| 祁嘉郁,巴特尔·巴克.基于水分亏缺指数的北疆春小麦不同生育阶段干旱时空特征[J].干旱地区农业研究,2021,39(4):171~178 |
| 基于水分亏缺指数的北疆春小麦不同生育阶段干旱时空特征 |
| Temporal and spatial characteristics of drought in different growth stages of spring wheat in northern Xinjiang based on crop water deficit index |
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| DOI：10.7606/j.issn.1000-7601.2021.04.22 |
| 中文关键词: 水分亏缺指数 干旱时空特征；不同生育阶段；春小麦 |
| 英文关键词:crop water deficit index spatiotemporal features of drought different growth stage spring wheat |
| 基金项目:新疆维吾尔自治区自然科学基金(2021D01A84) |
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| 中文摘要: |
| 基于水分亏缺指数模型，结合新疆历史干旱资料记载，对比分析典型年份干旱指数，确定北疆春小麦干旱等级指标，利用ArcGIS探究1986—2016年北疆春小麦各生育阶段干旱强度、干旱站次比的年际变化规律以及干旱频率的时空分布特征。结果表明：除春小麦营养生长和生殖生长并进阶段干旱站次比呈微弱增大趋势（0.355%·10a-1），其余生长阶段干旱强度和干旱站次比均呈下降趋势；重旱和特旱在春小麦营养生长和生殖生长并进阶段发生频率最高（主要集中在50.00%~68.00%，0~3.87%），轻旱和中旱在春小麦生殖生长阶段发生频率最高（主要集中在12.00%~25.00%，12.91%~61.27%）；春小麦营养生长阶段，北疆北部地区重旱发生频率较其他地区高（主要集中在39.36%~54.19%），春小麦营养生长和生殖生长并进阶段，北疆东北部地区重旱和特旱发生频率更高（主要集中在67.72%~83.84%，7.74%~9.67%），春小麦生殖生长阶段，北疆西南部地区重旱发生频率较其他地区重旱频率更高（主要集中在46.44%~61.92%）；北疆地区在春小麦生长的3个生育阶段，生殖生长阶段中旱发生频率最高（主要集中在41.93%~51.6%），其余两个时期重旱发生频率均高于其他等级干旱发生频率（主要集中在39.36%~54.19%，51.61%~67.72%），而特旱发生频率均最低（主要集中在0~3%）。 |
| 英文摘要: |
| This paper is based on the crop water deficit index model and combines the historical drought in Xinjiang. According to data records, the drought index of typical years was compared and analyzed to determine the drought index of spring wheat in northern Xinjiang. ArcGIS was used to analyze the drought intensity, inter-annual variation of drought station ratios and the spatialtemporal distribution characteristics of drought frequency in northern Xinjiang from 1986 to 2016. The results showed that except for the spring wheat vegetative and reproductive growth together stage, the drought station ratio showed a slight increase(0.355%·10a-1), while the other growing stages showed a downward trend in drought intensity and drought station ratio. Severe and extra droughts have the highest frequency in the spring wheat vegetative and reproductive growth together stage(mainly concentrated in 50.00%~68.00%, 0~3.87%), while light and moderate droughts have the highest frequency in the spring wheat reproductive growth stage(mainly concentrated in 12.00%~25.00%, 12.91%~61.27%). Spring wheat vegetative growth stage, the frequency of severe drought in northern region of northern Xinjiang is higher than that in other regions(mainly concentrated in 39.36%~54.19%). In the vegetative and reproductive growth together stage of spring wheat, the frequency of severe and extra droughts in the northeast of north Xinjiang is higher(mainly concentrated in 67.72%~83.84%，7.74%~9.67%). At the spring wheat reproductive growth stage, the frequency of severe drought in the southwestern region of north Xinjiang is higher than that of other regions(mainly concentrated in 46.44%~61.92%). In the three growth stages of spring wheat growth in northern Xinjiang, the frequency of moderate drought was the highest in the reproductive growth stage(mainly concentrated in 41.93%~51.6%), the frequency of severe drought in the other two periods was higher than that of other grades(mainly concentrated in 39.36%~54.19%，51.61%~67.72%), and the frequency of extral drought was the lowest(mainly concentrated in 0~3%). |
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