| 肥密逆境对玉米果穗高维几何大小的影响及其与产量的关系 |
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| 引用本文： | 李娜娜,杨锦忠,郝建平.肥密逆境对玉米果穗高维几何大小的影响及其与产量的关系[J].核农学报,2011,25(3):563-569. |
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| 作者姓名： | 李娜娜 杨锦忠 郝建平 |
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| 作者单位： | 1. 山西农业大学,山西太谷,030801
2. 青岛农业大学,山东青岛,266109 |
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| 基金项目： | 山东省科技攻关计划项目,山东省农业重大应用技术创新项目,山西省资助归国留学人员项目 |
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| 摘 要： | 为认识玉米果穗体积等高维几何大小特征的动力学特性,明确肥密逆境对玉米果穗大小特征的影响及其与产量的关系,借助图像处理采集穗长(L)、穗粗(D)、穗正纵截面面积(简称穗面积,S)和穗体积(V),对2个玉米品种在无肥高密条件下以及除叶的效果进行典型变量分析、方差分析及曲线拟合.结果显示,吐丝时玉米果穗体积占其终值的7%、穗...
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| 关 键 词： | 玉米 果穗形态 生长胁迫 图像处理 穗体积 穗面积 |
| 收稿时间： | 2011-03-04 |
| 修稿时间： | 2011-03-15 |
INFLUENCE OF NUTRIENTS AND DENSITY STRESS ON EAR HIGH DIMENSIONAL SIZE OF GROWING EAR AND ITS RELATION TO KERNEL YIELD IN CORN |
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| LI Nana,YANG Jin-zhong,HAO Jian-ping.INFLUENCE OF NUTRIENTS AND DENSITY STRESS ON EAR HIGH DIMENSIONAL SIZE OF GROWING EAR AND ITS RELATION TO KERNEL YIELD IN CORN[J].Acta Agriculturae Nucleatae Sinica,2011,25(3):563-569. |
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| Authors: | LI Nana YANG Jin-zhong HAO Jian-ping |
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| Institution: | 1. Shanxi Agricultural University, Taigu, Shanxi 030801;
2. Qingdao Agricultural University, Qingdao, Shandong 266109 |
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| Abstract: | Characterizing dynamics of ear high dimensional size of corn (Zea mays L.), and understanding the effects of nutrients and density stress on ear size are important in corn crop science. By means of digital image analysis on whole ear RGB images, all 4 ear size traits of volume (V), longtudinal sectional area (S), diameter (D) and length (L) were extracted. The field experiment that was carried out on 2 cultivars under 2 fertilizer levels 2 planted density, defoliation treatment in a split plot design. All data were subjected to canonical variate analysis, variance analysis, and curve fitting. Volume was 7% of its final value at silking stage, area 20%,diameter 36%,and length 58%. There were huge changes in ear size within 2 weeks after silking, and after 21d, ear size came to a stable trend. Throughout the ear growth period, growth stress decreased by 24% volume ,18% area,8% diameter,and 11% length. Correlation coefficients between ear size traits and kernel yield were 0.96 for volume, area 0.95,diameter 0.78,and length 0.75 at mature stage. Quantitative formula relating area and volume to length and diameter followed as S= 0.778*L*D and V=0.515*L*D^2.Experimental and bio-physical evidences consistently showed that both of volume and area were more sensitive to nutrients and density stress, and had closer relation to kernel yield; volume approved a more potential trait in corn crop science domain. |
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| Keywords: | Zea mays L " target="_blank">)zz')" href="#"> corn (Zea mays L ) ear morphology growth stress image process ear volume ear area |
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