海拔对甘肃河西走廊玉米生育期的影响

为了研究海拔高度对玉米生育期的影响,1999年和2004年在甘肃省河西走廊的张掖市安排了4个试点的田间试验,海拔高度分别是1506.5、1706.5、2000.0和2231.5m.结果表明,608、酒单3号和中单2号3个不同熟期类型的玉米品种在同日播种条件下,随着海拔的升高成熟期延迟,海拔与品种的生育期之间呈极显著正相关,海拔每升高100m,生育期延长5～6d.海拔与播种至拔节天数之间也表现正相关,海拔与株高之间为负相关.

The Effect of Elevation on Growth Stage of Maize in the Western Yellow River Corridor of Gansu Province

Field experiments of four locations were conducted in 1999 and 2004 in Zhangye city of the Western Yellow River Corridor of Gansu province. Experimental maize varieties 608, Jiudan 3 and Zhongdan 2 belongs to different maturation groups. The elevations of four experimental locations is 1506.5,1706.5,2000.0 and 2231.5 m respectively. The results indicated that maturation was delayed gradually with the rise of elevation under same sowing condition. There was a significantly positive correlation between elevation and days of sowing to maturation for the maize varieties. Growth stage delayed 5 - 6 d with elevations raising per 100 m. The positive correlation had been shown between the elevation and days of sowing to elongation. There was a negative correlation between the elevation and plant height of maize varieties.