“3414”肥效试验对慈姑产量及经济效益的影响

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/hm2,增产率104.77％,净增收入80 317.35元/hm2.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/hm2、P2O5 68.10kg/hm2、K2O5 34.90 kg,/hm2,慈姑最高产量为18612.75 kg/hm2.最佳经济产量的施肥量为:N420.60 kg/hm2、P2O5 70.50 kg/hm2、K2O4 92.15kg/hm2,最佳产量为18 579.00 kg/hm2.

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

Objective] To screen the optimal fertilizer formula,and to lay foundation for the research on special fertilizer for Sagiffaria sagiffifolia 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 economic benefit of S.sagittifolia were investigated,obtaining the optimal fertilizer application ratio.Result] N,P and K had relatively good effects on the yield of S.sagittffolia.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 increase 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.sagiitifolia,the fertilizer application was as follows:N of 446.70 kg/hm2,P2O 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 Vield was 18 579.00 kg/hm2.