共查询到18条相似文献,搜索用时 78 毫秒
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盐碱地水产养殖技术100问(一) 总被引:2,自引:0,他引:2
我省是一个贫水的省份,内陆养殖用水日趋紧张,但我省的地下半咸水和盐碱荒地资源丰富,开发利用这些资源,将会对我省水产业发展提供更广阔的空间。中国水产科学院东海水产研究所连续几年在沧州市研究利用地下半咸水开发盐碱荒地养虾项目取得了阶段性成果,解决了盐碱荒地利用中的关键技术难题。在此基础上,我省水产部门立项推广该成果。为了配合项目开展,进一步开发利用覆盖沧州、保定、邯郸、衡水、廊坊、唐山的荒废盐碱地资源,促进农民增收和农村经济综合发展,本刊拟连续刊登中国水产科学院东海水产研究所王慧研究员编写的“盐碱地水产养殖技术100问”。希望读者学习并从中受益。 相似文献
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盐碱地水产养殖技术100问(五) 总被引:1,自引:0,他引:1
49影响对虾养殖的主要水质因素有哪些? 对于利用盐碱水养殖对虾来说,首先应考虑水质类型、特点,包括离子组成、碱度、pH值、盐度等,对盐碱地开展南美白对虾养殖十分重要.南美白对虾对盐度适应范围比较广,但在养殖期间应注意尽量减少盐度大幅变化.其次是水温,最适温度是对虾快速生长的前提,在最适温度条件下,对虾代谢旺盛,摄食量增加,且消化的效率高,生长速度快.南美白对虾生长适宜温度在25~30℃.还有是溶解氧,水中的溶解氧是对虾赖以生存的必要条件,是衡量水质好坏的重要指标,也是影响产量的主要因素.以上三个是盐碱地水产养殖必须重点关注的水质因素. 相似文献
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青虾又名河虾,学名日本沼虾,英文名shrimp。隶属甲壳纲,十足目,长臂虾科。在我国分布较广.是我国淡水虾类中个体较大的一种。青虾食性属杂食性偏食动物性,它肉质鲜美,营养丰富,是深受广大消费者欢迎的特种水产品之一。最适合生长水温为18-30℃,4℃以下进入越冬期,不蜕壳.10℃以上活动力加强,摄食量逐步增加。青虾喜欢栖息在水草丛生的缓流处.夏秋季青虾在岸边浅水处寻觅食物.进行生长和繁殖.冬季则移到较深的水区越冬,很少摄食和活动。 相似文献
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盐碱地池塘养殖南美白对虾技术总结 总被引:2,自引:0,他引:2
南美白对虾以其生长速度快,盐度适应范围广,抗病力强,饲料营养要求低等特点,成为当今世界公认的三大优良虾种之一。近几年在我国北方开始大面积推广养殖。2001年,我们引进南美白对虾苗种31万尾,利用黄河三角洲滨海重盐碱地渗水与淡水混合进行离子调节后作为养殖用水,经142天的养殖,共产商品虾5586公斤,平均规格13.6厘米,回捕率82.6%。1 池塘条件及池水调兑:试验选在利津县明集乡的5个池塘进行,池塘总面积30亩,有效水深2.0米,池塘为新开挖的,单池配备ZY3G叶轮增氧机两台。进水后用5~10ppm漂白粉或O.1ppm的二氧化氯消毒一次,养殖池水由盐碱地地下渗水(S=20‰左右)与黄河水混合后,配兑为10~15%0的盐度,由于渗水中钾离子偏低,再添加70~100ppm氯化钾后作为养殖用水。 相似文献
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鱼作为人类动物蛋白的主要来源之一,约占全球人口动物蛋白摄入量的1/6.水产养殖产量的增加是由于野生鱼捕获量减少,水产养殖需要弥补这部分的减少.此外,全球人口的增加进一步导致了对鱼的需求相应增加.根据SOFIA的数据预测,到2030年,世界鱼的总产量将增至2.4亿吨(FAO,2020).近年来,水产养殖业已经成为食品生产... 相似文献
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Alvin M. Doroteo Fiona L. Pedroso James David M. Lopez Mary Jane S. Apines-Amar 《Aquaculture International》2018,26(4):1095-1107
Integration of tilapia to shrimp culture is currently being practiced to minimize the growth of pathogenic luminous bacteria. The microorganisms that are associated in tilapia may contribute to the inhibition of the growth of Vibrio harveyi through the production of secondary metabolites. In this study, two Bacillus strains (MJA1.1, MJA2.1) isolated from mucus of tilapia were evaluated for their possible application in shrimp culture. The inhibitory property of these isolates against V. harveyi was determined in vitro using co-culture assay in a liquid medium. Also qualitative extracellular enzyme assay was conducted to assess whether the bacterial isolates produce extracellular enzymes. Furthermore, the potential use of these isolates as shrimp feed additive was tested. Thereafter, shrimps were exposed to lethal dose of ammonia (140 mg l?1) to test the effects of the isolates in vivo. The results showed that in vitro co-culture assay after 72 h caused a significant decline in the population of V. harveyi in treatments with potential probiotic isolates. Both isolates showed protease, amylase, and cellulase activities. Although no significant difference was observed in growth, survival was significantly higher in shrimp fed with diets added with either of the isolates. The shrimp exposed to lethal dose of ammonia demonstrated better survival when supplemented with the probionts compared to the control group. Thus, the efficiency of the isolates in inhibiting V. harveyi population and the improvement of survival and resistance of cultured shrimp to ammonia stress indicate their potential as probionts for shrimp culture. 相似文献
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