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研究粮食作物产量波动的时空变化,对于摸清和评价一个地区的气候资源,作好农业合理布局以及研究供业务应用的作物产量预报方法都有现实意义。本文对青海省解放以来粮食作物及其主要种类春小麦(下文简称小麦)、杂粮(包括青稞、玉米、豌豆等)、马铃薯的产量波动作了周期分析;为揭示产量波动在空间分布上的地区差异,对包括主要产粮区在内的18个县(市)作了聚类分析,并分析了各地稳产指数的分布特征;通过实例,解析川水、
Studying the spatio-temporal variations of grain crop yields is of great significance in finding out and evaluating the climatic resources of a region, making a reasonable layout of agriculture and studying crop yield forecasting methods for business applications. In this paper, we have conducted periodic analysis on the fluctuation of grain yield of spring wheat (hereinafter referred to as wheat), miscellaneous grains (including barley, corn, pea, etc.) and the potato since the liberation of Qinghai Province. In order to reveal the regional differences in the spatial distribution of yield fluctuation, , Cluster analysis was made on 18 counties (cities) including the main grain-producing areas, and the distribution characteristics of the stable production index were analyzed. Through examples,