海拔高度对武陵山区玉米品种生育期和产量的影响

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。

Effect of Altitude Height on Growing Period and Yield of Maize in Wuling Mountain Area

This article analyzed that the corresponding relationships between the variation of growing period or grain yield and altitude height for 25 maize varieties,according to the information of corn region experiment at our country's Wuling Mountain Area in 2003 and 2004.The result showed that the relationships between the growing period of maize variety or its grain yield and altitude height could be described by liner regression equation y=a bx,the growing period was prolonged obviously and its grain yield was increased evidently with rising of altitude height.The growing period was lengthened 3.55 d and its grain yield was raised 314.85 kg/hm2 in 2003;the one was lengthened 2.95 d and ones grain yield was added 193.20 kg/hm2 in 2004 while the altitude height increased 100 m.