广西桂林不同植被覆盖下土壤含水量空间变异性研究

发布时间：2018-08-17 11:05

【摘要】：以桂林市农业科学院的大豆地、梨树地、甘蔗地为例,分析3个试验区土壤表层0~6cm土壤含水量变化规律以及空间分布特征。结果表明:降雨是影响土壤表层土壤含水量变化的关键因子,耕作方式也在一定程度上影响土壤含水量变化,梨树地土壤含水量是三者之中最高,甘蔗地土壤含水量次之,大豆地土壤含水量最小;3个试验区在3种不同土壤水分状态下的土壤含水量空间分布属于中等程度的空间相关性,受降雨因素和人为因素共同制约,在不同条件下他们各自占有的权重不同;尽管不同的植被覆盖条件以及人为因素干扰会影响土壤含水量空间分布,但是土壤含水量较高的区域相对稳定,表明土壤本身具有恢复其空间分布稳定性能力。
[Abstract]:Taking soybean field, pear field and sugarcane field of Guilin Academy of Agricultural Sciences as examples, the variation law and spatial distribution of soil water content in surface soil of 0~6cm in three experimental areas were analyzed. The results showed that rainfall was the key factor affecting the change of soil water content in surface soil, and tillage methods also affected the change of soil water content to a certain extent. The soil moisture content of pear field was the highest, and that of sugarcane field was the second. The spatial distribution of soil water content in the three experimental areas under three different soil moisture conditions was of moderate spatial correlation, which was restricted by both rainfall and human factors. Under different conditions, they have different weights; although different vegetation cover conditions and anthropogenic factors will affect the spatial distribution of soil water content, the regions with higher soil water content are relatively stable. It shows that the soil itself has the ability to restore the stability of its spatial distribution.
【作者单位】：桂林理工大学广西环境污染控制理论与技术重点实验室;桂林理工大学广西岩溶地区水污染控制与用水安全保障协同创新中心;土壤与农业可持续发展国家重点实验室/中国科学院南京土壤研究所;
【基金】：国家自然科学基金(41501230) 广西自然科学基金(2014GXNSFBA118098) 广西矿冶与环境科学实验中心和广西高等学校高水平创新团队及卓越学者计划项目(2014年)
【分类号】：S152.7

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