气象要素对陇东塬区春玉米灌浆速度影响分析

为了研究气象要素对陇东塬区春玉米灌浆速度的影响,利用2018-2020年全国农业气象试验站西峰试验点玉米分期播种作物资料及气象资料,分析气象因素与玉米灌浆的关系.结果 表明:灌浆速度与灌浆天数变化呈二次曲线,开花始期后第24天开始到第46天是百粒重增长最快时间段,开花后第38天灌浆速度达到高峰;影响灌浆速度的主要气象因...

The Influence of Meteorological Factors on Grain Filling Speed of Spring Maize in the Plateau Area of Eastern Gansu

To study the influence of meteorological factors on spring maize grain filling speed in the plateau area of eastern Gansu Province, the authors used maize sowing data and meteorological data in Xifeng test site of the National Agrometeorological Experimental Station from 2018 to 2020, to analyze the relationship between meteorological factors and maize grain filling. The results showed that the variation of grain-filling speed and grain-filling days presented a quadratic curve. The 100-grain weight increased the fastest from the 24^th to 46^th day after flowering, and the grain filling speed reached the peak on the 38^th day after flowering. The main meteorological factors affecting the grain filling speed included the average temperature, the maximum temperature, the minimum temperature, daily range of temperature, sunshine hours, air humidity and precipitation. Temperature and sunshine had positive effects, while humidity and precipitation had negative effects. The suitable sowing time of maize should be determined according to the climate of the year, so that the rapid growth period of the 100-grain weight could coincide with the period of high temperature and little rain in Qingyang, avoiding the influence of the weather with more rain and less sunlight, thus achieving stable and high yield.