气候变化背景下河北省冬小麦气候适宜度研究

来源 :2009农业环境科学峰会 | 被引量 : 0次 | 上传用户:lynnxiao
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  在全球气候变化背景下,河北省冬小麦生育期内的平均气温呈逐年上升趋势,日照时数呈逐年下降趋势,降水量变化趋势虽不太明显,但年际间变化幅度较大.运用模糊数学理论结合冬小麦生理特性,建立了冬小麦气候适宜度模型,对1960-2005年度河北省冬小麦历年全生育期和各生育期的温度隶属度、日照隶属度、降水隶属度以及气候适宜度进行计算.结果表明,河北省冬小麦的温度隶属度和日照隶属度较大,一般在0.8以上,降水隶属度较小,一般在0.4以下,说明河北省光热资源一般能够满足冬小麦生长发育需要,而降水条件是冬小麦产量形成的限制因素;河北省冬小麦历年的气候适宜度、温度隶属度、日照隶属度和降水隶属度均为下降趋势;冬小麦返青期、拔节期和分蘖期的气候适宜度变化幅度较大,这与河北省的天气特点是一致的.
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