玉米空秆气象成因分析

Effects of Meteorological Factors to Empty Corn

通过对中国不同地区的18个气象台站春玉米空秆率和气象因子的相关分析和回归分析,解释了气象因子对空秆率的影响程度以及因子间的相关关系,从而为控制或减轻玉米空秆的发生提供理论根据。结果表明,空秆率与苗期降水量大于25mm天数(Xa3)、穗期积温(Xc5)呈显著正相关,与穗期降水量大于25mm天数(Xc3)、乳熟期降水量大于0.1mm天数(Xd2)和日平均气温(Xd4)呈显著负相关。回归分析的通径系数结果表明Xa3、Xd4在模型中显著性最高,Xc3、Xc5、Xd2的显著性较低。回归方程量化了玉米空秆率和气象因子的关系,以及气象因子对空秆率的影响程度,对减轻空秆损失和指导玉米品种推广有一定的指导意义。

This article explainsed the influence of meteorological factors to the empty corn rate and the relationship between the factors through correlation analysis and regression analysis of 18 meteorological stations of spring maize empty corn rate and meteorological factors, so as to control or reduce the occurrence of empty corn and provide theoretical basis. Results showed that the empty corn rate was in a significant positive correlation with seedling precipitation 25 mm days （X a3）, spike period accumulated temperature （X c5）; the empty corn rate was in a significant negative correlation with panicle stage rainfall 25 mm days （X c3）, ratooning buds of rain 0.1 mm days （X d2） and the average daily temperature （X d4）. Regression analysis results showed that the size coefficientX a3,X d4 in the model in significant highest,X c3,X c5,X d2 significant was relatively low. Regression equation quantified empty corn rate and meteorological factors, and influence within meteorological factors, this conclusion could be used to alleviate empty corn loss and guiding corn variety extension.