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培育好鱼种,并让其顺利度过严冬,是池塘养鱼的一个重要环节。但不少渔农对鱼种越冬缺乏足够的认识,结果由于管理不善,造成大批死亡。要想使鱼种越冬成活率高,必须采取下列技术措施; 1.选好越冬池,适时并塘。鱼种越冬池最好选择靠近水源。避风向阳,底部平坦,淤泥少,保水保肥能力强的池塘,一般面积1～3亩,水深2m左右为宜。并塘最好在立冬以后进行,当水温降到10℃时,选择晴天拉网,将鱼种分类,按不同规格分别并塘越冬,拉网时操作轻快,以免鱼体受伤感染细菌得病。 2.投放鱼种密度适当。白露以后,随着水温的下降,鱼的活动能力减弱,耗氧量降低,所以越冬鱼种的密度可以适当
Breeding fish species, and let it smooth through the winter, is an important part of fish ponds. However, many farmers and peasants lack adequate knowledge about the overwintering of fish species. As a result, due to poor management, a large number of deaths have been caused. To make the survival rate of fish overwintering, we must take the following technical measures; 1 selected wintering pool, timely and Tong. It is best to choose fish close to the water source. Shelter sunny, the bottom of the flat, less sludge, water and fertilizer and strong ability of the pond, the general area of 1 to 3 acres, depth 2m is appropriate. And the pond is best done after the beginning of winter, when the water temperature dropped to 10 ℃, choose a sunny net, the species classification, respectively, according to different specifications and Tong winter, when the net operating light, lest the fish infected with bacteria sick. 2 put the fish species density appropriate. After dew, the density of wintering species may be appropriate as the temperature of the water drops, the activity of the fish diminishes, and the amount of oxygen consumed decreases