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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 6 0cm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。
Soil samples with different organic manure depths were monitored during the growing season by measuring the conductivity of the surface soil samples periodically and the salt sensor probe embedded at different depths. The results are as follows: (1) The application of organic manure in the field can obviously reduce the salt accumulation in the soil surface, and is conducive to irrigation on the soil surface salt leaching. (2) Irrigation caused the soil salinity content at the depth of 10 cm in the organic fertilizer treatment area to decline rapidly, and the accumulation of soil salinity in the depth of 10 cm after irrigation was not obvious. (3) Application of organic fertilizer can slow the accumulation of salt in 30 cm deep soil before irrigation. After the irrigation salt content decreased rapidly, and no longer picked up. (4) The salinity of 60 cm depth of soil solution in organic manure plot decreased significantly after the second irrigation, and then until the crop was harvested. The salt content of soil solution remained at a very low level and no longer accumulated.