气候变化对海河流域主要作物物候和产量影响

被引:28
作者
胡实
莫兴国
林忠辉
机构
[1] 中国科学院地理科学与资源研究所
关键词
海河流域; 气候变化; 冬小麦; 夏玉米; VIP模型; 产量变化;
D O I
暂无
中图分类号
S162.5 [气候与作物生长];
学科分类号
090101 ;
摘要
基于海河流域30个气象站点1960-2009年的实测资料,分析该流域1960年以来农业气象指标的变化趋势,并利用VIP模型模拟分析大气CO2浓度增加、温度、降雨和日照时数变化对作物产量的影响。结果显示:冬季温度的显著上升使冬小麦种植北界在50年间向北移动大约70 km;在品种和灌溉条件不变的前提下,小麦产量平均每10年上升0.2%3.4%,其中CO2浓度增加、温度、降雨及日照时数变化对其产量的影响分别为11.0%、0.7%、-0.2%和-6.5%;大气CO2浓度增加的产量正效应大于日照时数减少的负效应。气候变化使夏玉米产量呈下降趋势(0.6%3.8%/10年),其中大气CO2浓度增加、温度、降雨及日照时数变化对其产量的影响分别为0.7%、-3.6%、-1.0%和-6.8%,温度上升和辐射下降是玉米产量下降的主要原因。研究结果可为气候变化影响的评估和适应性对策制定提供科学依据。
引用
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页码:3 / 12
页数:10
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