祁连山区春季冻土深度特征及对春小麦发育期的影响  

The Spring Frozen Soil Depth Characteristic of Qilian Mountainous Area and Influence Relations to Spring Wheat Growth Period

作　　者：张洪芬[1,2] 王劲松[1] 刘治国[3] 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室中国气象局干旱气候变化与减灾重点开放实验室,兰州730020 [2]甘肃省庆阳市气象局,甘肃庆阳745000 [3]兰州中心气象台,兰州730020

出　　处：《中国农学通报》2009年第22期301-305,共5页Chinese Agricultural Science Bulletin

基　　金：科技部科研院所社会公益研究专项(2005DIB3J100)

摘　　要：为了分析祁连山冻土深度对春小麦发育期的影响,利用祁连山区11个站春季冻土深度及张掖和武威站春小麦发育期资料,采用回归分析、相关性检验、F检验等方法,分析了冻土深度的时空变化特征以及春季冻土深度对祁连山区春小麦发育期的东西部影响差异。结果表明:冻土深度最大出现在祁连站,以此为中心,向低海拔区域呈逐渐减小趋势;春季冻土深度随时间变化呈现明显的减小趋势,减小主要出现在1985年以后,1961—1984年变化幅度较小,这与春季明显的增温时段基本同步。春季冻土深度对祁连山东部代表站点武威春小麦的发育期影响效果显著,先后影响到了春小麦的播种、出苗、三叶、拔节、孕穗、抽穗以及成熟,冻土深度增加,则发育期延迟,延迟速率为0.5～2.4天/10cm;然而,春季冻土深度对西部代表站点张掖春小麦的影响并不显著,只对出苗和三叶产生一定的影响。In order to analyze the impact of the frozen soil depth on spring wheat growth period in Qilianshan area, used the 11 stations spring the frozen soil depth data of Qilian mountainous area and spring wheat growth period for Zhangye and Wuwei stations, and used the methods of regression analysis, correlation test, F test and so on, analyzed the frozen soil depth space and time change characteristic in Qilian mountainous area, and analyzed the spring frozen soil depth to the spring wheat growth period East-West section influence difference, The result indicated that, the deepest appears in Qilian, took this as the center, to the low-altitude regions assumes gradually reduced the tendency. Spring frozen soil depth presents along with the time variation obviously reduced the tendency, reduced mainly appeared after 1985, 1961-1984 annual variation scopes were small, this and spring obvious warming time interval basic synchronization. The frozen soil depth to spring wheat growth period influence effect was remarkable to the east of Qilian mountainous area, affected spring wheat＇s sowing seeds successively, emerged, three leaves, the jointing, the booting, the earring as well as mature, the frozen soil depth increased, then the growth period retarded, retarded the speed was 0.5-2.4 days/10cm. However, the frozen soil depth was not spring remarkable to the western spring wheat＇s influence, only to emerge had certain influence with three leaves.

关 键 词：祁连山区 冻土深度 时空变化 春小麦发育期 

分 类 号：S162.3[农业科学—农业气象学]