摘要
用1971-2004年甘肃黄土高原39个站的气温10℃初日和西峰农业气象试验站的冬小麦生育期资料,分析了对冬小麦生育期的影响.结果表明,甘肃黄土高原日平均气温稳定通过10℃的初日有3个偏早区,分别位于北道、兰州、泾川,有3个偏迟区,分别位于华家岭、东乡、岷县附近;最早的是北道为4月14日,最迟的是华家岭为6月5日;其空间分布特征是定西、临夏偏迟,天水、平凉、庆阳早,西北部的白银也较早;总的趋势是日平均气温稳定通过10℃的初日越来越早,特别是90年代以来的趋势更加明显;70年代大部分地方偏迟,80年代北部偏早,南部偏迟,90年代定西、临夏偏迟,其余偏早.西峰初日早的年份,积温高,日照充足,冬小麦各平均生育期普遍提前了3d以上,尤其是抽穗、开花期,提前了11～12d,全生育期提前了11d,最早的2004年比最迟的1993年的各生育期普遍提前了9d以上,特别是返青、起身期,提前了14～16d,全生育期提前了20d.
Based on the data of beginning date of 10℃ from 1971 to 2004 at 39 meteorological stations in the Loess Plateau of Gansu Province and data of the growing periods of winter wheat in Xifeng Agricultural Meteorological Station,The influence of beginning date of 10℃ on growing stages of winter wheat in Loess Plateau of Gansu Province was analyzed, The results showed that there were 3 regions in which the 10℃ beginning date was earlier located in Beidao,Lanzhou and Jingehuan,while there were 3 regions with later beginning date of 10℃ located in Huajialing,Dongxiang and Min County. The general trend showed that the beginning date of average daily temperature over 10℃became earlier,in particular in the 1990＇s. The average growing period of winter whole wheat was 3 days earlier growing period of winter generally,while the earing and flowering stage was 11 to 12 days earlier. The wheat was 11 days earlier.
出处
《中国农业气象》
CSCD
2006年第2期114-117,121,共5页
Chinese Journal of Agrometeorology
基金
国家自然科技基金(40205014)
甘肃省干旱气候变化与减灾重点实验室(Lab2002-2-05kys)
关键词
甘肃黄土高原
10℃气温初日
分布特征
冬小麦
生育期
Loess Plateau of Gansu Province
Beginning date of 10℃
Distribution character
Winter wheat
Growing period
