双季稻田冬种对土壤肥力的影响及相关性分析

Effect of Winter Cropping System in Double-cropping Paddy Field on Soil Fertility and Correlation Analysis

通过大田试验,对比研究了"冬闲-双季稻"和不同的"冬种-双季稻"种植模式对土壤肥力的影响。结果表明:与冬闲-双季稻种植模式相比,冬种-双季稻种植模式的土壤容重均有一定程度的下降,其中冬种大麦模式的降低幅度最大;所有冬种-双季稻种植模式的土壤有机质、全氮、全磷、全钾及速效钾含量都有一定的增加,但冬种豌豆模式的土壤速效氮和有效磷含量降低了。综合全部指标来看,稻田冬季种植蚕豆模式增加土壤养分含量最明显。

In this paper, field experiments were conducted in Yujiang Institute of Agricultural Science to compare the soil fer- tility between winter fallow and winter cropping in double cropping paddy field. Results indicated that： in comparison with winter fallow - double cropping rice system, soil bulk density had decreased in all winter cropping systems, especially in winter barley - double cropping rice system. The soil organic matter, total nitrogen, total phosphorus, total potassium and available potassium con- tents were increased in all winter cropping Systems, but soil available nitrogen and effective phosphorus contents were decreased in winter pea - double cropping rice system. Considering all indexes, planting horsebean in double cropping paddy field in winter had the most obvious effect on the increase of soil nutrient content.