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近年来湖泊、水库、河道、水渠等水域的水产增养殖业发展很快。由网围、网栏、网箱养鱼形成的“三网渔业”已成为大水面开发利用的一支生力军。但网围养鱼这项新技术在水库中尚未得到有效推广和应用。其原因,是受水库的某些因素的制约:诸如水库因蓄洪、灌溉而引起的水位落差变化大、水深、库底不平坦。然而,有些比如利用洼地、四周围堤而成的水库,水浅、水位落差小、库底也较平坦,类似于湖泊,为数也不少,仅天津市就有大中小型水库36座,水面25万余亩,占全市水库面积的90％以上。水质条件好,饵料生物丰富,有的水库水生植物茂密,但产量低(1989年统计,全市水
In recent years, lakes, reservoirs, rivers, aqueduct aquaculture aquaculture developed rapidly. The “Tri-net Fishery” formed by net Wai, net fence and cage fish culture has become a new force in the development and utilization of the large water surface. However, this new technology of fishnet has not been effectively popularized and applied in reservoirs. The reason is due to the constraints of certain factors in reservoirs: such as reservoirs due to flood storage, irrigation water level changes caused by large drop, the depth of the reservoir floor is not flat. However, for some reservoirs, such as the use of low-lying land and embankments, the water is shallow and the water level is small and the reservoir floor is relatively flat. Similar to the number of lakes, there are quite a few. Only Tianjin has 36 large, medium and large reservoirs, More than 25 acres, accounting for more than 90% of the city’s reservoir area. Good water quality, abundant food organisms, and some reservoir aquatic plants dense, but low output (1989 statistics, the city’s water