大跃进以来,黃岩地区的柑桔生产連年丰产,取得了巨大的成績。但是由于缺乏某些必需的微量元素,引起桔树发生生理病害,广泛地分布于各种类型的植桔土壤上。为解决这一問題,爭取柑桔高产再高产,两年来,我們进行了黄岩地区植桔土壤中微量元素含量的測定和微量元素肥效的研究。初步研究証明,各种生理病害的分布与土壤类型是有一定关系的。黄岩地区植桔土壤主要是高度熟化的园林土壤,可分为山区的紅壤与黄壤(包括少量紫色土)和平原上的冲积土与水稻湿土。后者与水稻土交錯相邻,地下水位約为60厘米,排水不良。除山地土 Since the Great Leap Forward, the citrus production in Huangyan has achieved remarkable success year after year with great achievements. However, due to the lack of some essential trace elements, which cause physiological disease of orange trees, widely distributed in various types of orange-planted soil. In order to solve this problem and strive for high yield and high yield of citrus, two years later, we carried out the determination of trace elements in the soil planted with Huangyan and the study of the effect of trace element fertilizer. Preliminary studies have shown that the distribution of various physiological diseases and soil types have a certain relationship. The cultivated orange soil in Huangyan area is mainly highly mature garden soil, which can be divided into red soil and yellow soil (including a small amount of purple soil) in mountainous area and alluvial soil and wet soil in plain. The latter is interlaced with paddy soils, with a groundwater level of about 60 cm and poor drainage. In addition to mountain soil