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配合饲料喂鱼的一个显著优点是能够使鱼集中上浮抢食,进行定时定量投喂,以大幅度提高饲料利用效率,这是高产精养池塘投饲方法的一个发展趋势。但在实际养殖生产中,一些主养中下水层鱼类的精养池塘出现了主养鱼长期不上浮摄食,只在水中或池底觅食的情况,无法达到“四定”投饲要求,败坏了水质,提高了饲料系数,影响了鱼体生长,降低了养殖效率。分析其原因,主要有以下几个方面:1池塘清整不严格。这类池塘一般疏于清整,淤泥过多,在养殖过程中,大量有机质不断向水体分解释放其代谢中间产物,形成“氧债”,高温季节易造成整个池塘缺氧;加上清塘药物选择、用量不当,造成水质难以调控,病原体大量残存、繁殖,鱼病持续发生、流行,无法保证中下水层鱼类摄食、生长应有的良好生态环境。
One of the significant advantages of feed for feed is that it can make the fish focus on floating and feeding regularly and rationally and feed rationally so as to greatly improve the efficiency of feed utilization, which is a development trend of high yield intensive pond feeding method. However, in the actual aquaculture production, some main aquaculture aquaculture ponds have appeared in the main long-term non-feeding of fish feeding, only in the water or bottom of the foraging situation, can not meet the “four” feeding requirements, Corrupted water quality, improve the feed coefficient, affecting the growth of fish, reducing breeding efficiency. Analysis of the reasons, mainly in the following areas: 1 pond cleaning is not strict. Such ponds are generally neglected to clean up and have too much silt. During the breeding process, a large amount of organic matter continuously decomposes and releases the metabolic intermediates to the water to form an “oxygen debt”, which can easily lead to hypoxia in the entire pond in high temperature season. Choose, dosage is not appropriate, resulting in difficult to control the water quality, a large number of residual pathogens, reproduction, fish disease continued to occur, epidemic, unable to ensure the feeding and growth of aquatic fish should be a good ecological environment.