海拔对甘肃河西走廊玉米生育期的影响

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

为了研究海拔高度对玉米生育期的影响,1999年和2 0 0 4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15 0 6 5、170 6 5、2 0 0 0 0和2 2 31 5m。结果表明,6 0 8、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10 0m ,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。

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.