水分是地球表面最丰富的物质,所有的生命为了生存都依赖于水分,果树也不例外,只要使一棵果树得不到充足的水分,就能观察到令人信服的结果。果园灌溉的基本目标,是供给充足的水分以保证每年有最适的产量和果实品质。因为灌溉不足和过量都是有害的,所以必须保持土壤湿度在适宜的范围内。确定这个范围,并保持土壤湿度在这个范围内是果园灌溉实践中的传统问题。 Moisture is the most abundant substance on the surface of the earth. All life depends on the water for survival. The fruit tree is no exception. Convincing results can be observed if a fruit tree does not receive enough water. The basic goal of orchard irrigation is to supply sufficient moisture to ensure optimum yields and fruit quality each year. Because insufficient and excessive irrigation is harmful, the soil moisture must be kept within the proper range. Determining this range and keeping the soil moisture within this range is a traditional issue in orchard irrigation practices.