几年来采用的“口袋式”(串池子)灌溉法是在斗渠的上部开2—3个引水口,一个个池子往下串,一直到斗渠的下部开几个排出口。这样灌溉的结果,一直表现着:在一个斗渠内,上游水稻生育好,产量高,而下游灌溉水由混浊变为澄清,水稻生育不好,产量低(见 In recent years, the “pocket ” (string pool) irrigation method is to open the upper part of the ditch 2-3 openings, one pond down the string, until the lower part of the ditch to open a few outlets. As a result of this irrigation, the performance of the upper reaches of the rice paddy has been well-developed and high in a ditch, while the downstream irrigation water has turned from turbidity to clarification, rice has poor fertility and low yield (see