重庆山地血橙园不同模式土壤水分物理性状  

Research on Soil Moisture Properties under Different Types of Blood Orange Garden in Hilly Area of Chongqing

作　　者：李天阳[1] 何丙辉[1] 张怡[2] 闫建梅[1] 田家乐[1] 李振林[1] 

机构地区：[1]西南大学资源环境学院/三峡库区生态环境教育部重点实验室,重庆400715 [2]北京师范大学地理学与遥感科学学院,北京100875

出　　处：《水土保持研究》2014年第2期33-38,共6页Research of Soil and Water Conservation

基　　金：国家林业局公益性行业科研专项课题(201104043);重庆市重大科技专项(CSTC2009AB1115);西南大学生态学重点学科"211工程"三期建设项目

摘　　要：利用变异系数，结合相关分析及回归分析，研究了重庆山地血橙园地血橙-红薯、血橙花生、血橙玉米、血橙纯林、血橙-茄子5种模式下土壤水分物理性质的变异程度，建立了土壤入渗参数预报模型。结果表明：血橙园地各水分物理指标变异程度不同，土壤容重、毛管孔隙度、总孔隙度、持水量、土壤自然含水量、有机质、排水能力的变异系数〈15％，为弱变异；非毛管孔隙度、机械组成、土壤通气度的变异系数值处于15％～75％之间，为中等变异；土壤入渗特征的变异系数〉75％，为强变异。血橙-红薯，血橙-茄子模式的持水能力较强，砂粒含量较少，粉粒，黏粒含量相对较高，土壤初始含水率，通气度，排水能力，有机质等也较高，而血橙纯林的上述指标大小规律相反；土壤容重与稳定入渗率呈显著负相关，孔隙度、饱和持水量、毛管持水量、排水能力与稳定人渗率呈显著或极显著正相关。同时利用逐步回归法建立了影响土壤稳渗速率主要因子的线性回归方程。With coefficient of variation, correlation analysis and regression analysis, the variation degree of soil moisture and physi blood orange-peanut, b area of Chongqing, and the variation degrees of cal loo properties of the blood orange garden d the soil orange-maize, blood soil water infiltration orange-eggplant, prediction model moisture and physical properties were with growing blood orange-sweet potato, pure blood orange were studied in of hilly was established. The results indicated that different in blood garden. The coefficients of variation of soil bulk density, capillary porosity, total porosity, water-holding capacity, content, soil organic matter, drainage ability were less than 15 %, which were weak variatio of variation of non-capi 75%, which were me llary porosity, mechanical composition, soil venting quality were b um variation. The coefficients of variation of soil infiltration characte initial soil water no the coefficient etween 15% and ristics were greater than 75%, which were strong variation. The water-holding capacity, soil silt and clay content, initial soil water content, soil venting quality, drainage ability, soil organic matter of the patterns of blood orange-sweet potato and blood orange eggplant were higher and soil sand contents were lower. Moreover, the inde xes which were mentioned in the garden of pure blood orange had the inverse law. Soil bulk density had significant negative correlation with steady infiltration rate when porosity, maximum water-holding capacity, capillary water-holding capacity, drainage ability had significant or highly significant correlation with steady infiltration rate. With the stepwise regression method, the linear regression equation of the main factors which affected the soil steady infiltration rate was established.

关 键 词：水分物理性状 入渗预报模型 逐步回归 重庆山地 血橙园 

分 类 号：S152.7[农业科学—土壤学]