| 黄斌,张洪芬.甘肃河西冬季平均冻土深度对春小麦生育期的影响[J].干旱地区农业研究,2009,27(1):254~257 |
| 甘肃河西冬季平均冻土深度对春小麦生育期的影响 |
| Influence of mean frozen soil depth in winter on spring wheat growth period in Hexi area of Gansu |
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| DOI：10.7606/j.issn.1000-7601.2009.01.48 |
| 中文关键词: 甘肃河西 冻土 春小麦 生育期 |
| 英文关键词:Hexi area of Gansu frozen soil depth growth period spring wheat |
| 基金项目:科技部科研院所社会公益研究专项(2005DIB3J100) |
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| 中文摘要: |
| 利用甘肃河西分布较为均匀的11个站点冬季平均冻土资料,分析冻土的年际变化特征,并分析了冻土深度对春小麦生育期的影响效应。结果表明:近45年来,甘肃河西冬季冻土深度的变化呈现出波动中逐年减小的趋势,其减小速率为5.5 cm/10a;甘肃河西西部、中部和东部的春小麦生育期均有提前趋势,中部提前趋势最为明显;冬季冻土深度与东部和西部春小麦生育期相关性显著,与中部的酒泉站春小麦生育期相关性较差,仅与出苗和三叶期相关性较好;春小麦生育期随冻土深度的增加而推迟,西部的敦煌推迟速率为1.82.4 d/10cm,中部的酒泉推迟速率为1.92.1 d/10cm,东部的武威推迟速率为1.33.0 d/10cm,变化范围较大。 |
| 英文摘要: |
| Using data of average frozen soil depth of winter from 11 stations with uniform distribution in Hexi area of Gansu,analysis is made of the inter annual variability characteristics of frozen soil depth and the effect of the frozen soil depth on the growth period of spring wheat.The results show that: the frozen soil depth of Hexi area of Gansu in winter shows a change fluctuation in the trend of decreasing year by year,and the rate of decrease is 5.5 cm/10a in nearly 45 years.Spring wheat growth periods are all ahead of trends in western,central and eastern part of Hexi area,and the most obvious trend of advance is in the central part.Frozen soil depth of winter is significantly associated with the growth period of spring wheat in the east and west,but not so obvious with that of the central station of Jiuquan,where it is only correlated with the emergence and three leaves stages.Spring wheat growth period postpones with the frozen soil depth increase,and the postponing rate is 1.8 to 2.4 d/10cm in Dunhuang,1.9～2.1 d/10cm in Jiuquan,and 1.3～3.0 d/10cm in Wuwei. |
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