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一、坑塘条件及改选:坑塘是鱼类栖息生长的地方,其环境条件的好坏、直接影响到鱼产量的高低,所以养鱼塘要有充足的水源、良好的水质,注排水方便。面积为3亩～10亩,水深2米,规格塘形为长方形,东西走向、长宽之比为2:1,塘底平坦稍呈凹“龟背型”,向排水处20厘米～30厘米。对于干涸和地下水贫缺的坑塘,应进行加深衬砌,其方法是根据坑塘形状,首先将塘底塘坡整平,用生石灰和粘土等制成混合灰土,铺底厚3厘米～5厘米,用机械碾压,以不渗漏水为宜,塘坡用砖
First, the pit pond conditions and re-election: pit pond is a habitat for fish growth and development, the environmental conditions are good or bad, directly affect the level of fish production, so there should be sufficient fish ponds, good water quality, drainage convenience . An area of 3 acres to 10 acres, depth 2 meters, size Tong rectangular shape, east-west, length to width ratio of 2: 1, the pond flat slightly concave Turtle type, to the drainage of 20 cm to 30 cm . For dry and groundwater pit ponds should be deepening lining, the method is based on the shape of pit ponds, first pond pond slope leveling, with lime and clay made of mixed lime soil, the bottom thickness of 3 cm to 5 cm, Mechanical rolling, not leaking water is appropriate, ponds with brick