共查询到19条相似文献，搜索用时 218 毫秒
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通过在养殖池塘应用纳米生物助长器,对纳米生物助长器在罗非鱼鱼种养殖生产的性能进行了比较。结果表明:在罗非鱼鱼种养殖池塘放置纳米生物助长器,对提高产量、提高成活率、降低饲料系数、提高饲料蛋白质效率具有积极的正效应,试验组与对照组相比总产量、成活率、饲料蛋白质效率分别提高15.53%、24.15%、8.95%,饲料系数降低8.25%。并对纳米生物助长器的增产作用进行了分析,提出了在淡水池塘中应用纳米生物助长器清洗和晾晒周期的建议。 相似文献
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20 0 2年 ,我们选择 51 0亩池塘 ,进行应用强的纳米 863生物助长器养鱼对比试验 ,取得了一定成效 ,现将试验情况及结果总结如下 :1 试验材料及方法1 .1 材料1 .1 .1 试验池塘条件 :池塘面积 1～ 5亩 ,水深 1m左右 ,水源条件差 ,基础设施老化。1 .1 .2 强的纳米 863生物助长器 (南昌纳m高新技术开发有限公司生产 )1 .2 方法将 51 0亩池塘分成两组、试验组 2 57亩( 79口池塘 )、对照组 2 3 3亩 ( 79口池塘 ) ,试验组用强的纳米 863生物助长器 ,处理水、青草、饲料进行养鱼。对照组按常规方法进行养鱼两组池塘的鱼种放养量、饲料的投喂、… 相似文献
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光合细菌联合EM菌对广西拟水龟幼龟养殖的影响 总被引：1，自引：0，他引：1
以广西拟水龟幼龟为试验动物,探讨光合细菌联合EM菌对其养殖的影响,从而为广西拟水龟的生态健康养殖提供科学依据。试验分两组,即对照组和试验组,每组2个重复,养殖试验时间为一年,试验结束起捕计算幼龟的均末重、成活率、增重量、畸形数以及饵料系数作为生产性能的评判指标。试验组与对照组相比,龟的均末重、成活率、增重量分别提高26.8%、6.8%和35.9%,而畸形率、饵料系数分别降低580%和27.2%。说明光合细菌与EM菌能提高幼龟机体的免疫力,拮抗病菌病原,促进幼龟生长、提高成活率和增重率、降低畸形率和饵料系数、消除养殖环境恶臭的作用,可在全区全面推广应用。 相似文献
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采用单因子试验设计在凡纳滨对虾(Litopenaeus vannamei)基础日粮中添加不同浓度的低聚木糖,分别为0(对照组)、0.01%、0.03%、0.05%,共4个处理,每个处理3个重复,饲养56 d,研究了低聚木糖对凡纳滨对虾生长性能、体组成和非特异免疫的影响。结果显示:低聚木糖对对虾末重、增重率和特定生长率均无显著影响(P>0.05),但试验组对虾末重、增重率和特定生长率均高于对照组,试验组饵料系数均较对照组下降,其中0.03%组饵料系数显著低于对照组(P<0.05),试验组饲料效率较对照组均有提高,其中0.03%组获得显著提高(P<0.05);血清免疫指标过氧化物酶(POD)、超氧化物歧化酶(SOD)、溶菌酶(LSZ)和酚氧化酶(PO)活力试验组均较对照组有所增加,分别提高了1.27%~5.16%(P>0.05)、0.17%~8.93%(P>0.05)、9.24%~12.61%(P>0.05)和4.17%~66.67%(P<0.05),血清蛋白含量增加了9.72%~39.64%(P<0.05);试验组体蛋白含量较对照组升高,其中0.01%组虾体蛋白质含量最高,且显著高于空白组(P<0.05)。在凡纳滨对虾料中添加低聚木糖有促进生长、降低饵料系数和提高饲料效率的趋势,并提高对虾非特异免疫力的趋势,对对虾体组成除蛋白质外没有显著影响。 相似文献
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生态基对大口黑鲈池塘养殖系统水质及能量收支的影响研究 总被引：1，自引：0，他引：1
为摸清生态基养殖池塘系统的能量流动规律,以放置生态基的大口黑鲈(Micropterus salmoides)池塘为研究对象,采用原位实验方法,研究了生态基对大口黑鲈池塘养殖系统的水质及能量收支的影响。实验期间,生态基可显著降低池塘水体中氨氮、硝态氮、总氮及总磷含量(P0.05),但对亚硝态氮、磷酸盐、底泥总氮和总磷含量无显著影响(P0.05);饵料投入是系统能量输入的主要来源,分别占对照组和实验组总输入能的53.26%和55.02%,其次为浮游生物生产,两组分别为45.92%和44.22%;浮游生物呼吸是能量输出的主要途径,分别占对照组和实验组总输出能的60.01%和56.68%,其次为养殖生物收获,两组分别为28.78%和31.99%;生态基实验组生物净产出能、光合能转化效率、饲料能转化效率及总能量转化效率均显著高于对照组(P0.05),而单位净产量耗饲料能和单位净产量耗总能则显著低于对照组(P0.05)。结果表明,在大口黑鲈池塘放置生态基能改善池塘环境,有效提高系统产出量及能量利用效率。 相似文献
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在3个3.2亩池塘中放养黄尾鲴夏花(1万尾/亩),观察高效抑菌有益微生物对黄尾鲴养成冬片的存活率、饵料系数及发病的影响，通过235天的池塘养殖实验，与对照组(未添加组)相比，添加高效抑菌有益微生物后黄尾鲴冬片存活率由65.58%提高到85.65%和84.64%(P<0.05),饵料系数由2.88降低到2.25和2.30(P<0.05);且发病次数和严重程度都优于对照组，产生的生产效益也高于对照组。表明基于添加高效抑菌有益微生物方式养殖黄尾鲴冬片能够有效降低饵料系数和养殖成本，提高养殖成活率和养殖效益。 相似文献
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选用体重约60 g的奥尼罗非鱼560尾,随机分成4个试验组,每组7个重复,每重复20尾,分别添加不同梯度水平的液体酶制剂(0、0.01%、0.02%、0.04%)。试验结果表明:奥尼罗非鱼饵料中添加非淀粉多糖酶对罗非鱼的特定生长率、饵料系数等均有显著影响(P<0.05),0.02%组和0.04%组的特定生长率比对照组分别提高10.61%和11.36%,0.02%组和0.04%组的饵料系数比对照组分别降低16.13%和18.99%;罗非鱼饵料中添加非淀粉多糖酶显著降低了水中氨氮含量,提高了水中溶氧量。 相似文献
