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首页> 外文期刊>Journal of Applied Life Sciences International >Maximizing Maize (Zea mays L.) Crop Yield via Matching the Appropriate Genotype with the Optimum Plant Density
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Maximizing Maize (Zea mays L.) Crop Yield via Matching the Appropriate Genotype with the Optimum Plant Density

机译：通过将适当的基因型与最佳植物密度匹配来最大化玉米（Zea mays L.）的作物产量

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Aim: The objective of this investigation was to match the functions of optimum plant density to produce the highest possible grain yield per unit area with the greatest maize genotype efficiency. Study Design: A split plot design in randomized complete block arrangement was used with three replications. The main plots were assigned to plant densities, and sub-plots to maize genotypes. Place and Duration of Study: This study was carried out at the Agricultural Experiment and Research Station of the Faculty of Agriculture, Cairo University, Giza, Egypt in 2012, 2013 and 2014 seasons. Methodology: Six maize inbred lines differing in tolerance to high density (D) [three tolerant (T); L-20, L-53, Sk-5, and three sensitive (S); L-18, L-28, Sd-7] were chosen for diallel crosses. Parents and hybrids were evaluated under three plant densities: low (47,600), medium (71,400), and high (95,200) plants ha-1. Results: The T×T hybrids were superior to the S×S and T×S hybrids under the high D in most studied traits across seasons. The relationships between the three densities and grain yield per hectare (GYPH) showed near-linear regression functions of increase for inbreds L-53, L-28, Sk-5 and Sd-7 and efficient non-responsive and inefficient responsive groups of hybrids with the optimum density of 95,200 plants ha-1, near-linear regression of increase for inbred L-18 with optimum density of 47,600 plants ha-1 and a curvilinear relationship for inbred L20 and the rest of the hybrids with the optimum density of 95,200 plants ha-1 for in-efficient non-responsive crosses and 88,000 plants ha-1 for inbred L20 and efficient responsive hybrids. Conclusion: Growing the tolerant hybrid L20×L53 under high-D gave the highest grain yield (17.05 t ha-1) in this study with a superiority to the best check (SC 2055) of 27.0%.
机译：目的：本研究的目的是使最佳植物密度的功能相匹配，从而以最大的玉米基因型效率使每单位面积的谷物产量最高。研究设计：随机完整块排列的分割图设计使用了三个重复。主要地块分配给植物密度，次地带分配给玉米基因型。研究的地点和持续时间：本研究于2012、2013和2014季节在埃及吉萨的开罗大学农业学院农业实验和研究站进行。方法：六个玉米自交系对高密度的耐受性不同（D）[三个耐受性（T）; L-20，L-53，Sk-5和三个敏感（S）;选择[L-18，L-28，Sd-7]作为二烯丙基杂交。在三种植物密度下对亲本和杂种进行了评估：低（47,600），中（71,400）和高（95,200）植物ha -1 。结果：在大多数研究的性状中，在整个季节中，在高D下，T×T杂种均优于S×S和T×S杂种。三种密度与每公顷籽粒产量（GYPH）之间的关系表明，自交系L-53，L-28，Sk-5和Sd-7以及杂种的高效无响应和低响应组的增加具有近线性回归函数最佳密度为95,200株植物ha -1 ，自交L-18的近线性回归增加，最佳密度为47,600株ha -1 和曲线相关自交L20和其他杂种，其低密度无效率杂交的最佳密度为95,200株ha -1 ，而自交L20和8的最佳密度为88,000株ha -1 。高效的响应式混合动力车。结论：在高D条件下种植耐性杂交L20×L53可获得最高产量（17.05 t ha -1 ），优于最佳对照（SC 2055）27.0％。

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