【摘要】 根据关中地区宝鸡、西安、渭南与咸阳 4地 (市 )的 1 949～ 1 999年的逐年小麦单产记录序列以及 4地 (市 )的气象观测站点自建站以来至 2 0 0 0年近 5 0年的气象记录序列 ,对关中地区小麦产量与年均温、年降水作相关分析 ;探讨了关中地区小麦单产对气候变化区域响应的评价模型。结果发现 :关中平原气候具有暖干化趋势 ;随着气温变暖 ,小麦产量增加幅度减小 ;小麦产量对降水波动的响应比对气温波动的响应显著。更多还原

【Abstract】 Based on the data up to 1999 of unit wheat yield and meteorological records up to 2000(nearly 50-year timescales),this paper analyzed the correlation among wheat yield,annual average air temperature and annual precipitation.Furthermore,this study seeks to explore the evaluation model of unit wheat yield in regional response to climate change.This study covers the area of the Guanzhong Plain,including Baoji,Xi’an,Weinan and Xianyang.We find that the plain was becoming arid and warm,the increasing amplitude of wheat yield became slow.Wheat yield in response to precipitation was more significant than that of air temperature fluctuation.更多还原