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试验结合宁夏南部山区,半干旱、半干旱偏旱地区气候特点,依夏秋作物布局现状与水肥关系各效应测定,以施肥递增量与产量、纯效益、水分利用效率的关系,应用边际与回归分析方法,证实旱地秋作物无论产量绝对值或经济效益均比夏粮高。同时寻求出主要秋粮作物最大经济效益和最佳施肥区间。提出合理扩大大秋作物种植比例,以尽快促进旱地粮食总产量提高。
Based on the climatic characteristics of mountainous areas in southern Ningxia, semi-arid and semi-arid semi-arid areas, and the relationship between the distribution of crops and water and fertilizer in summer and autumn, the relationship between fertilization increment, yield, net benefit and water use efficiency was analyzed. Marginal and regression analysis Method to confirm that the dry crop yield regardless of the absolute value or economic benefits are higher than the summer grain. At the same time to find the main economic benefits of the main autumn crops and the best fertilization interval. Propose to rationally expand the planting proportion of big autumn crops so as to promote the increase of total grain output in drylands as soon as possible.