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试验选用体重相近的健康鳙鱼6万尾,分为2个处理组,研究蝇蛆抗菌肽对鳙鱼生长性能及其成活率的影响。对照组的基础日粮中为普通粉料,试验组的基础日粮中添加100mg/kg的抗菌肽。试验期为56d。结果显示:试验期内实验组和对照组饵料系数分别为1.26和1.51,相比对照组,试验组成活率提高了10%,生长速度提高了26%以上,相对增重率分别为(159.86±8.34)%和(185.09±9.71)%,病害发生率降低了30%,饵料系数降低了16.56%。结果表明:蝇蛆抗菌肽可显著提高鳙鱼的生长性能,降低养殖成本,不失为优质的蛋白添加剂。 相似文献
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EM在水泥池封闭、半封闭式生态养虾中的应用 总被引：5，自引：0，他引：5
本实验以EM作为饲料添加剂和水质净化剂,采用全封闭、半封闭与传统养殖方式—对照组在实验室水泥池(118d)养殖实验。结果表明:EM能改良水质条件,促进对虾生长。全封闭和半封闭实验组成活率分别比对照组提高了48 7%,24 1%;饵料系数则降低了21 2%,14 1%;全封闭和半封闭实验组DO含量与对照组相比分别提高了9 4%,12 6%;COD含量与对照组相比分别降低了0 25%,0 48%;NH 2-N含量与对照4-N含量与对照组相比分别降低了19 2%,19 2%;NO 组相比分别降低了15 2%,21 1%。 相似文献
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生物絮团对锦鲤生长及养殖水体水质的影响 总被引：1，自引：0，他引：1
为了研究生物絮团对观赏鱼类生长影响及对养殖水质净化效果,通过设置对照组和生物絮团组(碳氮比为20:1)进行了锦鲤养殖效果对比试验。30d的试验结果显示,生物絮团组锦鲤的特定生长率相比对照组显著提高(P0.05),饲料系数相比对照组显著降低(P0.05),成活率两者之间无显著差异(P0.05)。在池塘水质净化方面,生物絮团组的亚硝酸盐氮浓度和氨氮含量变化趋势一致,呈现先升高后逐渐下降的趋势,生物絮团系统达到稳定后,生物絮团组的二态氮含量显著低于对照组(P0.05)。研究表明,生物絮团技术应用在锦鲤养殖中能有效净化池塘水质,同时可促进锦鲤生长。生物絮团通过实现饲料中蛋白质的二次有效利用,提高了饲料利用效率,降低了养殖成本、减少了水体污染。 相似文献
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Edwin H. Robinson Menghe H. Li Bruce B. Manning Charles C. Mischke Brian G. Bosworth 《Journal of the World Aquaculture Society》2004,35(4):468-477
A 2 ± 4 factorial experiment was conducted to examine effects of dietary protein level (28, 32, 36, and 40%) and feeding rate (satiation or ± 90 kg/ha per d) on production characteristics, processing yield, body composition, and water quality for pond-raised channel catfish Ictalurus punctatus. Fingerling channel catfish with a mean weight of 64 g/fish were stocked into 40 0.04-ha ponds at a rate of 17,290 fish/ha. Fish were fed once daily to apparent satiation or at a rate of ± 90 kg/ha per d for 134 d during the growing season. Dietary protein concentration had no effect on feed consumption, weight gain, feed conversion, survival, aeration time, or on fillet moisture, protein, and fat levels. Fish fed to satiation consumed more feed, gained more weight, had a higher feed conversion, and required more aeration time than fish fed a restricted ration. Visceral fat decreased, and fillet yield increased as dietary protein concentration increased to 36%. Carcass yield was lower for fish fed a diet containing 28% protein. Increasing feeding rate increased visceral fat but had no major effect on carcass, fillet, and nugget yields. Fish fed to satiation contained less moisture and more fat in the fillets that those fed a restricted ration. Nitrogenous