广西粮食生产演变特点研究

采用数据统计与对比分析方法对1990-2007年广西粮食生产的演变特点进行了研究。结果表明：广西各年粮食总产占全国的比例相当稳定；全区粮食总体趋势为面积下降，单产提升，总产徘徊；农业结构调整是粮食面积下降的最根本原因；稻谷面积及其占粮食作物的比重波动下降，而玉米、大豆面积上升；玉米、大豆等旱粮的单产提高幅度明显高于水稻；35个粮食主产县（市、区）对全区有决定性影响，左右着全区粮食走势。

The study of gran production's evolution characteristics in Guangxi

To study the evolution characteristics of grain production in Guangxi in 1990--2007 by means of the statistical data and comparative analysis, the results showed that the total grain output of Guangxi account for a stable proportion in the country＇s total; the overall trend for Guangxi represents the features of grain crop area decline, yield increase and steady total output. The adjustment of agricultural structure is the main reason of grain crop area decline, rice area waving decline, the corn-soybean area increase, significant corn-soybean yield/mu increase （ higher than rice）. 35 major grain-producing counties have a decisive impact on the trends of Guangxi grain production.