Effects of Combined Application of Water Retaining Agents and Organic Materials on Water Holding Characteristics of Yellow Brown Soils in Hilly Areas  

保水剂与有机物料联合施用对丘陵黄棕壤持水特性的影响（英文）

作　　者：唐玉邦[1] 虞利俊[1] 徐磊[1] 罗佳[2] 王东升 范如芹[2] 裴勤[1] 

机构地区：[1]江苏省农业科学院农业设施与准备研究所,江苏南京210014 [2]江苏省农业科学院资源与环境研究所,江苏南京210014 [3]南京市蔬菜研究所,江苏南京210042

出　　处：《Agricultural Science & Technology》2015年第9期1985-1988,共4页农业科学与技术（英文版）

基　　金：Supported by Fund for Independent Innovation of Agricultural Sciences in Jiangsu Province(CX(14)2099)~~

摘　　要：[Objective] The aim was to reduce fertilizer and water losses caused by surface runoffs in rainy season and provide scientific references for soil moisture in arid season. [Method] The application proportion of complex water-holding organic materials was determined by multi-factor mixture experiment and the curve changes of soil moisture characters were tested to analyze water-holding capacity and water availability of soils. [Result] The initial moisture content of soil with different mixture proportions improved in varying degrees. For example, when water-retention agents reached 0.4% and 0.6% of soil weight, soil moisture contents were 69.0% and70.5%, respectively, which showed significant differences with the control（S0.0）. Soil dehydration terms in different treatments all extended, prolonging in the range of4.6-14 d. [Conclusion] The applications of water-retention agent and organic material would improve water-holding capacity of hills and low mountains, and initial moisture content and dehydration cycle tend to be volatile upon mixture proportion. Therefore,it is necessary to adjust soil fertility, crop species, and irrigation to meet crop demands on fertilizer and water.[目的]减少丘陵坡地雨季地表径流造成的肥水损失,增加干旱季节土壤墒情提供科学数据。[方法]通过多因子复配试验明确复合保水型有机物料的施用比例,对土壤水分特征曲线变化进行测试,分析土壤持水特性及水分有效性。[结果]不同复配比例处理的土壤初始含水量均有所提高,当保水剂用量为土壤重量的0.4%和0.6%时土壤含水量分别达到69.0%和70.5%,与对照（S0.0）相比有显著性差异。各处理脱水期都有所延长,与对照组相比（张力值92.7 Kpa时）脱水天数延长了4.6~14d。[结论 ]保水剂和有机物料配合施用可改善丘陵荒坡地土壤的吸水持水性能,调整复配比例可获得不同初始水分含量和脱水周期,可根据当地的土壤肥力情况、作物种类、灌溉条件进行复配以满足作物生长对肥水的需求。

关 键 词：Water retaining agents Organic materials Soils of hilly areas Water characteristics 

分 类 号：S152.71[农业科学—土壤学]