waste compounds were generally higher where the fish were fed the higher protein diets. Although there was a significant interaction in pond water chemical oxygen demand between dietary protein and feeding rate, generally ponds in the satiation feeding group had higher chemical oxygen demand than ponds in the restricted feeding group. There was a trend that pond water total phosphorus levels were slightly elevated in the satiation feeding group compared to the restricted feeding group. However, pond water soluble reactive phosphorus and chlorophyll-a were not affected by either diet or feeding rate. Results from the present study indicate that a 28% protein diet provides the same level of channel catfish production as a 40% protein diet even when diet is restricted to 90 kg/ha per d. Although there was an increase in nitrogenous wastes in ponds where fish were fed high protein diets, there was little effect on fish production. The long term effects of using high protein diets on water quality are still unclear. Feeding to less than satiety may be beneficial in improving feed efficiency and water quality. 相似文献
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本文报道了对虾湿性颗粒饵料的配方、生产工艺及养殖效果。湿性颗粒饵料在适口性、引诱性、摄食率、蛋白的消化吸收率等方面都比干性颗粒饵料有所提高。摄食率提高5～15%,对蛋白质的消化吸收率提高10%以上,亩产增加10～20kg,饵料系数平均为1.9,下降0.10～0.23。虾个体平均体长增加0.6～1.0cm,亩经济效益增加285～538元。最后对研究结果进行了分析讨论。 相似文献
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不同饲料配方中浒苔添加量对大菱鲆生长的影响 总被引：1，自引：0，他引：1
以体质量(150.1±21.7)g的大菱鲆为试验对象,在半径100cm、高110cm的圆柱形流水鱼池中,深井海水与自然海水混合养殖条件下,采用摄食率法,研究在几种蛋白、脂肪等主要营养成分含量不同的饲料中添加不同量(0%、5%、10%、15%)的浒苔对大菱鲆生长性能的影响。试验结果表明,在试验设计范围内,经35d,蛋白质和灰分含量较高的市售饲料B组和A组饲喂效果显著优于蛋白质和灰分含量较低的自配饲料组(P0.05);在3种基础饲料中添加5%的浒苔粉显著提高了大菱鲆的摄食率(P0.05),提高了自配饲料组的质量增加率,降低了市售饲料A组和B组的饲料系数,3组大菱鲆的特定生长率均有提高,即大菱鲆饲料中浒苔添加量5%时饲喂效果较好。 相似文献
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耕水机在罗非鱼精养池塘的应用效果分析 总被引：1，自引：0，他引：1
选择两组罗非鱼(Tilapia)精养池塘作为研究对象,通过设置实验塘和对照塘的方法,研究耕水机的使用对精养池塘水质变化情况和养殖效果的影响.结果表明:与对照池塘相比,实验池塘的水质稳定,池水化学耗氧量的平均值降低了1.56 mg/L,总悬浮物的平均含量下降了24.3028 mg/L,总氨氮的平均浓度下降了0.2418 ... 相似文献
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为探索池塘循环水条件下不同养殖密度对翘嘴鳜(Siniperca chuatsi)生长的影响,按占池塘面积6%的比例建设养殖单元,剩余94%水体作为尾水净化单元,构建了翘嘴鳜和水生植物(藕、菱)的复合养殖系统。2018年6月,试验设置了20、30、40尾/m2三个养殖密度梯度,每个放养密度组重复3次,对不同养殖密度翘嘴鳜的生长速度、饵料系数、肌肉中营养物质含量进行了测定。结果显示:随着养殖密度的增加,翘嘴鳜平均日增重由4.86 g降至4.19 g,成活率由92.88%降至86.49%,饵料系数由3.77增至4.34。肌肉干物质中共检测出17种氨基酸,总氨基酸(TAA)含量是76.06~80.89 g/100 g、必需氨基酸(EAA)含量是30.39~31.28 g/100 g。肌肉中营养物质包括TAA、EAA、非必需氨基酸(NEAA)含量等均没有随着养殖密度的变化而发生规律性变化。结果表明,池塘循环水条件下适宜养殖密度为30尾/m2。 相似文献
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Sudhansu Shekhar Mahanand Sanjib Moulick P. Srinivasa Rao 《Aquaculture International》2013,21(2):347-360
