冬小麦群体不同分布方式对麦田土壤水分动态变化的影响

通过对冬小麦群体分布方式的调节,研究了冬小麦田土壤水分的动态变化。结果表明,不同深度的土壤水变化趋势随土壤层次增深而增加,A与B处理(行株距分别为7 cm×7 cm和14 cm×3.5 cm)在0~90 cm层次与其它处理的差异幅度较大,而100~120 cm土层差异幅度较小。从4种灌溉处理的土壤水分纵深分布比较来看,在不灌溉条件下,A与B处理能够充分利用冬小麦田深层土壤水分,在灌溉条件下,B处理的土壤水分含量高于其它处理,有利于提高浅层土壤的水分含量。

Study on Dynamic Changes of Field Soil Moisture under Different Distribution Patterns of Winter Wheat Population

The experiment was conducted to study the dynamic changes of soil moisture in wheat field through the regulation of winter wheat population patterns.The results showed that the soil moisture content increased with the soil layer deepening,treatments A and B were obviously distinct from the other treatments at the layer of 0~90 cm,while there were little differences at the 100~200 cm layer.When compared from vertical changes of soil water content,treatments A and B could utilize the soil moisture well in deep layer of wheat field under the condition of no irrigation.Under the irrigated condition,the soil moisture content of treatment B was higher than that of the other treatments,which was propitious to increase the moisture content of superficial soil.