无产阶级文化大革命以来,柑桔生产上的一项重大改革就是栽植时采用大穴、大肥、大苗,这是坚持果树上山不与粮棉争地的一条非常成功的经验。不少地区学习这个经验,取得很大成效,创造了许多早结、丰产、优质的水果商品基地。但也有一些地区,尤其是新发展区,对这种种植方法缺乏实践经验,因而在栽植后不久出现植株下陷现象。我们曾走访了十一个公社、四个镇、四个矿、二个场,重点调查了二十六个生产大队、九个生产队、一个畜牧疡,发现植后下陷情况普遍存在,一般下陷率在40％以上,个别地下水位较高的洼地柑园全部出现下陷现象,对柑桔生产影响很大。 Since the Great Proletarian Cultural Revolution, a major reform in citrus production has been the use of large pits, fat potatoes and large seedlings in planting. This is a very successful experience in insisting that fruit trees do not compete with grain and cotton. In many areas, this experience has been learned and achieved great results. Many early fruit production bases with high yield and high quality have been created. However, some regions, especially new development areas, lacked practical experience in this cultivation method, and plant subsidence occurred shortly after planting. We have visited eleven communes, four towns, four mines and two fields. We focused on investigating 26 production brigades, nine production teams and a livestock and goiter. We found that subsidence after planting was widespread and generally subsided The rate of 40% or more, individual higher groundwater depression citrus groves all subsidence phenomenon, a great impact on citrus production.