黑土坡耕地土壤湿度时空演变及其与大豆产量空间相关性分析  

Spatial-Temporal Variation of Soil Moisture and Its Spatial Correlations with Soybean Yield in Black Soil Sloping Farmland

作　　者：张兴义[1] 王其存[1] 隋跃宇[1] 于同艳[1] 

机构地区：[1]中国科学院东北地理与农业生态研究所,哈尔滨150040

出　　处：《土壤》2006年第4期410-416,共7页Soils

基　　金：黑龙江省科技攻关项目(GC03B301);自然科学基金项目(C2004-25)资助。

摘　　要：利用经典统计学和地统计学方法对典型黑土坡耕地土壤湿度时空演变特征以及大豆产量与海拔高度和不同时期土壤湿度的空间关系进行了分析。结果表明：黑土坡耕地土壤含水量具有较强的空间异质性，有效空间相关距离为159．3—506．6m，而且它们随着降雨和农田管理措施作用而改变。干旱加剧，土壤水分空间异质性加强，农田管理可降低土壤含水量的空间异质性。大豆产量同播种前后的土壤含水量存在显著的空间相关关系。Spatial-temporal variation of soil moisture and its spatial correlations with soybean yield were analyzed with the classical statistics and geostatistics in a black soil sloping farmland. Results showed soil moisture displayed a strong spatial heterogeneity in the sloping farmland, with an effective range varying from 159.3 m to 506.6 m and with rainfall and farming practices. Spatial heterogeneity of soil moisture was enhanced by drought, but could be reduced by farming practices. A significant relationship was found between soybean yield and soil moisture at the seeding stage.

关 键 词：黑土 坡耕地 土壤湿度 大豆产量 

分 类 号：S153.6[农业科学—土壤学]