生态因素对不同类型玉米品种生长特性的影响

通过播期、覆膜调控，研究了不同生态条件下不同类型玉米品种的生长特性。试验表明，不同生态条件下玉米光合面积与根系数量存在较大差异；光合面积和开花期根系数量与产量都达极显著正相关；相同播期条件下，开花期掖单13光合面积和开花期根系数量大于登海1号。适宜生态条件下，穗粒性状变异系数小，果穗发育整齐一致。掖单13穗长较大，易于形成大果穗，高产潜力大，但高温弱光条件下，穗粒性状变异系数大，果穗发育不整齐。

Effects of Ecological Factors on Growth of Different Varieties Maize (Zea Mays L.)

By means of adjusting sowing dates and using plastic film,the growth performance of maize variety with different maturity was studied under different ecological conditions.The results indicated that maize LAI and root number were different under different ecological conditions,there were significant correlations between crop yield and LAI and root numbers at the flowering stage.At the same sowing date,the root number and LAI of Yedan 13 at anthesis stage were greater than Denghai No.1.The variance of maize ear and seeds were small and the ears were more uniform under suitable ecological conditions.The variety yedan13 had bigger ears and higher yield potential.Under high temperature and low light conditions.however,Yedan13 showed high variance in ear and seeds,and the development of the ears were not uniform.