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根据国家武陵山区2003、2004年玉米区域试验资料,分析了25个玉米品种(组合)的生育期和产量表现与海拔高度的对应变化关系。结果表明,生育期和产量与海拔高度的关系可用线性回归方程y=a+bx来描述,随着海拔升高,生育期明显延长,产量明显增加。海拔每升高100m,2003年生育期延长3.55d,产量增加314.85kg/hm2;2004年生育期延长2.95d,产量增加193.20kg/hm2。
According to the regional test data of maize in Wuling mountainous area in 2003 and 2004, the relationship between the growth and yield of 25 maize varieties (combinations) and the corresponding change of altitude was analyzed. The results showed that the relationship between growth and yield and altitude could be described by the linear regression equation y = a + bx. With the elevation increasing, the growth period was significantly prolonged and the yield was obviously increased. For each 100 m elevation, the growth period in 2003 was 3.55 days and the output increased by 314.85 kg / hm2. The growth period in 2004 was 2.95 days and the output increased by 193.20 kg / hm2.