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生物调控防治池塘蓝藻技术 总被引:2,自引:0,他引:2
一、蓝藻对水体的危害 1.蓝藻“水华”中以微囊藻占绝对优势,微囊藻的大量繁殖抑制了其他浮游植物的正常生长,对鱼类有利的浮游动、植物的生长繁殖就受到很大的影响。2。池塘中出现蓝藻“水华”时,水体表面形成一层“绿色浮渣”,水体的水质开始恶化,降低水体的透明度,增加浊度,水面被藻类遮盖, 相似文献
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2000年7月中旬,正值鱼类快速生长之机,我市百花水库大面积出现蓝藻,整个库水一片翠绿,这是我市大水面养殖中从未出现过的现象。检查所养花白鲢体质明显消瘦。局场办公会决定组织科技人员攻关治疗。池塘蓝藻常规防治方法是:一旦蓝藻大量繁殖在水面形成翠绿色水华时,多用硫酸铜、硫酸亚铁合剂(5∶2)0.7毫克/升或生石灰治疗。但治疗效果并不十分理想,其原因主要是:一是蓝藻繁殖速度快,一旦形成优势种群,即使当天用药见效,过一两天又会大量繁殖出现;二是蓝藻不是花白鲢喜食的藻类。鉴于上述情况,又针对水库水面大(百花水库为小Ⅰ… 相似文献
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《Aquaculture (Amsterdam, Netherlands)》1987,65(2):141-148
The effectiveness of potassium ricinoleate as a selective blue-green algicide was investigated in experimental channel catfish, Ictalurus punctatus, culture ponds. Five ponds were treated with 0.8 mg/l potassium ricinoleate three times per week from May through October and five ponds served as controls. Treatment did not affect concentrations of chlorophyll-a, total and un-ionized ammonia-nitrogen, or dissolved oxygen; nor did it affect average hours of supplemental aeration or net fish production. The mean nitrite-nitrogen concentration in control ponds was higher (P<0.05) than that in treated ponds, but concentrations of nitrite never reached levels considered detrimental to the health of the fish. Treatment did not reduce the incidence or percentage of blue-green algae in phytoplankton communities and did not prevent severe episodes of off-flavor in fish from treated ponds. 相似文献
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近几年来 ,池塘养蟹在豫北地区发展迅速 ,但商品蟹平均规格一般在 75g/只以下 ,养殖效益偏低。经调查认为规格偏小主要是本地饲养河蟹品种太杂、养殖方法不当所致。为此 1999年 4月~ 2 0 0 0年10月我们在新乡一枝梅渔场进行了长江水系中华绒螯蟹的养殖试验。经过两年的探索 ,达到了预期的目标 ,现将池塘养殖长江蟹的试验情况报道如下 :1 材料与方法1 1 池塘条件该渔场位于河南省新乡市延津县的黄河故道大沙河边。该区域日照指数 2 330hr ,年平均水温 14℃ ,总积温 4 780℃ ,无霜期 2 12天 ,地下水位高。渔场共有水面 138亩 ,原为养鱼… 相似文献
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化感作用与养殖池塘中铜绿微囊藻的防治 总被引:3,自引:0,他引:3
化感作用主要的作用机制是影响藻细胞的细胞膜、光合作用和能量产生步骤以及能量使用过程;次要的机制是影响呼吸过程以及酶的作用。介绍了化感作用的概念、抑藻机理、可利用方式及化感作用与铜绿微囊藻防治的关系,展望了化感作用防治铜绿微囊藻在池塘体系中的发展前景。 相似文献
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随着精养池塘富营养化的日趋严重,微囊藻水华也大量出现,微囊藻水华形成后又向水体排放含N、P、C物质和一类单环七肽的生物毒素,加剧水质恶化,给鱼类生长以及渔业生产的发展带来很大的影响。我们从微囊藻水华形成的环境因子入手,应用药物清杀,给全水泥衬砌池塘回填粘土,在池塘底泥中种植小麦,在微囊藻水华大量出现时增放红草鲫鱼等综合方法,成功地抑制了微囊藻水华的形成和发展。 相似文献
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E.A. Seymour 《Aquaculture (Amsterdam, Netherlands)》1980,19(1):55-74
It has been demonstrated that large quantities of ammonia may be released into the water of a fish pond following the collapse of an algal bloom. Some blue-green algae are thought to release toxins. This paper puts forward another explanation for this occurrence. A review of the disease known as Infectious Dropsy of Carp (IDC) based on the findings of this paper shows it to be caused by ammonia. Various methods to counteract this disease are described. Particular emphasis is placed on the policy concerning the addition of fertilizers. It is shown that dense blooms of nitrogen-fixing algae can be controlled by manipulation of the nitrogen: phosphorus balance of ponds. Determination of the aetiology of carp dropsy will probably lead to a better understanding of other diseases of fish which are manifested by similar symptoms. The disease of trout known as Viral Haemorrhagic Septicaemia (VHS) is discussed in this context. For clarification it is proposed that infectious dropsy of carp be renamed Environmental Ammonotelic Syndrome (EAS). 相似文献
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细胞凝集素探针对典型赤潮生物的定量检测 总被引:1,自引:0,他引:1
采用14种异硫氰酸荧光素(FITC)标记的细胞凝集素探针对23株典型的有害赤潮生物进行了检测,结合流式细胞仪、荧光显微镜、荧光分光光度计对探针标记区分和识别目标藻的特异性和有效性进行定性和定量测定。结果表明,DBA可以把裸甲藻(Gymnodinium)GIXM01株与其他裸甲藻区分开:SBA、WGA和PNA探针能定性或定量地区分形态相似的裸甲藻GMDH01和TPXM01。PHA-E和SJA能分别将塔玛亚历山大藻(Alexandrium tamarense)ATDH04、ATMJ02株系与同种其他的藻株区分开:PNA也能从同种其他株系中识别塔玛亚历山大藻ATDH01,ATDH02,ATDH03株系:UEAⅠ能从同种藻株中识别塔玛亚历山大藻ATCI01.JN、ATCI01藻株;RCA120可以区分产毒水平不同的亚历山大藻属(Alexandrium)的ASPGX01和ASPGX02。DBA、SBA、PNA和LCA探针能定性和定量区分微小原甲藻(Prorocentrum minimum)PMDH01和PMXM01;而PNA探针仅能定量区分原甲藻属(Prorocentrum)PDDH01与PMXM01。用WGA探针结合流式细胞仪、荧光显微镜、荧光分光光度等检测手段可以把探针标记的目标裸甲藻GSPXM01和TPXM01从米氏凯伦藻(Karenia mikimotoi)、东海原甲藻(P.donghaiense)和微小原甲藻(P.minimum)等组成的混合样品中区分开。[中国水产科学,2008,15(2):279-292] 相似文献
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在天津地区利用闲置虾池开展点带石斑鱼的养殖试验,从饵料、水质、疾病控制等方面进行探讨,取得点带石斑鱼养殖的成功。4个养鱼池,面积合计5600 m2;共获500~650 g/尾点带石斑商品鱼4673尾、2570 kg,成活率93.50%;单产4590 kg/hm2,经济效益20.1万元/hm2。验证了"南鱼北养"的可行性。 相似文献