作物生长条件下沙拉塔纳农田水盐耦合运移模型  

Water and Salt Transport Model in Shalatana under the Condition of Crop-growth

作　　者：虎胆.吐马尔白 王薇[1] 孟杰[1] 马英杰[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处：《新疆农业大学学报》2008年第1期93-96,共4页Journal of Xinjiang Agricultural University

基　　金：国家自然科学基金项目(50669007);新疆高校创新群体基金项目(XJEDU2005G02)

摘　　要：通过克州沙拉塔纳农田试验区实测资料的分析,建立了作物生长条件下土壤水分和盐分运移模型。在室内进行了土壤水分特征曲线,确定了扰动粘质粉壤土土壤水分特征曲线;再用HYDRUS模型反演计算了在室内外难以确定的土壤水分传导度,并用Van Genuchten方程拟合了参数。以这些参数为基础,模拟计算了气象条件类似土壤相同的格达良灌区土壤水盐运动规律,得出小麦作物从苗期至成熟期土壤含盐浓度随时间分布状况,为研究节水灌溉改良盐碱地课题提供科学数据。In this paper,the soil water retention curve from laboratory was calculated and the soil water hydraulic conductivity from inverse method of HYDRUS model was estimated under the condition of field data in Shalatana typical experimental area. The water and soil salt transport model were determined based on those soil physics parameters under the condition of data for laboratory and field data as well as meteor- ological data of this area. The salt distribution of soil profile was calculated by the model. The results showed that soil salinity was increased with increasing of crop evapotranspiration. The salt concentration in soil surface was decreased rapidly when irrigation leaching which plays a significant and instructive role in overall policy decision of water and salt movement and sustainable development of regional economy in arid region.

关 键 词：作物 农田 土壤水分运动参数 HYDRUS模型 水盐运移 

分 类 号：S152.72[农业科学—土壤学]