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暗纹东方鲀、南美白对虾和空心菜
立体种养模式初探 总被引：1，自引：0，他引：1
为探索高效的生态养殖模式,研究比较了暗纹东方鲀、南美白对虾和空心菜立体种养(模式1)、暗纹东方鲀单养(模式2)、南美白对虾单养(模式3) 3种养殖模式的养殖产量、饲料系数和综合养殖效果。养殖试验结果:模式1～3的单位面积产量分别为358、310、338 kg/亩(15亩=1 hm~2,下同),产值分别为19 591、18 308、14 828元/亩,利润分别为8 807、6 722、8 337元/亩;模式1、模式2中暗纹东方鲀的成活率分别为93.3%、94.3%,饲料系数分别为2.74、2.59;模式1、模式3南美白对虾的成活率分别为51.6%、70.9%,饲料系数分别为0.95、1.55。结果表明,暗纹东方鲀、南美白对虾和空心菜立体种养模式既能提高池塘利用率,获得较好的养殖经济效益,同时还改善了池塘水质,是1种值得推广的健康养殖模式。 相似文献
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<正> 我场于2001年6月5日至10月5日进行了南美白对虾淡水池塘养殖试验,养殖面积6.4hm~2,总产虾17184kg,平均单产179kg/667m~2,获总纯效益32.54万元,平均效益3389.6元/667m~2,现将试验情况总结如下:1 试验条件1.1 试验池塘10口,面积6.4hm~2(96亩),其中0.53hm~2的池塘6口,0.8hm~2的池塘4口。 相似文献
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近日,由河口区海洋与渔业局承担的《半咸水南美白对虾养殖池塘高效综合利用———网箱漠斑牙鲆养殖技术试验》科研项目,通过专家鉴定,该项目综合研究达到国内领先水平。项目实施两年,共开发推广南美白对虾与漠斑牙鲆套养面积250亩,漠斑牙鲆养殖网箱(3m×3m)100个,鱼虾总产84.3t,漠斑牙鲆网箱平均单产11.2kg/m2,实现产值379.6万元,效益215.7万元,辐射带动养殖面积1 000亩,实现产值1 500万元,经济和社会效益显著。项目根据黄河三角洲地区荒碱地资源优势和养殖现状,首次在国内利用半咸水南美白对虾养殖池塘进行网箱漠斑牙鲆养殖,取得成功,并总… 相似文献
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2017、2018年连续2年利用7口0.4 hm~2(6亩)对虾养殖池在淡水条件下进行了鲻鱼与南美白对虾混养试验。试验结果:鲻鱼放养规格48～80 g/尾,放养密度为75～225尾/hm~2,收获鲻鱼规格为420～520 g/尾。2017年,南美白对虾单养池(对照池)产量为6 090 kg/hm~2,6口鱼虾混养池产量分别比对虾单养池高540～1 590 kg/hm~2,平均单产提高1 012.5 kg/hm~2;2018年对虾单养池产量5 790 kg/hm~2,6口混养池南美白对虾产量分别比对虾单养池高795～1 515 kg/hm~2,平均单产提高1 170 kg/hm~2。2017年6口鱼虾混养池养殖收益分别比对虾单养池高50 100～64 500元/hm~2,平均收益提高65 145元/hm~2;2018年6口鱼虾混养池的养殖收益分别比对虾单养池高28 500～55 950元/hm~2,平均收益提高40 365元/hm~2。池塘水质方面,养殖中后期,鱼虾混养池的氨氮、亚硝酸氮等水质指标明显低于对虾单养池。试验结果表明,选择合适的鱼类品种混养在对虾池中,对于改善池塘水质,增加养殖收益具有显著效果。 相似文献
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<正>1龄鱼种池套养克氏原螯虾是利用上半年饲养鱼种的空闲塘口和时间,于3月底至4月初投放克氏原螯虾幼虾,或是采取本塘上一年的自繁存塘幼虾,通过载种水草、放养螺蛳、强化投饵、调节水质、精精心管理等一系列措施,饲养出1—2季成虾的养殖模式。2008—2009年在260×667 m~2不同面积的12口池塘养殖试验,平均产成虾121 kg/667 m~2,1龄鱼种产量426 kg/667 m~2。产值8 920元/667 m~2,其中养虾产值3 410元,养鱼产值5 510元。利润 相似文献
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面积均为4450m2的6口池塘分为2组,其中试验组3口以3万尾/667m2的低密度养殖南美白对虾,并在池中设置5%面积的网箱套养黄鳝,对照组以5万尾/667m2的密度专养南美白对虾,分别获得5200元/667m2和3100元/667m2的利润. 相似文献
