摘要
选取周口市10个气象站点1961—2015年的逐日气象资料和霜观测资料,应用气候线性倾向率法、相关分析法和MannKendall突变检验法,分析周口市冬小麦生育期内主要农业气候资源的时空变化趋势和特征。结果表明:研究区域近54年冬小麦生育期内≥0℃积温显著增加,20世纪90年代以来增加趋势更加显著,1993年为突变年;生育期内降水量年际和年代际波动明显,空间上从南至北递减;参考作物蒸散量有明显减少趋势,年际和年代际波动比较剧烈,空间上呈东西递减趋势;生育期内日照时数有明显减少趋势,21世纪初以来减少趋势更为显著,突变年为2005年,空间上东多西少;初霜冻日期呈推迟趋势,终霜冻日期呈提前趋势,导致霜期缩短,且三者的年际波动明显。
Based on the 1961-2015 daily meteorological data and frost observation data from 10 meteorological stations in Zhoukou City,the spatiotemporal trends and characteristics of the main agricultural climate resources in winter wheat season were analyzed by using linear trend estimate method, correlation analysis and Mann-Kendall test.The results indicated that the accumulated temperature higher than 0 ℃during the growing period of winter wheat increased significantly,and it had an abrupt change in the beginning of 1990s,with the 1993 discontinuity.The precipitation had little change,however,the inter-annual and decadal fluctuations were significant,with a decreasing trend from south to north in space. The reference crop evapotranspiration had a significant decrease, and the inter-annual and decadal fluctuations were significant,with a decreasing trend from east to west in space. The sunshine significantly decreased during the growing period of winter wheat, and it had an abrupt change in early twenty-first century, with the 2005 discontinuity and a decreasing trend from east to west in space. The first frost date was slightly delayed and the last frost date was ahead of time, which caused decrease of the frost days, and the inter-annual fluctuation was significant.
出处
《现代农业科技》
2017年第6期199-202,共4页
Modern Agricultural Science and Technology
基金
基金项目 基于FY3-MERSI数据与农田生态模型的土壤水分同化方法(AMF201404)
关键词
冬小麦
积温
参考作物蒸散量
霜期
时空分布
河南周口
winter wheat
accumulated temperature
reference crop evapotranspiration
frost season
spatiotemporal distribution
Zhoukou Henan
