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一般干旱地区地下水源缺少,单靠兴修水利,技水灌溉,得不偿失。根据旱地农业的立地条件,当务之急是要采取切实措施建设好农田“水库”,这是旱地农业增产的一条有效途径。一、搞好土地加工,科学利用天然降雨。旱地农业如果耕作不当会加重干旱程度。据科学测定,在生产条件基本相同的条件下,对天然降雨利用好,每1毫米可生产0.5公斤粮食;而利用差,每1毫米降雨仅生产0.15公斤粮食。
In general arid areas lack of groundwater sources, relying on water conservancy construction, irrigation technology, outweigh the benefits. According to the site conditions of dryland agriculture, it is imperative to take effective measures to build farmland “reservoirs”, which is an effective way to increase agricultural output in drylands. First, do a good job of land processing, scientific use of natural rainfall. Dry farming aggravates the degree of drought if poorly tilled. According to scientific tests, under the same production conditions, good utilization of natural rainfall can produce 0.5 kilograms of food per 1 millimeter; but with poor utilization, only 0.15 kilograms of food is produced per 1 millimeter of rainfall.