柑桔是我国南方各省区主要水果之一,多种植在坡岭地上,面积约600万亩,居世界第三位。由于坡岭地灌溉困难,据统计85％的桔园没有灌溉设施,桔树常受干旱威胁,形成多年不结果的小老树。加上重栽轻管,管理粗放,结果迟,产量低,全国平均亩产约750公斤,比世界柑桔主产国低一半。发展灌溉,是柑桔增加总产,提高单产的重要措施之一。 Citrus is one of the main fruits of the provinces and autonomous regions in south China. It is planted on the slopes of the ridge with an area of ​​about 600 mu and ranks the third in the world. Due to the difficulty of irrigation in the slopes, it is estimated that 85% of the orange groves have no irrigation facilities and the orange trees are often threatened by drought and form small old trees that have not come to fruition for many years. Coupled with replanting light tube, extensive management, the results of late, low yield, the national average about 750 kilograms per mu, less than half the world’s main producing countries of citrus. The development of irrigation is one of the important measures to increase total output and increase yield of citrus.