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甘肃中部地区气候干旱,土地瘠薄,农作物产量低而不稳。为促进该地农业生产的发展,1984—1988年在定西唐家堡河流域进行了旱地肥料田间试验,系统地研究了该地主要农作物的施肥技术,进行了大面积示范和推广。一、旱地化肥的经济合理施肥量 1984—1987年在定西唐家堡河流域进行了春小麦、豌豆、胡麻、洋芋、谷子、扁豆氮磷化肥用量试验,采用二因素重复D—饱和设计,共88次单项试验。选用数学模型Y=B_0+
The climate in central Gansu is arid, with barren land and low and unstable crop yields. In order to promote the development of agricultural production in this area, a field experiment on dryland fertilizer was conducted in the Jiabao River basin of Dingxi Tang in 1984-1988. The fertilization techniques of main crops in this area were systematically studied, and large-scale demonstration and popularization were carried out. First, the economical and rational fertilization of dry land fertilizers In 1984 to 1987 in Dingxi Tang Jiabao River Basin of spring wheat, peas, flax, potato, millet, lentils nitrogen and phosphorus fertilizer dosage experiments, using two factors repeated D-saturation design, a total of 88 Sub-test. Use the mathematical model Y = B_0 +