低丘红壤深层水分的CASCADE模型应用与管理  

Application of CASCADE Model and Management of Deep Subsoil Water in Red Soil in Low Hilly Areas

作　　者：景元书[1] 张斌[1] 赵其国[1] Zepp H Thimm A 

机构地区：[1]中国科学院土壤研究所,江苏南京210008 [2]德国波鸿大学,德国44780

出　　处：《山地学报》2003年第4期461-465,共5页Mountain Research

基　　金：中德合作项目与国家自然科学基金项目资助(编号:40071044)。~~

摘　　要：低丘红壤深层水分对建立合理的耕作制度和旱季作物水分调控有重要意义。花生地定位试验实测数据表明:旱地土壤水分垂直梯度变化趋势基本表现为增长型,土壤含水量受降雨影响在40cm土层旱季明显大于雨季。采用CASCADE模型模拟了不同年型低丘红壤地区花生地土壤含水量的动态过程,各层次模拟值与实测值的平均绝对偏差<4 7%,模型可用于分析红壤水分的季节性变化规律和采取抗旱措施。还针对水分利用存在的问题,从工程措施、生物措施和生产措施三方面进行红壤旱地水分资源的有效管理,提高红壤地区降水资源与深层水分的利用率。Deep subsoil water in red soil is important to establishing reasonable tillage and managing crop in dry season in low hilly areas The data from fixed location showed that the soil moisture at upland fields rises with the depth increased in vertical direction, and was significantly affected by rainfall at 40 cm in dry season more than rainy season Based on the model CASCADE, the deep subsoil water in different levels was simulated in the peanut field in low hilly area The comparison of simulated and measured values showed that the absolute error is less than 47% on the average The model could be used to know the seasonal variation of soil moisture and could provide the prediction of seasonal droughts The paper suggested constructing the irrigation works, using biological methods and agriculture technical measures for promoting the rainfall and deep subsoil water use efficiency The other methods are also mentioned, such as the combination of ecological and watersaving irrigation technology, and the complex management of croppingforestryherbage

关 键 词：红壤 深层水分 模型 降雨年型 

分 类 号：S157.2[农业科学—土壤学] S273.29[农业科学—农业基础科学]