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固定化微生物技术及其在养殖水体中的应用 总被引:8,自引:0,他引:8
介绍了固定化微生物技术的定义,固定化微生物的制备方法,并重点介绍了固定化微生物技术在养殖水体中的应用以及存在的问题和展望。 相似文献
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正从事过水产养殖的人们都知道,当池塘经过一段时间养殖后,池水中细菌、病毒等有害因子逐渐增多,养殖水环境随之日趋恶化,如果不及时对养殖水体中有害因子进行消毒杀菌处理,就很容易引发虾病或鱼病,给养殖者带来经济损失。因此,在水产养殖过程中,人们通常对养殖水体进行定期和不定期消毒杀菌处理,以减少池水中致病细菌和病毒等有害因子,改善养殖水环境,营造优良的养殖对象生存生活环境。但一直以来,由于水产养殖没有专用机械消毒工具 相似文献
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水光学杀菌技术(Hydro-Optic-Disinfection,HOD)突破了传统光学杀菌的设计模式,利用光纤原理,即全反射的原理来提高杀菌效率。HOD是一种管道式杀菌器,对流经的水进行短时杀菌,以保证出口的水达到无菌要求。[第一段] 相似文献
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水光学杀菌技术(Hydro-Optic-Disinfection,HOD)据以色列安特兰德公司上海办事处顾悦先生报道,水光学杀菌技术突破了传统光学杀菌的设计模试,利用光解原理,即全反身的原理来提高杀菌效率。HOD是一种管道式杀菌器,对流经的水进行短时杀菌,达到保证出口的水可达到无菌要求。目前水光学杀菌技术已在大麻哈鱼和对虾养殖中得到应用。HOD具有广谱杀菌能力,对病毒、真菌、寄生虫以及细菌均有很好的效果。根据报道,采用HOD方法能明显增加养殖的产量,提高幼鱼的成活率、饲料转换效率。 相似文献
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二氧化氯及其在水产养殖中的应用技术初探 总被引:1,自引:0,他引:1
目前二氧化氯已广泛应用于食品、食品加工业、饮料工业、纸浆漂洗、饮用水消毒、污水处理、除臭和保鲜,甚至用于人的口腔消毒。它被世界卫生组织(WHO)列为A1级高效安全消毒剂。但由于该消毒剂的特殊性,在推广过程出现伤人死鱼等事件。现就二氧化氯及其在水产养殖中应用问题作初步探讨。1二氧化氯消毒杀菌原理及制剂种类比较1.1二氧化氯消毒杀菌的原理二氧化氯分子式为ClO_2,分子量是67.45。二氧化氯在常温下为黄红色气体或红色爆炸性的结 相似文献
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(3)治疗①因烂皮、刺激性强的药物尽量避免使用,可用有机碘2~3克/米~2水体消毒,连用2次,隔天一次。电解多维3克/千克饵料 鱼肝油2克/千克饵料 诺氟沙星(说明书1.5倍量),连喂7天,每天两次。②用高锰酸钾-冰乙酸合剂3克/米~2水体全池泼洒,磺胺-六-甲氧嘧啶拌料投喂5~7天 电解多维。 相似文献
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Experiments were conducted to determine the performance of larval walleye (Stizostedion vitreum) reared in clear, 0.2 nephelometric turbidity units (NTU), and turbid water, 20 or 50 NTU, on formulated feed. Larvae were cultured for 21, 28, or 30 days posthatch in four trials with 3 or 4 replicate tanks per treatment (clear and turbid) in each trial. Duration of each trial was dependent on the arrival of newly hatched larvae for subsequent trials. The desired turbidity levels were obtained by pumping a solution of clay to the culture tanks every 20 (trial 1) or 30 min (trials 2, 3 and 4). Other than turbidity, all environmental conditions (dissolved oxygen, alkalinity, pH, total ammonia, un-ionized ammonia, nitrate, nitrite, chloride, and hardness) and rearing techniques were similar between treatments. Larvae were stocked at 20/L and fed formulated feed (Fry Feed Kyowa B-400 and B-700) every 3 to 7 min, 24 hours per day. Significant differences in feed acceptance and total length between larvae in the clear and turbid water were observed as early as 7d posthatch. Larvae in turbid water began eating the formulated diet one to two days before those in clear water. In all trials, survival, final length, and final weight of larvae reared in water of high turbidity were significantly greater than for larvae reared in clear water. Mean survival (±SE) for all four trials was 27.7 ± 5.6% in high turbidity water and 5.9 ± 1.3% in clear water. At the end of the trials, mean total length of the larvae reared in turbid water was at least 3.2mm (15%) greater than that in the clear water. Mean final weight of the larvae from turbid water was 2.25 times greater than larvae from clear water over the four trials. In two of the four trials, gas bladder inflation (GBI) of larvae reared in high turbidity was significantly greater than for fish reared in clear water, but the difference in GBI was not significant in the other two trials. In this study, performance of larval walleye was greatly enhanced by water with a turbidity of at least IS NTU. 相似文献
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本文通过对厦门湾及其沿岸的海水养殖鱼类疾病种类、病原、流行情况和防治方法进行调查,总结出常见疾病15种,其中病毒性疾病3种,细菌性疾病4种,寄生虫性疾病6种,其它疾病2种.对疾病的发生原因和防治对策加以重点阐述. 相似文献