玉米缺粒与花粒期气象条件的关系分析

利用2015—2017年濉溪县气象局提供的气象资料和杨柳农业科学实验站品种试验数据,采用统计分析方法,分析玉米缺粒与花粒期气象条件的关系。3年86个玉米杂交种缺粒与产量和吐丝后气象条件逐步回归分析表明,缺粒率与行粒数、穗粒重呈负相关,与百粒重呈正相关;平均气温,尤其是平均最低气温较高,对玉米受精不利;平均最高气温较低、平均最低气温前高后低、降水量前少后多、日照充足对籽粒建成有利。

Analysis of the Relationship between the Corn Grain Shortage and Meteorological Conditions during the Flowering Period

Using the meteorological data provided by Suixi County Meteorological Bureau from 2015 to 2017 and the variety experimental data of Yangliu Agricultural Science Experimental Station,the statistical analysis method was used to analyze the relationship between maize grain deficiency and meteorological conditions at flowering stage.The stepwise regression analysis of corn grain shortage, yield and meteorological condition after silking in 86 corn hybrids in 3 years showed that grain shortage rate were negatively correlated with grain number per row and grain weight per ear,and positively correlated with hundred-grain weight.The average temperature,especially the average minimum tempera-ture,was not good for maize fertilization.The average maximum temperature was low,the average minimum temperature was high in the early period and low in the later period,precipitation was less in the early period and more in the later period,and sunshine was abundant,which was beneficial to grain formation.