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长期以来,庆阳旱塬冬小麦高产栽培中密度、氮肥和磷肥用量问题难以确定,科技人员和当地群众都凭经验模式进行试验和应用,致使庆阳旱塬冬小麦发展不平衡,产量低而不稳。为了探索旱塬冬小麦生产主因素作用,使庆阳旱塬冬小麦产量更上一个台阶,本试验依据系统工程的整体性原理,针对严重困扰该区粮食生产的限制因素——密度及氮肥、磷肥施用量,于1988～1991年用同一方案进行试验研究,建立了庆阳旱塬冬小麦高产栽培模式,为大面积丰产栽培提供科学依据。
For a long time, the problem of density, nitrogen fertilizer and phosphate fertilizer usage in winter wheat high-yielding cultivation in Qingyangheyuan is difficult to determine, and both scientific and technical personnel and local people experimented and applied by empirical mode, resulting in the unbalanced development of winter wheat in lowland and yieldless . In order to explore the main factor of winter wheat production in dry land, the yield of winter wheat in Qingyang dry land was even higher. According to the integrity principle of the system engineering, this study aimed at the factors that seriously plagued the grain production in the area-density and nitrogen fertilizer, Dosage, using the same program from 1988 to 1991 to conduct experimental study, the establishment of high-yield cultivation patterns of winter wheat in Qingyang dry land, providing scientific basis for large-area high-yielding cultivation.