长期施用鸡粪稻田土壤肥力变化特征研究

通过采样调查,分析比较了海安县长期施用鸡粪和化肥的稻田土壤主要肥力指标的变化。结果表明:与长期施用化肥的稻田相比,长期施用鸡粪能明显改善土壤的物理性状,显著提高土壤的有机质、全氮、碱解氮、全磷、速效磷和速效钾的含量,其中对土壤速效磷含量的影响最大;长期大量施用鸡粪还造成氮、磷养分向土壤下层迁移累积,使耕层以下的土壤养分含量明显高于施用化肥的土壤。

Changes in Fertility of Paddy Soils under Long-term Chicken Manure Application

The changes in the main fertility indexes of paddy soils after long-time application of chicken manure and chemical fertilizer were comparatively analyzed through sampling investigation in Hai'an county,Jiangsu province.The results showed that: as compared with the long-term application of chemical fertilizer,the long-term application of chicken manure could obviously improve soil physical properties,significantly enhance the contents of organic matter,total nitrogen,available nitrogen,total phosphorus,available phosphorus and available potassium in the soil,and had the greatest influence on the soil available phosphorus content.The long-term application of chicken manure also caused the accumulation and transfer of N and P into the underlayer soil,and made the soil nutrient content below the cultivated layer markedly higher than that in the soil applied by chemical fertilizer.