不同时期追施缓混肥料对稻茬麦生长特征及产量的影响  

Effects of Topdressing Slow-mixing Fertilizer at Different Stages on Growth Characteristics and Yield of Wheat Following Rice

作　　者：杜同庆 徐鹏 李振宏 DU Tongqing;XU Peng;LI Zhenhong(Suining Agricultural Technology Extension Center,Suining Jiangsu 221200,China)

机构地区：[1]睢宁县农业技术推广中心,江苏睢宁221200

出　　处：《耕作与栽培》2023年第1期60-63,76,共5页Tillage and Cultivation

基　　金：江苏省现代农业(稻麦)产业技术体系项目(JATS[2022]079)。

摘　　要：本研究以返青期追施尿素为对照,设置了返青期、拔节期一次性施用缓混肥料两个处理,研究其对稻茬麦茎蘖动态、节间长度、叶面积指数、产量及效益的影响,以期为缓混肥料的施用提供理论依据。研究表明,返青期追施缓混肥料释放时间在小麦拔节期前后,基部第一、二节间长度变长。拔节期追施缓混肥料释放时间在小麦三、四节间伸长期,提高了开花期上二叶叶绿素的含量。拔节期施用缓混肥料处理提高了总小穗数,减少了退化小穗个数,穗实粒数显著性增加,提高了千粒重,实现产量的增加,效益较对照增幅4.08%。返青期追施缓混肥料处理产量与拔节期差异不显著,效益较对照增幅0.66%。In this study,the effects of onetime application of slow-mixed fertilizer on tiller dynamics,internode length,leaf area index,yield and benefit of wheat after rice were studied by setting up two treatments of onetime application of slow-mixed fertilizer at returning green stage and jointing stage,with topdressing urea at returning green stage as control,in order to provide theoretical basis for the application of slow-mixed fertilizer.Studies showed that the release time of topdressing slow-mixed fertilizer at the returning green stage was around the jointing stage of wheat,and the length of the first and second internodes at the base becomes longer.The release time of slow-mixed fertilizer at jointing stage was extended in the third and fourth internodes of wheat,which increased the chlorophyll content of the upper two leaves at flowering stage.The application of slow-mixed fertilizer at jointing stage increased the total number of spikelets,reduced the number of degraded spikelets,reached a significant increase in the number of grains per spike,increased the 1000-grain weight,and increased the yield.The benefit increased by 4.08%compared with the control.There was no significant difference in yield between topdressing slow-mixed fertilizer at regreening stage and jointing stage,and the benefit increased by 0.66%compared with the control.

关 键 词：稻茬麦 时期 缓混肥 生长特征 

分 类 号：S512.1[农业科学—作物学]