玉米生育期和籽粒淀粉含量的海拔效应研究

Influences of Elevation on Growth Period and Starch Content in Maize (Zea mays L.) Seeds

为使高海拔地区玉米生产布局和品种类型利用更加合理,采用作物生态学田间试验为主要研究方法,开展了玉米生育期和籽粒淀粉含量的海拔效应研究。用3个统一参试品种,于2006-2007年在甘肃省38°56′N,100°26′E范围内,布设了5个试点,分别是海拔1280.0、1506.5、1706.5、2000.0和2231.5m,进行了垂直生态试验。结果表明,在播期大体相同的条件下,玉米成熟期随海拔高度的升高而相应延迟。反映生育期长短的播种-成熟天数与海拔高度之间呈0.01水平的正相关。海拔高度每升降100m,参试玉米品种生育期延长、缩短4～5d。直链淀粉/粗淀粉与海拔之间呈负相关性。

In order to make corn produce distribution and corn varieties more reasonable at high altitude area, this paper studies corn growth period and quality characteristics based on field tests of corn ecological features. Three varieties are used in five test plots in 2006 and 2007 in Gansu province around 38°56′N, 100°26′E. The five plots are at elevation of 1 280.0 m, 1 506.5 m, 1 706.5 m, 2 000.0 m and 2 231.5 m, respectively. Vertical ecological tests are conducted. The results show that the corn maturing stages are delayed with the increase of altitude when the sow time keeps the same. The days of corn growth period from sow to mature are positively correlated at 0.01 with altitude. With an increase or decrease of altitude of 100m, corn growth period days would delay or advance d or 5 days. The amylose/grnff starch are negative correlated with ahitude.