平原河网区水稻养分的利用效率研究

目的]研究潜江市平原河网区水稻的养分利用效率。方法]通过田间试验,研究了习惯施肥和配方施肥处理对水稻产量、肥料投入、养分表观协同利用率、肥料农学效率、水稻籽粒和茎叶养分含量的影响。结果]氮、磷、钾3者配施时肥料的表观利用率最高;与习惯施肥处理相比,配方施肥处理能提高肥料的农学效率、肥料养分利用率,并能促进氮的吸收,可增产3.45%,增收944.2元/hm~2。结论]该研究为优化施肥结构,提高肥料养分利用率提供理论基础。

Nutrient Use Efficiency of Rice in Plain River District

Objective] To research the nutrient use efficiency of rice in Plain River District.Method] By using field experiment, we researched the effects of conventional fertilization and formulated fertilization treatments on rice yield , fertilizer input, apparent efficiency of fertilizer, fertilizer agronomical efficiency, nutrient contents in rice seeds, stems and leaves. Result] The apparent efficiency of fertilizer was the best under combined application of nitrogen, phosphorus and potassium.Formulated fertilization treatment improved the fertilizer agronomical efficiency and fertilizer nutrient use efficiency, promoted the absorption of nitrogen, increased yield by 3.45％ and income by 944.2 yuan/hm2 compared with conventional fertilization.Conclusion] This research provides theoretical basis for the optimization of fertilization structure and the enhancement of fertilizer nutrient use efficiency.