Abstract: The yield and quality of tea are greatly affected by temperature in spring and water supply in summer and fall. The interrelations between air temperature, earth temperature,water supply, solar radiation and the growth of new shoots are analysed in detail. The high air temperature and solar radiation in summer and fall are unfavorable for the growth of tea plant, and significant improvement of the yield and amino acid content of tea can be obtained through 35—45% shading. Water and soil erosion is also an important factor in tea production of hilly regions.Shelterbelt or shading trees and other soil and water conservation measures arc highly recommended for tea plantations of the hilly regions.

Key words: mycorrhizal fungi, function, plant evolution, remediation, ecosystem, agricultural and forest production