期刊论文

Effects of Nitrogen Fertilizer Management Pattern and Planting Density on Yield and Diseases of Summer Corn in Southwest China

中文

华北农学报

1000-7091

2019

34

3

164-172

10.7668/hbnxb.201751125

2016YFD0300307-5:国家重点研发计划 2016HB0402:红河学院中青年学术带头人后备人才项目

本校为第一机构

为了研究不同的施氮模式和种植密度对西南夏玉米产量形成及茎腐病和穗粒腐病的影响。在大田试验条件下,设置2个施氮模式(CNP:传统施氮模式;RDNP:氮肥减量间隔穴深施模式)和3个密度(D1:习惯稀植5.25万株/hm~2;D2:密植6.75万株/hm~2;D3:密植8.25万株/hm~2),分析不同施氮模式和密度对玉米产量及构成、干物质积累、光合生理特性的影响,以及探明影响玉米机收质量的茎腐病和穗粒腐病发病规律。结果表明,施氮模式对玉米产量影响不显著,但是RDNP下的氮肥偏生产力比CNP提高了33.7%;RDNP通过缓解花后净光合速率(Pn)、叶片SPAD值及叶面积指数的衰减幅度,弥补花前形成穗粒数不足,从而使其干物质总量和产量稳...

The objective of the study was to investigate the effects of nitrogen fertilizer management pattern and planting density on the yield formation,stalk rot and ear and kernel rot of summer corn in field condition of Southwest China.Two levels of nitrogen fertilizer management pattern were arranged,i.e.conventional nitrogen fertilization(CNP) and nitrogen fertilizer reduction plus deep application in holes between plants and rows(RDNP).And three levels of planting density were designed:commonly used rare-planting(D1,52 500 plants/ha),densification...