对养鱼条件差、产量低、难管理的老鱼池、小鱼池、河道,冬春必须进行整治和改造,以使来年稳产高产、高效多收。改造时应从几方面着手: 一、改浅塘为深塘。很多池塘已开挖使用多年,且多数为土建池塘,经鱼拱浪击,池埂倒塌,淤泥逐 Poor conditions for fish farming, low yield, difficult to manage the old fish ponds, fish ponds, rivers, winter and spring must be rehabilitated and rebuilt so that the coming year, stable and high yield, high yield. Transformation should start from several aspects: First, change shallow pond for deep pond. Many ponds have been excavated for many years, and most of them are civil engineering ponds,