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基于水分亏缺指数的贵州省水稻干旱特征分析 被引量:5

Analysis of Characteristics of Rice Drought in Guizhou Province Based on Water Deficit Index
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摘要 为探究贵州省水稻生长期的干旱特征,以作物水分亏缺指数作为干旱研究指标,结合协同克里金插值法及趋势分析等方法,利用贵州省31个气象站点逐日气象数据,分析贵州省水稻种植区水稻各生育时期的降水-需水变化特征及不同等级干旱的频率分布特征。研究表明:水稻生长期的降水量呈"东增西减"特征分布,各生长期累积降水量为移栽-分蘖期>抽穗-成熟期>播种-秧苗期>拔节-孕穗期,播种-秧苗期降水呈减少趋势,可能会加剧干旱灾害的发生;各生长期累积需水量为抽穗-成熟期>移栽-分蘖期>拔节-孕穗期>播种-秧苗期,播种-秧苗期水稻需水量小于同时期降水量,在播种-秧苗期各等级干旱发生的频率较低,铜仁地区及黔东南地区的东部在拔节-孕穗期和抽穗-成熟期是重旱及特旱的高频发生区。 To explore the drought characteristics of rice growth periods in Guizhou province, this study analyzed various characteristics of the precipitation and water demand for different growth stages of rice in the rice planting regions of Guizhou province and the frequency distribution characteristics for the different drought levels, which is based on daily meteorological data of 31 weather stations by the Crop Water Deficit Index and combined with the collaborative kriging interpolation and trend analysis methods. The results showed that the precipitation in the rice growing periods increased in the east and decreased in the west with the cumulative precipitation values of transplanting-tillering stage>heading-ripening stage>sowing-seedling stage>jointing-booting stage, and the decreasing trend of precipitation in the sowing-seedling stages could cause the occurrence of drought. The cumulative water demand in different growth periods was the heading-ripening stage>transplanting-tillering stage>jointing-booting stage>sowing-seedling stage. The water requirement of rice in sowing-seedling periods was less than the precipitation in the same period, and the drought frequencies in the different levels were lower. The high frequency regions were observed in the Tongren area and the eastern parts of southeast Guizhou in the jointing-booting and heading-ripening stages.
作者 邢愿 贺中华 Xing Yuan;He Zhonghua(School of Geographic and Environ mental Science(School of Karst Scien ce),Guizhou Normal Un iversity,Guiya ng 550001,Guizhou,Chin a;State Engin eeri ng Tech no logy In stitute for Karst Desertificati on Control,Guizhou Normal University,Guiyang 550001,Guizhou,China)
出处 《作物杂志》 北大核心 2021年第2期191-199,共9页 Crops
基金 国家自然科学基金“中国南方喀斯特流域结构的水文干旱驱动机制研究”(41471032) 贵州省国内一流学科建设项目“面向对象技术与多源遥感协同的喀斯特农业干旱驱动机制及其专家决策预警研究—以贵州省为例”(KT201402)。
关键词 水分亏缺指数 干旱特征 水稻 协同克里金插值 贵州省 Water deficit index Drought characteristic Rice Collaborative kriging interpolation Guizhou province
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