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以前,人们一致认为土壤有机质含量(OM)对土壤有效含水量(AWC)无影响或影响不大。本研究经过3种质地土壤OM对其AWC的影响效果进行试验和评价,证实上述观点是错误的。随着OM的增加,土壤田间含水量增加的速度大于永久凋萎点含水量增加的速度;OM与AWC之间存在着重要的正相关关系。
In the past, it was agreed that soil organic matter (OM) had little or no effect on soil available water content (AWC). This study tested and evaluated the effect of soil OM on AWC in three soil types, confirming the above point of view is wrong. With the increase of OM, the field moisture content in soil increased more rapidly than the moisture content at permanent wilting point. There was an important positive correlation between OM and AWC.