The Characteristics of Weather Yield for Global Crop and Its Relationship with Precipitation
-
摘要: 利用全球150个国家和地区1951~1985年(部分国家为1951~1991年)小麦和水稻的原始产量及降水量资料,分析了小麦和水稻气象产量的特征、全球粮食气象产量与降水量变化的关系。结果表明,气象产量的贡献约占作物产量的3%~14%,且小麦和水稻气象产量占作物产量比重的分布具有明显的地域性。气象产量大都服从正态分布,其长期变化在地域性分布上有一定的规律,在时间分布上存在准12年、准8年和准2年周期。气象产量同降水量关系密切,欧洲、非洲中南部和南美洲大部的小麦气象产量与年降水量呈反相关,而非洲北部和中东则呈正相关,除非洲西部、孟加拉国和黑海附近等少数地区外,全球大部分国家和地区水稻气象产量与降水量呈明显的正相关。
-
关键词:
- 气象产量 降水量 周期性
Abstract: Using the original crop yield (wheat and rice) data and the precipitation data of 150 countries from 1951 to 1991, the characteristics of weather yield for wheat and rice and its relationship with precipitation are analysed. The results show that the weather yield contributes to 3% ~ 14% of total crop yield, and the distributions of proportion between them have obvious regional features. The weather yield obeys normal distribution. There exists the certain law for the long-term of weather yield in regional distribution. The weather yield is in close association with precipitation.-
Key words:
- Weather yield
计量
- 摘要浏览量: 3068
- HTML全文浏览量: 187
- PDF下载量: 2705
- 被引次数: 0