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土壤水分状况是土壤肥力的重要组成因素之一,与农业生产的关系异常密切.它的性质及其动态状况,不仅影响土壤气、热和养分等肥力因素的协调变化,而且直接影响作物的生育.白浆土地区旱涝频繁,土壤水分变幅很大,常导致作物单产不高,总产不稳,严重阻碍农业生产的发展.我们从1979年以来在本所3号—2草甸白浆土上,研究土壤水分的物理性质.进行定点按旬观测层次土壤水分动态变化.设置田间试验地,结合生产调查,研究在不同措施条件下土壤水分的变化,探讨合理调节土壤水分的农业措施.现将几年来的结果报告如下.
Soil water status is one of the important components of soil fertility and its relationship with agricultural production is very close.The nature and dynamic status of soil moisture not only affects the coordinated changes of fertility factors such as soil gas, heat and nutrients, but also directly affects the fertility of crops The frequent occurrence of droughts and floods in the alluvial soil area and the large variation of soil moisture often result in low yield per unit area and unsteady total output, which seriously hinders the development of agricultural production. Since 1979, Soil properties, the physical properties of soil moisture were studied, and the dynamic changes of soil moisture at fixed observation intervals were set.Field experiments were set up to investigate the changes of soil moisture under different measures in combination with production surveys to explore agricultural measures that could reasonably regulate soil moisture Now the results of the past few years are reported below.