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四川盆地土壤类型复杂,对柑桔的生长发育差异大。与Embleton标准比较,各柑桔园普遍缺少锌、硼、钼三营养元素,但更新世黄壤与石灰性紫色土有差异,前者锌、硼营养优于后音,钼营养则相反。如以更新世黄壤柑桔叶片元素含量为标准,则石灰性紫色土各柑桔园存在锌、铁、锰、镁、氮等元素营养不良问题,与该类土壤柑桔生长缓慢,树体瘦弱,常发生黄叶花叶等缺素症状等状况相符合。柑桔体内11种元素以镁素对其它元素的影响为最广泛、最重要,其次是氮素。铁、镁、钼三素含量在土壤有效量与柑桔叶片含量间存在密切的相关性。土壤中锌、钼、铁、锰四元素对柑桔体内其它元素相助或拮抗的数量较多,在4个以上,显示这些元素在土壤与柑桔营养之间的重要性。
The soil types in the Sichuan Basin are complex and have significant differences in the growth and development of citrus. Compared with the standard of Embleton, the citrus orchards generally lack three nutrients of zinc, boron and molybdenum, but there are differences between Pleistocene yellow soil and calcareous purple soil. The former is better than the latter in zinc and boron nutrition, while the other is molybdenum nutrition. For example, according to the leaf element content of the yellow earth orange in the Pleistocene, the citrus orchards in the calcareous purple soil have the problems of malnutrition of elements such as zinc, iron, manganese, magnesium and nitrogen. , Often occur yellow leaf mosaic defects and other conditions consistent. Citrus 11 kinds of elements in the magnesium on the other elements of the most extensive, the most important, followed by nitrogen. Iron, magnesium, molybdenum content of three elements in the soil available amount and citrus leaf content is closely related. Soil zinc, molybdenum, iron, manganese four element citrus complement or antagonism of other elements in the number of more, more than 4, showing the importance of these elements in the soil and citrus nutrition.