石膏-微咸水复合灌溉量对土壤水盐分布特征的影响  

Effects of Saline Water Irrigation Capacity Under Gypsum Applied on Distribution Characteristics of Soil Water-salt

作　　者：赵秀芳[1,2] 杨劲松[1] 张清 王振宇 韩建均[1,3] 姚荣江[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]泰达园林建设有限公司,天津300475 [3]南京农业大学资源与环境学院,南京210095

出　　处：《土壤》2010年第6期978-982,共5页Soils

基　　金：国家"863"计划重点项目(2007AA091702);公益性行业(农业)科研专项经费项目(200903001);中国科学院知识创新工程重大项目(KSCX1-YW-09);国家自然科学基金项目(40771097)资助

摘　　要：通过田间试验,研究苏北滩涂区石膏-微咸水复合灌溉量对剖面土壤水盐分布特征的影响,结果表明:灌溉量是石膏-微咸水复合灌溉处理下制约土壤水盐分布特征的决定因素。灌溉量增加,湿润峰垂直运移距离加大,湿润峰内各土层的含水量逐渐增加。高于灌至0～90cm土层田间最大持水量的灌溉量能实现表土脱盐、脱钠,0～20cm土层效果最为显著,脱盐率、脱钠率高达29.0%、26.9%;低于灌至0～60cm土层田间最大持水量的灌溉量,会导致表土积盐、积钠,但随着灌溉量的增加,积累量有所减弱。Based on field experiment,the effects of saline water irrigation capacity under gypsum applied on the distribution characteristics of soil water-salt were studied in the coastal area of north Jiangsu Province.The results showed that irrigation capacity was the crucial factor constraining the distribution of soil water-salt under saline water irrigation with gypsum.With the increase of irrigation capacity,the vertical migration space of humid apex deepened and water contents in humid region increased gradually.The subduction of salt and Na＋ on the topsoil occurred at 0-90 cm depth under the irrigation capacity of above the maximal field water capacity,especially significant at 0-20 cm depth which of 29.0% salt and 26.9% sodium ion subduction ratios respectively;While the accumulation of salt and Na＋ ion in the topsoil occurred at 0-60cm depth under the irrigation capacity of below the maximal field water capacity,but which weakened with the increase of irrigation amount.

关 键 词：石膏 微咸水 灌溉量 含水量 含盐量 

分 类 号：S275[农业科学—农业水土工程]