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用张力计法测量了黄白土的持水特性及施用有机物料对其保水和供水性能的影响。结果表明 :(1 )在张力计测定范围内 ,黄白土土壤水吸力与含水量之间表现出显著的线性相关。(2 )施用有机物料 ,可以提高土壤的保水性能。其中施用牛粪的效果要优于麦秸。施用有机物料 ,还可以提高土壤速效水的上限 ,降低速效水的下限 ,提高速效水的含量 ,增强土壤水的有效性
The water-holding characteristics of yellow-white soil and the effects of organic materials on the water-holding and water-supplying properties were measured by tensiometer method. The results showed that: (1) Within the range of tension meter, there was a significant linear correlation between soil water suction and water content in yellow-white soil. (2) Application of organic materials, can improve soil water retention. Among them, cow dung is better than wheat straw. The use of organic materials can also increase the upper limit of soil available water, reduce the lower limit of available water, increase the content of quick-acting water, and enhance the effectiveness of soil water