论文部分内容阅读
随着渔业的发展,池塘养殖中鱼病发生率越来越高,鱼病种类也越来越多,给渔业生产造成极大损失。本人结合多年实践经验,总结出一套池塘养殖过程中鱼病综合防治措施,供水产同仁们参考。1 鱼病预防措施1.1 苗种投放前的防病措施1.1.1 清除过多淤泥池塘淤泥一般以10～20cm为宜,过厚的淤泥是导致鱼病频发的重要因素。底泥中孳生有大量的致病微生物和寄生虫,底泥过厚池塘消毒和水体消毒都不能彻底。另外,淤泥中含有大量的有机物质,高温季节氧化分解,消耗水中大量的溶氧,造成水体缺氧引起鱼类浮头,甚至发生泛塘死鱼事故。淤泥中含氮有机物,在微生物作用下,产生毒性很强的氨态氮及硫化氢气体,轻则影响鱼类的摄食生长,重则引起氨中毒,特别是精养池塘在秋末初冬季节较易发生,我县已发生多起氨中毒事例。
With the development of fisheries, the incidence of fish diseases in pond aquaculture is getting higher and higher, and more and more types of fish diseases are causing great losses to fishery production. I combined years of practical experience, summed up a set of ponds in the integrated management of fish disease prevention and control measures, water supply colleagues colleagues reference. 1 fish disease prevention measures 1.1 disease prevention measures before the 1.1.1 1.1.1 cleared excess sludge pond generally 10 ~ 20cm sludge is appropriate, too thick sludge is an important factor leading to frequent fish diseases. There are a large number of pathogenic bacteria and parasites in the mud, too thick sediment pond disinfection and disinfection of water can not be completely. In addition, the sludge contains a large amount of organic matter, which oxidizes and decomposes in the high temperature season and consumes a large amount of dissolved oxygen in the water, causing the fish body floating head due to anoxia in the water body and even killing the fish in Pan Tong. Nitrogen-containing organic matter in the sludge, under the action of microorganisms, produce highly toxic ammonia nitrogen and hydrogen sulfide gas, ranging from affecting the feeding of fish growth, weight is caused by ammonia poisoning, especially the intensive pond in early autumn winter season easier Occurrence, my county has occurred more ammonia poisoning cases.