玉米产量与播种密度的回归模型及相关分析

The Regression Model and Correlation Analysis Between Maize Yield and Planting Density

为了探索玉米种植密度与产量间的关系,以及不同种植密度间实际产量与标准产量的相互关系,以玉米品种‘并单16’为研究对象,设计6个不同种植密度,分别为52500、56250、60000、63750、67500、71250株/hm^(2),运用SPSS对标准产量与主要农艺性状中的穗长、穗粗、秃尖长、穗行数、行粒数、百粒重、出籽率、种植密度、实际产量进行线性回归分析,构建回归分析模型。以实际产量、种植密度与标准产量构建的回归模型为y=403.997-0.15×种植密度+0.558×实际产量;标准产量与各性状间的回归模型为y=-123.292-0.037×密度-34.237×穗粗-55.099×穗长+31.950×穗行数+23.801×行粒数+7.023×秃尖长+10.649×籽粒含水量-3.006×百粒重+9.193×出籽率-0.204×实际产量;其中以实际产量、种植密度与标准产量构建的回归模型显著性较好。

To explore the relationship between maize planting density and yield,and the relationship between actual yield and standard yield among different planting densities,‘Bingdan 16’was used as the material,six planting densities were set,which were 52500、56250、60000、63750、67500、71250 plant/hm^(2),and the SPSS was applied to analyze the linear regression of the standard yield and main agronomic traits like spike length,spike diameter,bald tip length,rows per spike,grains per row,100-grain weight,seed rate,planting density and actual yield,and then the regression analysis model was constructed.The regression model of actual yield,planting density and standard yield was y=403.997-0.15×planting density+0.558×actual yield.The regression model between standard yield and traits was y=-123.292-0.037×density-34.237×ear diameter-55.099×ear length+31.950 row number+23.801 row number+7.023×bald tip length+10.649×grain water content-3.006×100 grain weight+9.193 seed yield-0.204×actual yield;the regression model constructed by actual yield,planting density and standard yield was more significant.