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本文对我国西南地区不同纬度、不同海拔的8个中熟玉米品种主要生育阶段的时间变化与纬度和海拔高度的关系进行了分析,表明从出苗至抽雄、出苗至抽丝、抽丝至成熟、播种至成熟的时间随纬度和海拔升高明显延长。当海拔高度不变,纬度每升高1°,生育期分别平均延长 2.1±0.050、2.3±0.076、1.1±0.025、3.9±0.073天;纬度不变,海拔每升高lOOm,抽丝至成熟和播种至成熟分别平均延长1.4±0.110天和2.1±0.089天,但对延长出苗至抽雄和出苗至抽丝的时间的效应,年际间变化很大,变异系数分别为25.5％和
In this paper, the relationship between time variation and latitude and altitude in 8 maize varieties with different latitudes and altitudes at different latitudes in Southwest China was analyzed. The results showed that from the emergence to the tasseling, the sprouting to the drawing, the spinning to the maturity, Seeding to maturity time with the latitude and elevation increased significantly. When the altitude is the same, the latitude increases by 1 ° every time, the average growth period is 2.1 ± 0.050,2.3 ± 0.076,1.1 ± 0.025 and 3.9 ± 0.073 days respectively. When the latitude is constant, The average duration of sowing to maturity was 1.4 ± 0.110 days and 2.1 ± 0.089 days, respectively. However, the effects of prolonging emergence time to tasseling and sprouting to emergence were significant and the coefficients of variation were 25.5% and