在着重点尺度和主控因子。对黄土丘陵区纸坊沟流域乔、灌、草植被群落的土壤水分进行了分析研究,结果表明:坡位、坡向、海拔是影响该区域土壤水分含量的主控因子;而植被群落也会影响到土壤水分含量的变化,但不能确定其为主控因子,并且可以说明林龄不是影响该区水分含量的因素。
In the semi-arid hilly-gully area with the most severe natural conditions, soil moisture is the main limiting factor for plant growth. The influence of environmental factors on soil moisture is a comprehensive process. The influence of different geographical areas is quite different , But there are key dimensions and master factors in a particular area. The results showed that: slope position, aspect and elevation are the main controlling factors of soil moisture content in the area; and the vegetation community also Affected the change of soil moisture content, but it could not be determined as the main controlling factor, and it can be shown that the stand age is not the factor that affects the moisture content in this area.