| 王位泰,张天锋,姚玉璧,王润元,郭江勇,黄斌.黄土高原夏半年降水气候变化特征及对作物产量的影响[J].干旱地区农业研究,2008,(1):154~159 |
| 黄土高原夏半年降水气候变化特征及对作物产量的影响 |
| Climate change character of precipitation during the half year of summer and its impact on crop yield in the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2008.01.28 |
| 中文关键词: 黄土高原 夏半年 降水 时空分布 粮食产量 |
| 英文关键词:Loess Plateau half-year of summer precipitation space-time distribution grain yield |
| 基金项目:科技部科研院所社会公益研究专项“西北农作物对气候变化的响应及其评价方法”(2005DIB3J100) |
| 作者 | 单位 | | 王位泰 | 甘肃省干旱气候变化与减灾重点实验室,中国气象局兰州干旱气象研究所,甘肃 兰州 730020；庆阳市气象局,甘肃 西峰 745000 | | 张天锋 | 庆阳市气象局,甘肃 西峰 745000 | | 姚玉璧 | 甘肃省干旱气候变化与减灾重点实验室,中国气象局兰州干旱气象研究所,甘肃 兰州 730020 | | 王润元 | 甘肃省干旱气候变化与减灾重点实验室,中国气象局兰州干旱气象研究所,甘肃 兰州 730020 | | 郭江勇 | 甘肃省干旱气候变化与减灾重点实验室,中国气象局兰州干旱气象研究所,甘肃 兰州 730020；庆阳市气象局,甘肃 西峰 745000 | | 黄斌 | 庆阳市气象局,甘肃 西峰 745000 |
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| 中文摘要: |
| 利用黄土高原56站夏半年(410月)降水总量资料,分析了其空间基本分布特征,用EOF、REOF方法对平均降水总量进行了气候分区,用方差分析方法分析了其时间变化特征,对比分析了多雨年和少雨年降水对冬小麦及玉米产量的影响。结果表明:黄土高原夏半年降水具有明显的南北和东西差异,可分为6个气候分区,不同区域降水的年代际变化明显;在时间分布上少雨年份和多雨年份交替出现,自1986年以来降水总量趋于减少趋势;对比分析表明,上年710月和当年46月多雨使冬小麦产量增加420720 kg/hm2,少雨使冬小麦产量减少180660 kg/hm2,当年49月多雨使玉米产量增加435 kg/hm2,少雨使玉米产量减少435 kg/hm2。 |
| 英文摘要: |
| It makes use of 56 stations’ precipitation gross data in the half-year of summer from April to October in the loess plateau,analyzing their basal space distributing character and average gross precipitation with the EOF and REOF methods,and analyzing the time change character with variance analysis method.The effect of precipitation on the yield of winter wheat and maize in less and more rainfall years was also analyzed.The result showed that the precipitation during the half-year of summer had distinct difference from south to north and from east to west,and it might be divided into six regions.In different regions, the precipitation changed distinctly every year.The year of rain shortage and the year of rain abundance alternately appeared about time distribution,and the precipitation gross took on reducing trend from 1986.Contrast analysis showed that winter wheat yield increased by 420～720 kg/hm2 if the there was plenty rainfall in July to October last year and April to June the same year,while the yield reduced by 180～660 kg/hm2 if the rainfall was too little.Plenty rainfall made the yield of maize increase by 435 kg/hm2,while too little rainfall made it reduce by 435 kg/hm2 in April to September in the same year. |
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