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在茶园中种遮荫树,使光照强度下降30～40%,散射辐射量增加6～15%;冬春季气温提高0.5～2.0℃;夏季气温降低0.5～4.0℃;土壤绝对含水量增加17～41%;空气相对湿度提高2～20%。用塑料薄膜覆盖茶树,也有相似的生态效应。因此,遮荫或覆盖可以提前7～10天采茶。
Planting shade trees in the tea plantations reduced the light intensity by 30-40% and the amount of scattered radiation by 6-15%; the temperature in winter and spring increased by 0.5-2.0 ℃; the temperature in summer decreased by 0.5-4.0 ℃; the soil absolute water content increased by 17-40% 41%; air relative humidity increased by 2 to 20%. Covering tea trees with plastic film also has similar ecological effects. Therefore, shade or cover can pick tea 7 to 10 days in advance.