金称市镇烟稻轮作制中晚稻的施肥效应  

Fertilizing Efficiency of Middle-late Rice under Tobacco-rice Rotation System in Jinchenshi Town

作　　者：邹凯 盛浩[2] 张鹏博[2] 于庆涛 肖志祥 廖超林[2] 张杨珠[2] 

机构地区：[1]邵阳市烟草公司,湖南邵阳422112 [2]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《湖南农业科学》2013年第4期61-64,共4页Hunan Agricultural Sciences

基　　金：湖南省烟草公司邵阳市公司项目(12143)

摘　　要：2012年在湘中丘陵区的邵阳市金称市镇,选择烟稻轮作制下不同母质发育的稻田,采用"3414"试验方案开展晚稻的田间施肥试验,研究了不同施肥处理对烟稻轮作制下晚稻产量的影响。结果表明:不同试验点晚稻产量的地力贡献差异较大,介于38.5%~82.3%;施氮肥、磷肥具有明显增产效果,平均增产分别达53.5%和11.3%,单位养分增产分别为13.5 kg/kg和9.9 kg/kg,但施钾肥增产效果偏低,平均增产仅5.2%,单位养分增产2.4 kg/kg,部分小区甚至出现减产现象。随着氮磷钾施用量的增加,晚稻产量总体上呈现先增加后降低的趋势。基于一元二次方程模型,估算的最佳经济施肥量分别为N 160.7 kg/hm2,P2O537.1 kg/hm2,K2O40.3 kg/hm2。研究表明,该烟稻轮作制中,在晚稻科学合理施肥中应适当减少磷钾肥的施用。In order to study influences of different fertilizing treatments on yield of late rice under tobacco-rice rotation system,the fields developed from different mother materials under tobacco-rice rotation system in Shaoyang city were chosen to conduct field fertilizing experiments with "3414" method in 2012.The results showed that the fertility contribution for yield of late rice had relatively huge difference between different experiment sites,which was between 38.5% and 82.3%.Applying nitrogen fertilizer and phosphor fertilizer had obvious yield increasing effects that the yield increased by 53.5% and 11.3%,respectively;the unit nutrients increased by 13.5 kg/kg and 9.9 kg/kg,respectively;but applying kalium fertilizer had relatively worse yield increasing effects that the yield increased by only 5.2%;the unit yield increased by 2.4 kg/kg;and the partial plots appeared yield reduction.With increasing fertilizer rate of N,P and K,yield of late rice showed tendency of increasing first and then decreasing.Based on a single-variable quadratic equation model,the optimal estimated economic fertilizer rate of N,P2O5 and K2O was 160.7 kg/hm2,37.1 kg/hm2 and 40.3 kg/hm2,respectively.Therefore,the fields under tobacco-rice rotation system should reduce fertilizer rate of P and K.

关 键 词：岩溶区 烟稻轮作 晚稻 "3414"试验 施肥效应 

分 类 号：S[农业科学]