| 柯西河流域干旱对作物产量的影响及其空间差异 |
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| 引用本文： | 朱冉,方一平.柯西河流域干旱对作物产量的影响及其空间差异[J].干旱区研究,2019,36(1):237-243. |
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| 作者姓名： | 朱冉 方一平 |
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| 作者单位： | 中国科学院、水利部成都山地灾害与环境研究所,四川成都610041;中国科学院大学,北京100049;中国科学院、水利部成都山地灾害与环境研究所,四川成都610041;中国科学院大学资源与环境学院,北京100049 |
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| 摘 要： | 干旱是柯西河流域中山区发生最为频繁的气象灾害之一,对农业生产造成极大的影响。利用气象、农业数据,结合线性趋势、回归分析等方法,分析了1998-2015年研究区的干旱变化特征及其对作物单产增长率的影响。结果表明:(1)研究区作物缺水指数呈先上升后下降的趋势,就作物缺水程度来看,南部干旱灾害最为严重,中部其次,北部最轻;(2)干旱对不同作物产量的影响差异显著。当0.60≤CWSI(作物缺水指数)<0.63时,小麦单产增长率受到干旱的影响;当0.63≤CWSI<0.64时,马铃薯和小麦受到干旱影响;当0.64≤CWSI<0.65时,大麦、马铃薯和小麦受到干旱影响;当0.65≤CWSI<0.66时,玉米、大麦、马铃薯和小麦受到干旱影响;当CWSI≥0.66时,玉米、大麦、马铃薯、小麦和水稻等5种作物均受到干旱影响;(3)干旱对作物产量的影响存在显著的区域差异,不同地区的作物受干旱影响的临界值和程度不同。
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| 关 键 词： | 干旱 作物产量 作物缺水指数(CWSI) 空间差异 中山区 柯西河流域 |
Impact of Drought on Crops Yield and Its Spatial Difference in the Mid-Mountain of the Koshi Basin |
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| ZHU Ran,FANG Yi-ping.Impact of Drought on Crops Yield and Its Spatial Difference in the Mid-Mountain of the Koshi Basin[J].Arid Zone Research,2019,36(1):237-243. |
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| Authors: | ZHU Ran FANG Yi-ping |
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| Institution: | (Institute of Mountain Hazards and Environment,Chinese Academy of Sciences/Ministry of Water Resources,Chengdu 610041,Sichuan,China;University of Chinese Academy of Sciences,Beijing 100049,China;College of Resources and Environment Science, University of Chinese Academy of Sciences,Beijing 100049, China) |
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| Abstract: | Drought is one of the most frequent meteorological hazards in the mid-mountain of the Koshi Basin and affects seriously the agricultural production.In this study,the meteorological and agricultural data were used to analyze the drought change and its impact on crop yield in the study area from 1998 to 2015 using the linear trend and regression analysis.The results are as follows:(1)The crop water stress index(CWSI)was increased at first and then decreased.In terms of CWSI,the drought disaster in the southern area was the most serious,then in the central area,and it was the lightest in the north;(2)The impacts of drought on different crops were significantly different.When 0.60≤CWSI<0.63,drought affected the growth rate of wheat yield per unit area.When 0.63≤CWSI<0.64,the yields of potato and wheat were affected by drought.When 0.64≤CWSI<0.65,the yields of barley,potato and wheat were affected by drought.When 0.65≤CWSI<0.66,the yields of corn,barley,potato and wheat were affected by drought.When CWSI≥0.66,the yields of corn,barley,potato,wheat and rice were affected by drought;(3)There was a significant spatial difference in the impact of drought on crop yield.The critical values and impact extents caused by drought were different from different regions. |
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| Keywords: | drought crop yield crop water stress index spatial difference the mid-mountain of the Koshi Basin |
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