晋西黄土区果农间作界面土壤水分分布  

Soil Moisture Distribution at Fruit-Crop Intercropping Boundary in the Loess Region of Western Shanxi

作　　者：云雷[1] 毕华兴[1] 任怡[1] 马雯静[1] 田晓玲[1] 

机构地区：[1]水土保持与荒漠化防治教育部重点实验室(北京林业大学),北京100083

出　　处：《东北林业大学学报》2009年第9期70-73,78,共5页Journal of Northeast Forestry University

基　　金：国家"十一五"科技支撑项目(2006BAD03A0503)

摘　　要：对晋西黄土区3种典型果农间作界面上土壤水分含量的空间分布规律进行了研究。结果表明:在垂直方向上,土壤含水量的层次变化均非常显著,核桃×花生复合类型和其它两种复合类型(核桃×大豆、核桃×玉米)均有显著差异(P<0.01),但在整体上均为土壤水分随着土壤深度的增加而增加;在水平方向上,3种复合土壤水分含量同样存在差异(P<0.05),但总体趋势均为距果树带越近,土壤水分含量越低,土壤水分随着带距的增加,水分增加并趋于稳定,变化曲线呈抛物线状。对果农复合分别进行土壤水分与带距、土层深度关系的多元非线性回归分析,回归方程拟合较好。移动窗口法分析表明,3种复合类型的土壤水分影响域主要受植被根系的数量、分布和其它等因素的综合影响,且随着深度的不同而不同。An experiment was conducted to study the spatial distribution of soil moisture contents in different layers at three typical frnit-crop intereropping boundaries in the Loess Region of Western Shanxi. Results showed that, in vertical direction, soil moisture content varied significantly between different soil depths, and there were significant differences in soil water content between walnut-peanut intercropping and the other two types of fruit-crop intercropping （p 〈 0.01 ）. In general, soil moisture content increased with increasing soil depth in vertical direction. Differences （p 〈 0.05 ） in soil water content between the three types of fruit-crop intercropping in horizontal direction were also found, but the whole trend showed that soil moisture content decreased with the decrease of the distance from the tree row and increased with the increase of the distance, and then became stable, which could he well described by a parabola. Regression analysis between soil moisture content, distance from tree row and soil depth shows that the regression equation fits the data well. By using moving splitwindow techniques, it was obtained that the distance of edge influence for soil moisture content was mainly affected by root quantity and distribution as well as other factors, and varied with soil depth.

关 键 词：果农间作 土壤水分 空间分布 影响域 

分 类 号：S152.7[农业科学—土壤学]