茶树是多年生常绿木本植物,它的收获对象主要是叶子,因此,每年要从土壤中带走大量的矿质元素,容易引起某些元素的亏缺,产生缺乏症。茶树缺素症会影响光合产物的积累,妨碍根系和枝叶的生长,产量质量都会下降。但茶园中某些元素过量也会引起过量症,如有的茶园盲目引用硼渣作肥料,造成硼的过量症,有的生产茶园在夏秋高温季节使用氯化铵,造成氯害现象也不鲜见。中国农业科学院茶叶研究所在六十年代初期,作过氮肥用量试验(俞永明等),磷肥吸收、运转及分布的研究(陈芳等),喷施锌肥解决早春茶园紫芽问题(朱全芬等)也作过探索。七十年代初期,围绕 Tea tree is a perennial evergreen woody plant, its main harvest is the leaves, so every year from the soil to take away a large number of mineral elements, easily lead to the lack of certain elements, resulting in deficiency. Tea tree deficiency can affect the accumulation of photosynthetic products, hinder the growth of roots and leaves, yield and quality will decline. However, some elements of tea plantation overdose can also cause overdose, if some tea blindly cited boron slag as fertilizer, resulting in excessive boron disease, and some production of tea plant in the hot summer and autumn season the use of ammonium chloride, causing chlorine phenomenon is not fresh see. Tea Research Institute of Chinese Academy of Agricultural Sciences in the early 1960s, for example, the amount of nitrogen fertilizer (Yu Yongming, etc.), phosphate fertilizer, operation and distribution of research (Chen Fang, etc.), spraying zinc fertilizer to solve purple tea bud early spring Also explored. Seventies, around