摘要
汾河灌区地面灌溉水源严重短缺，影响着灌区农业生产发展。但灌区内存在着大量未开发的浅层咸水资源，这部分水资源属于劣质高矿化度水。为了利用这部分水源进行农田灌溉，对其进行了试验研究。研究表明：盐分对作物的危害及对产量的影响小于水分，因此，要首先保证作物的需水要求；利用成水灌溉，只要控制土壤含盐量、水分、相对溶液浓度指标不超过作物耐盐限度，就可以保证农业增产；试验冬小麦、春玉米、棉花用咸水灌溉分别比不灌溉的旱作物增产60．0％、33．7％、30．2％；要想进一步提高作物产量，须根据水源情况，实行咸、淡水轮灌；在每年有一次大定额河水灌溉和地下水有一定的径流条件下，用咸水灌溉，不会使土体长期积盐。
篢he severe shortage of water resource in Fenhe irrigation region influence the local agricultural devel-opment. However, there are lots of undeveloped shallow salt water resource in the region that are high mineralized water with poor quality. In order to use this resource for land irrigation, test and research have been carried out. The results show that the influence of salt is less than that of water to grain yield,thus, the first importance is to ensure crop's water demond; the agriculture Production can be ensured to increase if the soil salt content, moisture and solution relative salt concentration are not over the salt-resistant limit of the crop when use salt water for inigation; and the salt water irrigated winter wheat, spring corn and cotton were increased yield by 60%, 33. 7,% and 30. 2% respectively than that of dry planting. It is necessary to irrigate by circulation of salt water and fresh water according to water resource conditions in order to promote further crop production. Under the conditions of having large volume of river flow and certain underground water, irrigation by using salt water will not alkaline soil for long term.
出处
《人民黄河》
CAS
北大核心
1997年第9期28-31,共4页
Yellow River
关键词
咸水灌溉
土壤
含盐量
矿化度
灌溉
salt water, irrigation, soil salt content, mineralized degree, Fenhe irrigation region
