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伟大领袖毛主席亲自主持制订的《全国农业发展纲要》中指出“灌溉设施的抗旱能力,按各地不同情况,分别提高到三十天到五十天;适宜发展双季稻的地方,要提高到五十天到七十天,以保证收成”。我省各地灌溉设施的抗旱能力以多少天为宜?相应于适宜抗旱能力的水量应是多少才能实现早涝保收、高产稳产,使灌区粮食每年每亩产量达到:陕北六百斤、关中八百斤、陕南一千斤的产量指标,这是当前农田水利基本建设中急待解决的一个重大课题。现根据我省各地主要农作物需水规律,并对全省近20～40年降水资料进行分析,结合群众丰产用水经验的调查总结,提出初步意见,供讨论参考。
The “Outline of National Agricultural Development” drafted by the great leader Chairman Mao personally states that “the ability to fight drought in irrigation facilities should be increased from thirty days to fifty days according to different situations in different places; and where it is appropriate to develop double-crop rice, it should be increased to Fifty days to seventy days, to ensure the harvest. ” Drought resistance capacity of irrigation facilities around the province is appropriate? How much water should be suitable for drought-resistant capacity in order to achieve early flood retention, high and stable yield, grain yield per acre per year to achieve: six pounds in northern Shaanxi, Guanzhong Eight hundred jins and one kilogram of output in southern Shaanxi are an important issue urgently solved in the current capital construction of irrigation and water conservancy projects. Based on the law of water demand of major crops throughout the province, the precipitation data of the past 20 to 40 years in the province are analyzed. Based on the investigation and summary of people’s experiences in high-yielding water supply, preliminary opinions are provided for discussion and reference.