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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。
Through sampling survey, the change of main fertility index of paddy soils with long-term application of chicken manure and fertilizers in Haian County was analyzed and compared. The results showed that long-term application of chicken manure could significantly improve soil physical properties and significantly increase soil organic matter, total nitrogen, available nitrogen, total phosphorus, available phosphorus and available potassium compared with long-term application of fertilizers, The effect of soil available P was greatest. Long-term heavy application of chicken manure also caused nitrogen and phosphorus nutrients to migrate and accumulate to the lower soil layer, so that the soil nutrient contents below the tillage layer were significantly higher than those of fertilizers.