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通过引进南美白对虾优良品种,在淡水池塘养殖成功的基础上,进一步探索解决和完善南美白对虾的规模化健康养殖技术。在不同水域条件下,采用不同放养密度,进行对比养殖试验,取得最佳放养模式。利用大池套小池技术,解决淡水盐化虾苗先期培育,提高虾苗成活率,减少养虾池投入,节约成本10%。结果:试验推广面积341.9 hm2,总产虾1115.34 t,平均3262.5 kg/hm2;总产值3 346.02万元,单位产值97875元/hm2;总效益1758.9万元,单位效益51450元/hm2;投入产出比1∶2.1。平均规格15 g/尾,虾苗成活率63.98%。 相似文献
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为抵御单一养殖崇明清水蟹带来的风险,开展了崇明清水蟹与澳洲红螯螯虾高效生态混养试验。以2020年上海崇东水产养殖专业合作社的混养试验为例,养殖池塘面积1 hm~2,蟹种放养量12 000只,产量1 125 kg,澳洲红螯螯虾放养量15 000尾,产量450 kg,总产值31.5万元,利润20.1万元。结果表明,采用崇明清水蟹与澳洲红螯螯虾高效生态混养模式,不会影响清水蟹的产量,且单位面积利润比单养模式提高了34%,因此是1种生态效益和经济效益兼顾的养殖模式。 相似文献
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为调整上海郊区的水产养殖结构,开发水产新品种,提升养殖效益,2021年在上海市郊某合作社开展了墨瑞鳕(Maccullochella peelii)大棚水泥池养殖试验。试验采用2口大棚水泥池,投放经标粗培育的平均体质量为150 g/尾的墨瑞鳕大规格鱼种,放养密度为25尾/m2,全程投喂粗蛋白质质量分数43%的海水鱼膨化饲料。经过13个月养殖,共收获墨瑞鳕商品鱼9 576 kg(单位产量13.3 kg/m3,平均规格696.2 g/尾),饲料系数为1.58,单位产值为1 030元/m3。墨瑞鳕大棚水泥池养殖试验成功,对水产养殖结构调优具有一定的借鉴作用。 相似文献
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为探索可口革囊星虫高效养殖模式,提高养殖效益,于2015—2016年在浙江省温岭市七一塘开展了可口革囊星虫分级养殖试验。试验苗种为潮间带采集的自然苗。试验池塘面积共4.67 hm2,其中1.47 hm2用于可口革囊星虫苗种的标粗及养成,3.20 hm2用于分养经过中间培育的苗种。于2015年7月中旬按每公顷1425 kg(约892.5万条)的密度放养规格为6260条/kg的苗种,经6个月的中间培育后,起捕规格773条/kg的中苗10400 kg,分养至总面积为3.20 hm2的4口池塘,用于标粗的2口池塘(1.47 hm2)内留存一部分苗种,经整理后继续养成。2017年1月中旬至2月下旬起捕上市,共收获可口革囊星虫61970 kg,产值322.54万元,净利润185.54万元。经折算,平均产量达13270 kg/hm2,平均产值为69.07万元/hm2,平均利润为39.73万元/hm2。 相似文献
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为提高刀鲚和暗纹东方鲀的池塘养殖效益以及获得大规格刀鲚鱼种,2021年在上海市水产研究所奉贤科研基地的4口池塘中进行了1+龄刀鲚(3 000尾/hm2)与暗纹东方鲀成鱼(12 000尾/hm2)的混养试验以及刀鲚生态自繁养殖试验。经过132 d的养殖,刀鲚出塘规格达到24.99～59.90 g/尾,成活率为15.0%～54.1%,其中有3口试验池塘获得了大规格刀鲚自繁鱼种,数量分别为2 515、2 871、3 399尾；暗纹东方鲀出塘规格在280.2～296.3 g/尾,单位面积产量达到3 372.8～3 502.5 kg/hm2,成活率达97.8%～100.0%。 相似文献
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本文较详细地介绍了利用海水与海水晶进行20亩池塘的淡化养殖南美白对虾的效果对比试验情况。使用海水淡化养殖的池塘，虾苗淡化成活率90.3%，平均亩产364．7kg，养殖成活率90．2％，亩毛利润为5616．2元；使用海水晶淡化养殖的池塘，虾苗淡化成活率87．6％，平均亩产353．4kg，养殖成活率88.7％，亩毛利润为5441．6元。试验结果表明，两者在养殖成活率、生长速度、亩产量、饲料系数等方面均表现出无明显的差别。本文还介绍了淡化养殖南美白对虾操作技术，对养殖生产者具有一定的参考价值。 相似文献
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Stocking strategies for production of Litopenaeus vannamei (Boone) in amended freshwater in inland ponds 总被引：1，自引：1，他引：0
