【摘要】 为缓解宁夏银北地区农业水资源短缺问题，根据农田排水沟水资源丰富的情况，在宁夏平罗县银北盐碱土改良试验站水稻试验田，采用田间监测与室内检测相结合的方法，研究农田排水沟的水灌溉对土壤盐碱性质及稻谷重金属的影响。结果表明：水稻生育期内试验田排水沟的水矿化度低于1.2 g/L、pH值小于8.54,属于弱矿化水和淡水；采用农田排水沟的水灌溉不会导致土壤盐碱加重及土壤、稻谷重金属含量超标；与黄河水灌溉相比，农田排水沟的水直接灌溉会减产19.7%,农田排水沟的水和黄河水掺灌、交替灌溉对水稻产量的影响差别不大。因此，在黄河水资源短缺的情况下，可以适当利用农田排水沟的水与黄河水进行掺灌或交替灌溉，以保障粮食安全。更多还原

【Abstract】 In view of the shortage of agricultural water resources and the abundant water resources of farmland drainage ditch in Yinbei region of Ningxia, the test was conducted at the Station of Saline-Alkali Soils Improvement Experiment in Pingluo County, Ningxia(106°31′E, 38°51′N) to research on the effects of farmland drainage ditch water irrigation on saline-alkali properties of soil and heavy metals of paddy through using field monitoring and indoor detection. The results show that the salinity of farmland drainage ditch water from experimental field during the rice growth period is less than 1.2 g/L and pH is less than 8.54, it belongs to the range of mildly brackish water and fresh water. The use of farmland drainage ditch water irrigation will not lead to soil saline-alkali aggravation and excessive heavy metal content of soil and paddy. Compared with the Yellow River irrigation, direct farmland drainage ditch water irrigation will reduce the rice yield by 19.7%. There is little difference between mixed irrigation and alternate irrigation on rice yield. Therefore, under the shortage of water resources in the Yellow River can be appropriate use of farmland drainage ditch water for mixed irrigation or alternated irrigation with the Yellow River water to ensuring food security.更多还原