Effects of “3414” Fertilization Effect Test on the Yield and Economic Benefit of Sagittaria sagittifolia

“3414”肥效试验对慈姑产量及经济效益的影响（英文）

[Objective] To screen the optimal fertilizer formula, and to lay foundation for the research on special fertilizer for Sagittaria sagittifolia production. [Method] Based on the ＂3414＂ fertilization design, the yield of S. sagittifolia in each treatment was determined, and the effects of N, P and K treatments on the yield and eco- nomic benefit of S. sagittifolia were investigated, obtaining the optimal fertilizer appli- cation ratio. [Result] N, P and K had relatively good effects on the yield of S. sagittifolia. Treatment of N2P2K3 showed the optimal fertilizer application ratio, with the yield of 18 397.80 kg/hm2, yield increasing rate of 104.77%, and net income in- crease of 80 317.35 Yuan/hm2. N fertilizer had the greatest impacts on the yield of S. sagittifolia, followed with K fertilizer; while P fertilizer showed the poorest impacts. [Conclusion] To achieve the highest yield of S. sagittifolia, the fertilizer application was as follows： N of 446.70 kg/hm2, P20 of 568.10 kg/hm2, K2O of 534.90 kg/hm2, when the highest yield was 18 612.75 kg/hm2. Fertilizer application for the optimal economic benefit was N of 420.60 kg/hm2, P2O5 of 70.50 kg/hm2, K2O of 492.15 kg/hm2, when the optimal yield was 18 579.00 kg/hm2.

[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。