The present study was conducted to design an optimum feed mix for the growth of rohu (Labeo rohita) in light-limited indoor culture with biofloc as a component along with fish feed. Eighteen 700-L tanks were utilized for producing biofloc using aquaculture effluent from a nearby carp culture pond. Fifteen different feed mixes were prepared using fish feed and biofloc in dry (4 % moisture content) and wet (90 % moisture content) forms at different proportions and used in feeding trials (three replications) conducted in forty-five 50-L glass aquarium stocked with three rohu fingerlings with average individual weight of 20 ± 1.5 g for a period of 90 days. Fish survival was 100 % in all the treatments. Mixture design was used to obtain a solution of best combination of feed source to obtain the optimum growth parameters of rohu. Optimum growth parameters (net yield, specific growth rate, protein efficiency ratio and feed conversion ratio) of rohu were obtained at feed mix containing 50 % fish feed and 50 % wet floc. The nutritional quality of biofloc was found to be quite suitable for rohu. The images of 3-week-old biofloc captured in scanning electron microscope (SEM) indicated the presence of different types of bacteria, algae, protozoa, rotifers, etc. in different sizes ranging from 10 to 100 μm. 相似文献
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Hussien A. Hebicha Gamal O. El Naggar Ahmed M. Nasr-Allah 《Journal Of Applied Aquaculture》2013,25(3):227-238
Econometric techniques were used to estimate a production function for tilapia pond culture in El-Fayum Governorate, Egypt, utilizing cross-sectional field data. Explanatory variables were feed, initial stocking weight, and pond size. The function was used to examine returns to scale, estimate the productivity of feed and initial stocking weight, and estimate the profit maximizing demand equations for feed and fingerlings. Diminishing returns to scale seem to exist for tilapia pond culture. Optimal economic stocking and feeding rates, yield, and profits for the whole sample were estimated at prevailing prices. Results indicated that producers were using stocking rates greater than the optimal by 36% to 115% and using insufficient feed by 8% to 22%. Investigation of the effects of changes in tilapia selling price and feed price on optimal stocking and feeding rates, yield, and profits showed that a change in tilapia selling price has greater effect on profits, yield, stocking, and feeding rates than a proportional change in feed price. Profits, feeding, and stocking rates are more sensitive than yield to changes in selling price, while feeding rate is more sensitive than stocking rate, yield, and profits to changes in feed price. 相似文献