不同品种夏玉米主要性状与产量相关性分析  

Correlations Between the Main Characteristics and Yield of Different Summer Maize Hybrids

作　　者：张守林 张丞凤 

机构地区：[1]鹤壁市农业科学院,河南鹤壁458031 [2]鹤壁高中,河南鹤壁458030

出　　处：《中国农学通报》2014年第27期15-20,共6页Chinese Agricultural Science Bulletin

基　　金：现代农业产业技术体系建设专项资金(CARS-02-41);河南省重大科技专项"超高产玉米新品种选育"(0620010200)

摘　　要：为了探索不同品种夏玉米产量与主要性状关系,采用田间试验,研究了中国生产上利用的15个优良玉米杂交品种不同生育期的叶面积指数、叶面积指数增长率和光合势的变化及其与产量的关系。结果表明:15个玉米杂交种中‘登海602’产量最高,玉米叶面积指数较高,具有较高的光合势;各玉米品种间的叶面积指数随生育进程均呈单峰曲线变化,在吐丝期达到最高,各玉米品种间存在差异,玉米叶面积指数增长率亦具有相同趋势;各品种光合势在整个生育期呈单峰曲线变化,峰值出现在吐丝期至乳熟期;拔节—苗期叶面积指数增长率与产量的直接通径系数最大;蜡熟—完熟期的光合势对产量的直接效应最大。苗期—拔节期和蜡熟—完熟期是玉米高产形成的关键时期。In order to explore correlation of main traits and yield of different varieties of summer maize, field experiment was conducted to study the dynamic of the leaf area index, the growth rate of leaf area index, the photosynthetic potential, and their relationship with the yield. The results showed that, the yield, the leaf area index and the photosynthetic potential of ＇Denghai 602＇ were the highest of the 15 maize hybrids. The leaf area index of different maize hybrids presented a single peak curve change in the growth period, and it got the highest in the silking stage, there was a difference between different maize hybrids. The growth rate of leaf area index showed the same trend. The photosynthetic potential also presented a single peak curve change in the period, the peak was from the silking stage to milk ripe stage. The direct path coefficient between the growth rate of leaf area index and yield was the highest from the seedling stage to jointing stage. The direct effect on photosynthetic potential and yield was the highest from the ripening stage to maturing stage. Therefore, the seedling stage to jointing stage and the ripening stage to maturing stage were the important stage for maize to get high yield.

关 键 词：夏玉米 品种 产量 叶面积指数 光合势 相关性 

分 类 号：S-3[农业科学]