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[目的]筛选最佳施肥配方,为慈姑生产专用肥的研究奠定基础。[方法]采用“3414”方案设计,测定每个施肥处理的慈姑产量;研究N、P、K不同施肥处理对慈姑产量和经济效益的影响;采用一元二次肥料效应模型得出慈姑最佳施肥量配比。[结果]N、P、K对慈姑产量有较大影响,N2P2K3处理的肥料配施比例最佳,产量为18 397.80 kg/hm~2,增产率104.77%,净增收入80 317.35元/hm~2。氮肥对慈姑产量的影响最大,钾肥其次,磷肥最小。[结论]慈姑最高产量的施肥量为:N 446.70 kg/hm~2、P2O568.10kg/hm~2、K2O534.90 kg/hm~2,慈姑最高产量为18612.75 kg/hm~2。最佳经济产量的施肥量为:N420.60 kg/hm~2、P2O570.50 kg/hm~2、K2O492.15kg/hm~2,最佳产量为18 579.00 kg/hm~2。
[Objective] The research aimed to screen the best fertilization formula and lay the foundation for the research of arrowhead special fertilizer. [Method] The design of “3414” was used to measure the yield of arrowhead for each fertilization treatment. The effects of different N, P and K fertilizer treatments on the yield and economic benefit of arrowhead were studied. The quadratic regression model Good fertilizer ratio. [Result] N, P and K had a significant impact on the yield of arrowhead. The proportion of N2P2K3 fertilizer was the best, yield was 18 397.80 kg / hm ~ 2, the yield was 104.77% and the net income was 80 317.35 yuan / hm ~ 2. Nitrogen fertilizer had the greatest impact on the yield of arrowhead, followed by potash fertilizer and the least phosphate fertilizer. [Conclusion] The highest yield of arrowhead fertilization was N 446.70 kg / hm ~ 2, P2O568.10kg / hm ~ 2, K2O534.90 kg / hm ~ 2, and the highest yield was 18612.75 kg / hm ~ 2. The optimum economic yield was N420.60 kg / hm ~ 2, P2O570.50 kg / hm ~ 2, K2O492.15 kg / hm ~ 2, and the best yield was 18 579.00 kg / hm ~ 2.