山东省紧凑型玉米杂交种主要农艺性状对产量的影响及其演变规律的研究

通过对山东省1990～2000年紧凑型玉米杂交种主要农艺性状的分析,认为山东省紧凑型高产玉米杂交种产量的提高,主要是增加了穗粒数、穗行数、穗长、千粒重、生育期和抗病性.山东省1990～2000年紧凑型高产玉米杂交种主要农艺性状的演变规律是,公顷产量、株高和千粒重呈上升趋势,小斑病和大斑病基本呈平稳发展趋势,穗位高、穗长、穗行数、穗粒数和生育期的变化则无一定规律。

Studies on Effect of Major Agronomic Characters of Maize Hybrid on Maize Yield and Its Development Rule in Shandong Province

By analysing the major agronomic characters of maize hybrid in Shangdong province among 1990's-2000's,we found that the characters such as grain number per ear,ear length,1000 seeds weight and growth stage had some influence on the yield of compact maize hybrid,the characters such as grain number per ear,row number per ear,ear length and leaf spot had some influence on the yield of flat-unfolded maize hybrid.The development rule of the major agronomic characters of high-yield maize hybrid was that,firstky,the characters of the compact high-yield maize hybrid such as yield per ha,plant height,leaf spot and 1000 seeds weight tend to rise,there was no regularity in the leaf blight,height of ear length,row number per ear,grain number per ear and growth stage.Secondly,the characters of flat-unfolded high-yield maize hybrid such as yield per ha,height of ear and 1000 seeds weight tend to rise,and there was no regularity in the ear length,row number per ear,grain number per ear,leaf spot,leaf blight and growth stage.