论文部分内容阅读
通过施肥和不施肥处理,研究水稻收获后盐碱化稻田土壤养分状况,旨在明确盐碱化及养分投入对稻田土壤基础肥力的影响,为盐碱地水稻生产配方施肥提供理论依据。结果表明,不论施肥与否,土壤盐碱化均导致土壤全氮、速效氮、全磷、速效磷、速效钾含量下降;全钾含量变化略有不同,未施肥情况下,盐碱土壤全钾含量降低,施肥后,反而升高。化肥施入后,各处理全氮、全磷、速效磷含量相应增加,速效氮含量却相应下降,全钾、速效钾含量的变化受土壤类型和品种的影响较大。
Through fertilization and non-fertilization, the status of soil nutrients in paddy soils after salinization was studied. The purpose was to clarify the effects of salinization and nutrient input on soil fertility in paddy so as to provide a theoretical basis for formula fertilization in paddy soils. The results showed that the contents of soil total nitrogen, available nitrogen, total phosphorus, available phosphorus and available potassium decreased with soil salinization. The content of total potassium changed slightly. Under the condition of no fertilization, Content decreased, after fertilization, but increased. After the chemical fertilizers were applied, the contents of total nitrogen, total phosphorus and available phosphorus increased correspondingly while the contents of available nitrogen decreased correspondingly. The changes of total potassium and available potassium were greatly affected by soil types and varieties.