前言四川甜橙栽培面积较广,各地区均有一些甜橙低产园,在发展柑桔生产上,除扩大新建果园外,如何提高现有甜橙低产园的产量,这是甜橙生产上亟待解决的问题。几年来在学习总结贫下中农生产经验的基础上,调查研究甜橙低产原因,开展群众性的科学实验和专题研究。我省甜橙园多分布浅山丘陵地区,成土母岩多为紫色页岩,土壤瘠薄,保水保肥力 Preface Sichuan orange cultivation area is wider, there are some sweet orange low-yielding areas in all regions, in the development of citrus production, in addition to expanding the new orchard, how to improve the existing sweet orange low-yielding garden production, which is the urgent need for orange production solved problem. Over the past few years in learning to summarize the experience of poor peasants on the basis of production, investigation and research on the causes of low-yield orange, to carry out mass scientific experiments and special studies. Sweet orange garden in our province more distribution of shallow hills, into rocky mother rock mostly purple shale, soil infertility, water and fertilizer