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市郊广大农村的围沟、宅河,约二万亩左右,这些水面除有部分用于放养水生饲料外,大多没有利用。以每亩生产鲜鱼百斤计,全郊区可产鱼二万担左右,如能投草、施肥,产量还可成倍增加;而且,养鱼还能提高河泥肥效,以小肥换取大量肥料。利用田边杂草喂鱼,或以农田流失的肥料来肥水,经过鱼类采食后,鱼粪排入水中,因此,养鱼塘里的河泥肥效高,水稻田施用养鱼塘的河泥可增产10～20%。目前正值积肥的时机,我们可以结合这一工作,清除河沟里的野杂鱼,以备放养鱼
Most of the suburbs of the rural ditches, house river, about 20000 acres, except for some of these surface water for stocking aquatic feed, but did not use. The production of fresh fish per acre pound kilograms, the entire suburbs can produce fish around 20 000, if the grass, fertilization, production can also be multiplied; and, fish can also increase the effectiveness of river mud, in exchange for a small amount of small fat fertilizer. The use of farmland weed feeding fish, or farmland fertilizer to fertilizers, after fish feed, fish manure into the water, therefore, the high efficiency of the mud in the fish ponds, paddy fields of fish ponds Mud may increase 10 to 20%. At a time when fertilizer is now available, we can combine this work to remove wild trash fish in the river ditches to prepare fish for stockpiling