盐碱化及养分投入对稻田土壤基础肥力的影响

Effect of Soil Salinization and Nutrient Inputs on Soil Fertility of Paddy Field

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。

By comparing of soil nutrient condition with fertilization and no fertilization treatments, the effect of soil salinization and nutrient inputs on soil fertility of paddy field was clarified, which provides theoretical basis for formula fertilization in soda alkali-saline area. The results showed that the contents of total N, available N, total P, available P and available K in alkali-saline soil decreased with fertilization and no fertilization treatments. But change of total K content was different. It decreased in no fertilization treatments.In fertilization treatment, the content of total K increased. After chemical fertilizer was applied, the contents of total N, total P and available P were increased, respectively. However, available N decreased correspondingly.The contents of total K and available K were influenced by soil types and plant variety.