集雨限量补灌条件下带田玉米土壤水分时空动态研究

Temporal and Spatial Dynamics of Soil Moisture in Intercropped Maize under Deficit Irrigation with Rainfall Harvesting

对旱地小麦/玉米带田集雨限量补灌条件下玉米带0～90cm土层土壤水分时空动态及其生长发育进行了分析,认为玉米全生育期不同土层土壤含水量变化较为一致,基本上呈以小喇叭口期为峰值的"单峰"曲线。并建立了0～30、30～60、60～90及0～90cm土层土壤含水量随时间变化的数学模型,以此来预测试验条件下套作玉米带土壤水分随时间变化的动态。

The temporal and spatial dynamics of soil moisture in intercropped maize in 90 cm depth of dryland under deficit irrigation through rainfall harvesting and the growth of crops were analyzed. The experimental results indicated that the soil water dynamics within different layers showed a consistency, that is, only one maximum values in their 'small horn' stages. In addition, mathematical models describing the changes of soil water contents with time within 30 cm, 60 cm, and 90 cm depth were also proposed, with which the temporal dynamics of soil water in the intercropped maize fields could be well predicted.