茶树是多年生的叶用作物，一年四季常绿，因此，对水分的要求较高。它的需水量要比其他木本植物多，要求年降水量在1000mm以上，而且各月降水的分布也要与茶树需水量相适应，特别是生长季节对水分的要求更加迫切。我国多数某区夏秋季节气温高、降水量少，对茶树生长不利。例如 Tea tree is a perennial leaf crop, evergreen throughout the year, therefore, the higher water requirements. Its water requirement is more than that of other woody plants, and annual precipitation is required to be over 1000mm. Moreover, the distribution of precipitation in each month should be adapted to the demand of tea tree, especially the growing season. Most of China’s summer and autumn, a certain area of ​​high temperature, less precipitation, the growth of tea adversely. E.g