水稻秸秆还田对稻田土壤肥力的影响

Impacts of rice straw returning to the field on the soil fertility

通过一年两点田间小区试验,研究水稻秸秆还田对稻田土壤肥力的影响.结果表明:在常规施肥水平下,随水稻秸秆还田量增加,土壤容重变小,阳离子交换量增加;土壤有机质和土壤速效钾质量比有增加的趋势.秸秆还田对土壤理化性状具有一定的改善效果.

Through a year of two field plot experiment, we studied the effect of the rice straw returning on the soil fertility of paddy. The results showed that： under the conventional fertilization level, with the increasing of amount of rice straw returned, The soil bulk density became decrease, but the cation exchange capacity became increase; Meanwhile, soil organic matter and soil available potassium content had present a tendency to increase. So, rice straw returned to paddy can certainly improve physical and chemical characteristics.