不同密度下玉米叶绿素荧光参数分析和产量差异比较  

Chlorophyll fluorescence parameters and yield analysis of maize at different planting intensity levels

作　　者：魏湜[1] 孟繁美[1] 李晶[1] 赵东旭[1] 顾万荣[1] 孙继[1] 

机构地区：[1]东北农业大学农学院,哈尔滨150030

出　　处：《东北农业大学学报》2013年第10期1-5,共5页Journal of Northeast Agricultural University

基　　金：国家"十二五"科技支撑计划项目(2011BAD16B11-02)

摘　　要：为明确黑龙江省主栽玉米品种的密度增产潜力和增密条件下叶绿素荧光参数变化规律,试验以平展型玉米品种丰禾1号、紧凑型郑单958为试验材料,各设置5种密度处理,对叶绿素荧光参数和产量进行比较分析。结果表明,紧凑型玉米的初始荧光(Fo)值、光系统II反应中心(PSII)最大光化学量子产量(Fv/Fm)及PSⅡ潜在活性(Fv/Fo)的下降幅度均小于平展型玉米,说明平展型玉米对密度反应敏感,当密度增加到一定值时,PSII内部光能转换效率降低,潜在活性下降明显,而紧凑型玉米下降较小。产量构成因素表现为穗粒数下降,百粒重降低。丰禾1号在播种密度为5万株·hm-2时获得最高产量9 829 kg·hm-2,而郑单958在播种密度为6万株·hm-2获得11 272 kg·hm-2的最高产量。适度增密,紧凑型玉米具有更好的光合优势和增产效果。The paper was to test the yield increase potential of different maize hybrids in Heilongjiang Province, The experiment takes the spreading-leaf Fenghel and upright-leaf Zhengdan958 as materials. Five different intensity levels were set up to analyze chlorophyll fluorescence parameters and yield. The results showed that the Fo, Fv/Fm and Fv/Fo of upright-leaf maize＇s decreased ranges are lower than those of spreading-leaf maize, which means spreading-leaf maize is sensitive to increasing planting intensity. With the intensity increases to a certain level, PSII reaction center internal light energy conversion efficiency decreased consequently. And also, PSII potential activity decreased conspicuously. Yield component factors showed that with the 100-seed weight decreasing, the decline of grain number per spike was appearing. 50 000 plants, hm-2 of Fenghel reaches 9 829 kg- hm2,which reaching highest output. And Zhengdan 958 reached 11 272 kgo hm-2 under 60 000 plants, hm2.

关 键 词：玉米 密度 株型 叶绿素荧光参数 产量 

分 类 号：S482.3[农业科学—农药学]