茶树是叶用植物。在一年数采的过程中,茶树需要消耗大量的营养元素,如碳、氢、氧、氮、磷、钾、钙、镁、铁、锰、硼、锌等。其中,除碳、氢、氧来自空气和水分外,其他均来源于土壤。然而,土壤中各种营养元素的含量是有限的,如不及时通过施肥加以补充,往往会导致茶树因缺乏某一种或几种营养元素而生长发 Tea tree is a leaf plant. In the course of a year’s harvest, tea trees need to consume a large amount of nutrients such as carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, iron, manganese, boron and zinc. Among them, in addition to carbon, hydrogen, oxygen from air and water, the other are from the soil. However, the content of various nutrients in the soil is limited. If not replenished in time through fertilization, the tea often grows due to the lack of one or several nutrient elements