不同密度和施肥方式对玉米光合生理的影响  

Effects of Different Densities and Fertilization Methods on Photosynthetic Physiology of Maize

作　　者：高军 杨静静 侯金星 GAO Jun;YANG Jingjing;HOU Jinxing(Chiping District Agriculture and Rural Affairs Bureau in Liaocheng City,Chiping Shandong 252100)

机构地区：[1]聊城市茌平区农业农村局,山东茌平252100

出　　处：《现代农业科技》2023年第23期11-17,20,共8页Modern Agricultural Science and Technology

基　　金：国家玉米产业技术体系项目(nycytx-01)。

摘　　要：为进一步研究不同密度和施肥方式对玉米品种登海605光合生理的影响,挖掘其增产潜力,建立高产栽培模式,本试验设计5个密度处理(4万、5万、6万、7万、8万株/hm^(2))、3种施肥方式处理(施用缓释肥、分次施肥、一次性施肥),并对不同处理的光合参数、叶面积指数、光合有效辐射、透光率等指标进行测定。结果表明,不同施肥方式玉米植株上层、中层、下层光合参数变化规律表现一致,各层次表现为上层>中层>下层、分次施肥>施用缓释肥>一次性施肥,玉米植株上层各处理都能获得足够的光能和CO_(2),光合参数相差不大,适宜的密度和施肥方式能使玉米植株获得更多的光能、有效辐射,形成更多的干物质积累,从而提高产量。In order to further study the effects of different densities and fertilization methods on photosynthetic physiology of maize variety Denghai 605,tap its yield potential and establish a high-yield cultivation pattern,this experiment designed five density treatments(40000,50000,60000,70000 and 80000 plants per hectare),three fertilization treatments(applying slow-release fertilizer,fractional fertilization,single fertilization),and measured the indexes of photosynthetic parameters,leaf area index,photosynthetically active radiation and light transmittance in different treatments.The results showed that the changes of photosynthetic parameters in the upper,middle and lower layers were consistent in different fertilization methods,representing as upper layer>middle layer>lower layer,fractional fertilization>applying slow-release fertilizer>single fertilization.The upper layers of maize plant in each treatment can get enough light energy and CO_(2),the photosynthesis parameters were not much different.The appropriate density and fertilization method will help the maize plants get more light energy,effective radiation,more dry matter is accumulated and thus the yield will be increased.

关 键 词：玉米 密度 施肥方式 光合参数 光合有效辐射 叶面积指数 

分 类 号：S513[农业科学—作物学]