“3414”肥效试验对慈姑产量及经济效益的影响

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

[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,N_2P_2K_3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、P2O568.10 kg/hm^2、K2O534.90 kg/hm^2,慈姑最高产量为18 612.75 kg/hm^2。最佳经济产量的施肥量为:N 420.60 kg/hm^2、P2O570.50 kg/hm^2、K_2O_492.15 kg/hm^2,最佳产量为18 579.00 kg/hm^2。

[Objective]To screen the optimal fertilizer formula,and to lay foundation for the research on special fertilizer for Sagittaria sagittifolia production.[Method]＂3414＂Fertilization Effect Test was carried out.The yield of S.sagittifolia in each treatment was detected.The effects of N,P and K treatments on the yield and economic benefit of S.sagittifolia were researched.And the optimal fertilizer application ratio was obtained.[Result]N,P and K had relatively good effects on the yield of S.sagittifolia.Treatment N2P2K3 showed the optimal fertilizer application ratio,its yield was 18 397.80 kg/hm2,yield increasing rate was 104.77%,and net income increase was 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] The fertilizer application for highest yield of S.sagittifolia was N 446.70 kg/hm2,P2O568.10 kg/hm2,K2O 534.90 kg/hm2.Under this condition,the highest yield was 18 612.75 kg/hm2.Fertilizer application for the optimal economic benefit was N 420.60 kg/hm2,P2O5 70.50 kg/hm2,K2O 492.15 kg/hm2.Under this condition,the optimal yield was 18 579.00 kg/hm2.