施有机肥条件下的土壤溶液盐分变化动态

用定期取表层土样测定其电导率和在不同深度埋设盐分传感器探头的方法，在作物生长季节内，监测了施有机肥农田不同深度的土壤溶液含盐量变化。结果为：（1）田间施用有机肥可明显减少土壤表层盐分积累，并有利于灌水对土壤表层盐分的淋洗。（2）灌水使有机肥处理小区10cm深处土壤盐分含量迅速下降，并且灌水后10cm深土壤盐分的累积过程不明显。（3）施用有机肥可使30cm深土壤在灌水前的盐分累积过程变缓。灌水后盐分含量迅速下降，并不再回升。（4）有机肥处理小区的60cm深土壤溶液盐分大幅度降低出现在第二次灌水后，此后至作物收获，土壤溶液盐分含量保持在很低的水平并不再累积。

The Variation of Saltiness of Soil Solution in the Farmland Fertilized by Organic Manure

Cat No 5500 salinity sensor was used in a field plot experiment to monitor the variation of saltiness of soil solution in the plot fertilized by organic manure. The results were shown as follow: (1) Being organic manure was applied in farmland, not only the amount of salt accumulated in the surface of land would reduce, but also the amount of salt leached by irrigation water would increase when irrigating farmland. (2) Being organic manure was applied in farmland, the saltiness of soil solution underground 10cm declined quickly during the time of irrigation and increased slowly during the time of no irrigation. (3) Being organic manure was applied in farmland, the saltiness of soil solution underground 30cm declined quickly during the first time of irrigation and would not increase after that time.(4) Being organic manure was applied in farmland, the saltiness of soil solution underground 60cm declined greatly during the second time of irrigation and would not increase after that time.