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[目的]探索庐江地区主要高产水稻土壤上的早籼稻超高产栽培N、P、K肥料效应,解决早籼稻超高产栽培的精确定量施肥技术问题。[方法]在庐江地区主要高产水稻土壤上实施早籼稻超高产栽培的N、P、K肥料效应(3414)试验,拟合建立产量3元1次和1元2次肥料效应回归方程,单位产量养分吸收量和各养分肥料利用率的3元2次和1元2次肥料效应回归方程,各养分单位产量养分吸收量与产量水平间的1元2次回归方程等19套函数模型,并对3种常见施肥量推荐方法的估算结果进行比较。[结果]试验土壤的最佳产量为9279.6 kg/hm2,对应的N、P2O5、K2O施量分别为159.4、72.8、165.6 kg/hm2,当季养分利用率为49.3%、16.5%和30.3%。[结论]该研究为优化N、P、K肥施用量,建立该类土壤的测土配方施肥指标体系提供了依据。
[Objective] The study aimed to explore the effects of N, P and K fertilizer on the yield of early Indica rice on the main high yielding paddy soils in Lujiang area and solve the problem of precise and quantitative fertilization techniques for super high yielding cultivation of early indica rice. [Method] The experiment of N, P, K fertilizer effect (3414) on the super high yielding cultivation of early indica rice was carried out on the main high yielding paddy soils in Lujiang area. The regression equation of yield of 3 and 1 yuan and 2 times of fertilizer effect was established. The yield per unit yield Nutrient absorption and nutrient fertilizer utilization of 3 yuan 2 times and 1 yuan 2 times fertilizer effect regression equation, nutrient nutrient yield per unit of yield and yield of 1 yuan 2 times regression equation and other 19 sets of function model, and The results of three common methods for estimating the amount of fertilizer were compared. [Result] The optimum yield of the tested soil was 9279.6 kg / hm2, and the corresponding N, P2O5 and K2O dosages were 159.4, 72.8 and 165.6 kg / hm2, respectively. The nutrient utilization rate was 49.3%, 16.5% and 30.3% respectively. [Conclusion] The study provided the basis for optimizing the application rates of N, P and K fertilizers and establishing the index system of soil testing and formula fertilization for such soils.