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气候因素、中间投入与玉米单产增长——基于河北农户层面多水平模型的实证分析 被引量:14

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摘要 河北是中国第三大玉米生产省,研究河北玉米单产影响因素具有重要意义。本文基于2003~2010年河北农户层面的4152个样本数据,建立了玉米单产及其影响因素的多水平模型,测算了各投入要素及气候因素的弹性,并对玉米单产增长率的各因素贡献率进行了分解。结果表明:气候因素对单产的影响非常敏感,玉米单产的提高主要归因于气候因素;中间投入中,种子,化肥,固定资产,劳动力的投入以及机械操作和灌溉费用的弹性均为正,但贡献率有着较大差别,种子投入的弹性和贡献率最大,其次是化肥投入,其他中间投入的贡献率均为负。因此,加强对河北省气象因素的预测预报,支持农户采用能适应气候变化的耕作制度和高品质的玉米品种,加大农业基础设施建设力度,提高玉米生产的技术水平对提高玉米单产具有重要作用。
出处 《中国农村经济》 CSSCI 北大核心 2012年第11期11-20,共10页 Chinese Rural Economy
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