在毛主席无产阶级革命路线指引下,近年来,南丰县在贯彻执行“以粮为纲,全面发展”的方针中,蜜桔生产发展很快,总面积已相当于文化大革命前的五倍,年总产量为文化大革命前的1.4倍,虽然连续五年获得了丰收,但产量的上升与蜜桔栽培面积发展的速度仍不相适应。究其原因主要是社、队之间产量发展不平衡,还存在着相当一部份低产桔园。约占全县结果桔园面积的三分之一。 为了弄清大面积低产的原因,我们从调查入手,发现低产桔园的多数桔树在春季新叶开始转绿时,叶面上出现黄色水渍状斑 Under Chairman Mao’s proletarian revolutionary line, in recent years, Nanfeng County has witnessed rapid development in production in terms of implementing “taking grain as its key link and all-round development” with a total area equivalent to five times that of the pre-Cultural Revolution, The total annual output was 1.4 times before the Cultural Revolution. Although the harvest had been achieved for five consecutive years, the increase in output still did not meet the speed of the development of tangerine cultivation. The main reason is the community, production and development between the team is not balanced, there are still a considerable part of low-yield orange garden. Accounting for about one-third of the county’s orangery area. In order to find out the reasons for the large area of ​​low yield, we started from the survey and found that most orange trees in low-yield orange orchard had green stains on the foliage when the new leaves started to turn green in the spring