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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。
Based on the soil infiltration test data from the submersible equilibrium station, taking the light clay in Xinjiang as an example, the model of soil moisture and salt transport under crop growth condition was studied using measured data without straw mulching and 35 cm straw cover below the surface. Parameters, the parameters of soil moisture movement and straw moisture were determined by HYDRUS model inversion. And with the measured data measured cylinder were compared. Through calculation, both the soil moisture movement parameters and the straw moisture parameters of simulation calculation have good consistency with the corresponding observation values of the measuring tube, and the simulation values are in good agreement with the measured values, which shows that the soil water movement parameters of the light clay and the straw Water movement parameters to determine is reasonable. The determination of these parameters will provide scientific data to better simulate the movement of soil water and salt under straw mulching conditions and to study the straw mulch to prevent the soil from evaporating to resist upward movement of soil salinity.