旱地玉米种植密度与产量及农艺性状的相关和灰色关联度分析

Correlation Analysis and Grey Correlated Degree Between Yield and Agronomic Characters with Planting Density of Maize in Dry Land

利用相关性分析方法和灰色关联度分析方法,研究旱地玉米种植密度与产量和农艺性状的关系。结果表明,种植密度与产量及主要农艺性状的关联度从大到小的顺序为穗位高>秃尖长>产量>穗粗>株高>穗长>千粒重>茎粗,表明受密度影响较大的性状因子主要是穗位高和秃尖长,与种植密度与穗位高、秃尖长分别呈极显著和显著正相关的结果一致。密度与产量尽管相关性不显著,但关联度较大,说明合理密植对提高产量具有重要作用。

The correlation analysis and grey correlation degree analysis were employed to investigate the correla- tion between planting density and agronomic characters, yield of maize in dry land. The results showed that the signif- icant positive correlation existed between planting density and the ear height, barren tip length and yield respectively. The correlation coefficient between planting density and yield, agronomic characters in turn was ear height, barren tip length, yield, ear diameter, plant height, ear length, 1 000-grain weight and stem diameter. The ear height, barren tip length and yield were affected more by planting density. Although the correlation degree was not high, positive corre- lation existed between planting density and yield, it showed that it is important for yield improvement with reasonable plantin~ density.