黄淮海夏玉米区南北部产量及相关性状差异分析

Analysis on Yield Difference Between South and Northof Huanghuaihai Summer Maize Region

为明确黄淮海南北部玉米产量差异及影响因素,本研究比较了玉米品种在黄淮海南北部的产量及相关性状之间的差异。结果表明,玉米产量、生育期、株高、穗位高、穗粒重、穗长、行粒数、百粒重等性状均表现为北部高于南部。降水量、气温等气象因素南部优于北部,日照时数北部优于南部。气候条件是限制黄淮海南部地区产量差异的外因,在同一区划内也应当根据不同亚区的生态条件,进行适宜熟期品种与栽培模式选择,才能保证玉米生产的高产、稳产。

In order to clarify the yield difference and influencing factors of maize in the north and south of Huanghuaihai,this study compared the yield and related traits of maize varieties in the north and south of Huanghuaihai.The results showed that the yield growth period,plant height,ear height,stable grain weight,ear length,number of grains per row,100 grain weight and other traits of maize were higher in the north than in the south.The precipitation,temperature and other meteorological factors in the south are better than those in the north,and the sunshine hours in the north are better than those in the south.Climatic conditions are the external factors that limit the yield difference in the southern part of the Huanghuaihai.In the same region,varieties and cultivation models suitable for maturity should be selected according to the ecological conditions of different subregions,so as to ensure the high and stable yield of maize.