论文部分内容阅读
冬季放养鱼种,由于气温低,鱼类活动量小,成活率高,鱼种壮,鱼鳞紧,适应能力强,又是鱼种性腺发育早期,操作时鱼体不易受伤。因而,“冬至”至“立春”是冬季放养鱼种的最佳时机。冬放鱼种前,务必进行小塘改大塘,死水塘改活水塘,浅水塘改深水塘的改造工作。放干塘水,经太阳曝晒或冰冻后,挖去多余的淤泥,仅留淤泥15—20厘米厚,并铲净杂草,加固塘埂。
Fish stocking in winter, due to low temperatures, small fish activity, high survival rate, strong fish species, tight scales, adaptability, but also the early stage of gonadal development of fish, the operation of the fish are not easy to be injured. Thus, the “winter solstice” to “beginning of spring” is the best time to stock fish species in winter. Winter fish before the species, be sure to change the small pond Tong, reservoir rehabilitation pond, shallow ponds to deepen the transformation of the reservoir. Put dry pond water, after the sun exposure or frozen, dredged excess sludge, leaving only the sludge 15-20 cm thick, and shovel weeds, strengthening ponds.