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从长远的经济观点看,取得滴灌的成功必须了解滴灌对土壤化学性质的影响及如何用各种类型的滴灌系统控制根区土壤盐分和肥力,因此,必须对灌溉水质,土壤物理化学性质和作物的施肥量加以控制。 用地上和地下滴灌系统灌溉西红柿均巳取得了成功。这两种灌溉方式都可能引起土壤盐分和其他土壤性质的变化。例如土壤可交换钠的百分率(E.S.P)能影响水的运动速度和土壤肥分的损失(Clothier,1984)。
From a long-term economic point of view, successful drip irrigation must understand the effects of drip irrigation on soil chemistry and how to control root zone soil salinity and fertility with various types of drip irrigation systems. Therefore, irrigation water quality, soil physico-chemical properties and crop The amount of fertilizer to be controlled. Irrigation of tomatoes with above and below drip irrigation systems has been successful. Both of these irrigation methods can cause changes in soil salinity and other soil properties. For example, the percentage of soil exchangeable sodium (E.S.P.) affects the rate of water movement and the loss of soil fertility (Clothier, 1984).