钟祥市潴育型土壤水稻“3414”肥料效应完全试验分析

Complete experimental analysis of fertilizer effect of waterlogged paddy soil rice“3414”in Zhongxiang city

采用"3414"肥料效应试验设计方案进行田间试验,探讨钟祥市潴育型土壤水稻最佳的氮、磷、钾施肥用量及配比,研究当前推荐氮肥用量(N 180.0 kg/hm^2)、磷肥用量(P2O567.5 kg/hm^2)、钾肥用量(K2O90.0 kg/hm^2)对水稻的增产效果。结果表明,施肥增产效果明显,平均增产量为235.1~3 066.6 kg/hm^2,增幅为3.5%~45.3%;施肥增加毛收入587.8~7 666.5元/hm^2,增加投入886.5~2 361.1元/hm^2,产投比为0.7~3.9,纯收入为-298.5~5 697.0元/hm^2;氮肥的农学利用率为8.7~19.5 kg/kg,P2(P2O567.5 kg/hm^2)、P3(101.3 kg/hm^2)的农学利用率分别为13.5、4.8 kg/kg,K2(90.0 kg/hm^2)的农学利用率为6.5 kg/kg。

“3414”fertilizer effects test design scheme was adopted to carry out field experiments to explore the optimal amount and ra⁃tio of nitrogen,phosphorus and potassium fertilization in waterlogged paddy soil rice.The current recommended amount of nitrogen fer⁃tilizer(N 180.0 kg/hm^2),amount of phosphorus fertilizer(P2O567.5 kg/hm2)and amount of potassium fertilizer(K2O 90.0 kg/hm^2)on rice yield increase was studied.The results showed that fertilization increased the yield significantly,with an average yield increase of 235.1~3066.6 kg/hm^2,with growth of 3.5%~45.3%.Fertilization increased the gross income by 587.8~7666.5 yuan/hm^2,increased the investment by 886.5~2361.1 yuan/hm^2,the yield to investment ratio was 0.7~3.9,and the net income was-298.5~5697.0 yuan/hm^2.The agronomic utilization rate of nitrogen fertilizer was 8.7~19.5 kg/kg,13.5 kg/kg for P2(P2O567.5 kg/hm^2)and 4.8 kg for P3(101.3 kg/hm2),and 6.5 kg/kg for K2(90.0 kg/hm^2).