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我省肥水资源丰富,埋藏浅,易开发,潜力大。现已查明的蕴藏面积达60多万亩,97.6％分布在关中平原。全省现有能灌溉肥水井1.2万多眼,占肥水井总数的43.7％,灌溉面积51万多亩,充分利用后可扩灌到79万亩。肥水的增产效果如何?对土壤盐分的影响怎样?如何正确开发利用高含盐量肥水等,都是值得深入研究的课题。一、增产效果肥水是水、肥兼顾的农业自然资源。每立方米含硝态氮15克以上,灌溉农作物增产效果显著。我们在泾阳县石桥、云阳公社进行了5—7年的科学利用肥水试验,取得了良好效果。石桥六队灌溉肥水比灌溉淡水的每亩增产小麦223.1斤。全大队用肥水灌小
Our province is rich in fertilizer and water resources, shallow buried, easy to develop, great potential. Has been identified with a total area of more than 60 acres, 97.6% distributed in the Guanzhong Plain. The province’s existing irrigation and fertilization wells more than 12,000, accounting for 43.7% of the total number of wells, irrigated area of more than 510,000 mu, after full use of expansion to 79 million mu. How is the yield increase of fertilizer and water? What is the impact on soil salinity? How to correctly develop and utilize high salt content fertilizer and so on are all issues that deserve further study. First, the effect of increasing fertilizer water is water, fertilizer take into account agricultural natural resources. Nitric nitrogen per cubic meter containing 15 grams or more, irrigation crops yield a significant effect. We have carried out 5-7 years of scientific utilization of fertilizers in Shiqiao and Yunyang communes in Jingyang County and achieved good results. Stone Bridge Six irrigation water than the irrigation of fresh water per mu yield 223.1 kg of wheat. Brigade irrigation with small water