茶籽萌发,胚根向下伸长形成主根,胚芽发育成幼苗的地上部分。幼苗的吸收功能靠主根根端的根毛区完成。在茶苗移栽、逐渐分枝长成茶树的过程中,主根不断地分生出各级侧根,成为一个庞大的根系。由于茶叶一年要采收多次,必然要由侧根系统从土壤里吸收更多的水分和养料,供给地上部分的需要。在侧根扩大发展的时候,主根的功能衰退了,侧根就成了茶 Germination of tea seed, root elongation down to form the main root, germ developed into the aerial parts of seedlings. Absorption of seedlings by root root root hair area to complete. Transplantation of tea seedlings, and gradually grow into tea tree branches in the process, the main roots continue to give birth to all levels of lateral roots, to become a huge root system. Since tea is harvested many times a year, it is inevitable that the lateral root system absorbs more water and nutrients from the soil to supply the needs of the above-ground parts. When the development of lateral roots expands, the functions of the main roots decline and the lateral roots become tea