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天津滨海地区地下水位较高,种植根系较长的植物,根部易深入到地下咸水层,影响植物的生长和产量。而池塘周围闲散地(池塘堤顶、斜坡、沟渠道路两侧)地势相对较高,既有利于植物的正常生长,又避免了雨水大对它造成的涝灾,同时又可充分利用了池塘周围闲散地资源,为草食性鱼类提供了廉价的饲料源。
Tianjin coastal area higher groundwater level, planting longer root plants, root easy to deep into the groundwater layer, affecting plant growth and yield. However, the relatively high terrain around the ponds (on both sides of pond dikes, slopes and ditches roads) is not only conducive to the normal growth of plants, but also avoids floods caused by heavy rainfall and at the same time makes full use of the idle Ground resources provide a cheap source of feed for herbivorous fish.