反演分析土壤-秸秆水分运动参数  

Inverse Estimation for Soil and Straw Hydraulic Parameters from Lysimeters

作　　者：虎胆.吐马尔白 苏里坦[2] 

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 [2]中国科学院新疆生态地理研究所,乌鲁木齐830011

出　　处：《灌溉排水学报》2009年第1期68-70,共3页Journal of Irrigation and Drainage

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

摘　　要：通过潜水均衡试验站土壤测渗仪资料,以新疆具有一定代表性的轻粘土为例,利用无秸秆覆盖和地表以下35 cm秸秆覆盖的实测资料,研究作物生长条件下土壤水分和盐分运移模型参数,通过HYDRUS模型反演确定了土壤水分运动参数和秸秆水分参数。并与测筒实测数据进行了比较。通过计算,无论是模拟计算的土壤水分运动参数还是秸秆水分参数都与相应的测筒观测值具有良好的一致性,模拟值与实测值吻合较好,这表明了轻粘土土壤水分运动参数和秸秆水分运动参数的确定是合理的。这些参数的确定将为更好地模拟秸秆覆盖条件下土壤水盐运移规律,研究秸秆覆盖层阻止土壤潜水蒸发抵制土壤盐分向上运动提供科学数据。In this paper, we estimated the unsaturated soil water movement parameters and the straw water movement parameters from inverse method of HYDRUS model under the condition of data for no straw mulching and straw mulching at depth of 35 cm from surface. Compared the values with the observed values, and the simulated data are in accordance with measured data. The results show that determination of soil hydraulic parameters and straw water movement parameters is feasible in practice. Provided basic data for planning and application of controlling water and salt in this area. 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：秸秆覆盖 反演分析 HYDRUS模型 土壤水分运动参数 秸秆水分参数 

分 类 号：S152.7[农业科学—土壤学]