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不同深度施用磷肥对小麦产量·磷肥利用率的影响
作者：肖习明， 伍德春 周建华 张顺陶 胡军
来源：《安徽农业科学》2014年第21期
摘要[目的] 研究不同深度施磷对小麦生长、经济性状、产量及磷肥利用率的影响关键词小麦； 深施；利用率； 效应
中图分类号S511文献标识码A 文章编号0517-6611（2014）21-07015-02
Effects of Phosphate Fertilizer Applied in Deep Place of Root Layer on Wheat Yield and Utilization Rate of Phosphate Fertilizer
XIAO Ximing et al （Soil Fertilizer Workstation of Jingmen， Jingmen， Hubei 448000） Abstract [Objective] The research aimed to study the effects of phosphate fertilizer applied in deep place of root layer on wheat growth， yield， economic characters， and the utilization rate of phosphate fertilizer. [Method] Phosphate fertilizer was applied on wheat root layer with different depth ， and the effects of fertilizer application were studied. [Result] 0-5 cm fertilizer treatment had better effect on increasing yield， and the yield was 4 500 kg/hm2 increased by 42.8% compared CK. The treatment could improve the utilization rate of fertilizer， increased by 2.9 percentage point compared with that of minimal phosphate fertilizer application in 15-20 cm.[Conclusion]The best effect of the phosphate application was 0-5 cm layer.
Key words Wheat； Deep application； Utilization rate； Effect
土壤缺磷是世界范围内普遍存在的问题[1]。长江中下游稻麦轮作区磷肥施用问题日益严重，造成磷肥利用率显著下降，对农业生态环境构成潜在危险。这不仅增加成本，降低效益，而且导致土壤环境的污染，直接影响粮食持续增产、农业增效、农民增收和农产品质量安全。磷肥移动性小，笔者通过小麦磷肥根层不同深度施用试验研究，为小麦合理施肥、预防过量施磷所造成的农田污染等提供理论依据。
1材料与方法
3结论与讨论
试验结果初步表明，与不施磷相比，各试验田块施磷增产效果显著[4]，但小麦施磷肥并不是越深效果越好，其中以0～5 cm施用效果最好。