Bartholomew W Green 《Aquaculture Research》2008,39(1):10-17
The performance of the Pacific white shrimp Litopenaeus vannamei (Boone) under various stocking strategies was evaluated in earthen ponds filled with freshwater amended with major ions. Six 0.1‐ha earthen ponds located in Pine Bluff, AR, USA, were filled with freshwater in 2003 and 2004, and potassium magnesium sulphate added to provide 50 mg K+ L?1 and stock salt added to provide 0.5 g L?1 salinity. In 2003, three ponds either were stocked with PL15 shrimp (39 PL m?2) for 125 days of grow out or with PL25 shrimp for 55 days (23 PL m?2) followed by a 65‐day (28 PL m?2) grow‐out period. In 2004, ponds were stocked with 7, 13 or 30 PL15 m?2 for 134 days of grow out. Salinity averaged 0.7 g L?1 during both years, and concentration of SO4?2, K+, Ca2+ and Mg2+ was higher, and Na+ and Cl? was lower in amended pond water than in seawater at 0.7 g L?1 salinity. Potassium concentration in amended water was 52–61% of the target concentration. Shrimp yields ranged from 3449 kg ha?1 in 2003 to 4966 kg ha?1 in 2004 in ponds stocked with 30–39 PL15 m?2 for a 125–134‐day culture period. At harvest, mean individual weight ranged from 17.1 to 19.3 g shrimp?1. In ponds stocked with PL25 shrimp, yields averaged 988 and 2462 kg ha?1 for the 1st and 2nd grow‐out periods respectively. Gross shrimp yield in 2004 increased linearly from 1379–4966 kg ha?1 with increased stocking rate. These experiments demonstrated that L. vannamei can be grown successfully in freshwater supplemented with major ions to a final salinity of 0.7 g L?1. 相似文献
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Lin Zhu Xuan Che Huang Liu Xingguo Liu Chong Liu Xiaolong Chen Xu Shi 《Aquaculture International》2016,24(4):893-902
In this study, we assess the greenhouse gas emissions and greenhouse effect potential of a Wuchang bream (Megalobrama amblycephala) aquaculture. We used the ‘static opaque chamber-gas chromatography method’ to determine in situ emissions of greenhouse gases in the 3-month growing season (CO2, CH4, and N2O) from bream culturing ponds. We detected emissions of all three gases from the ponds, with CO2 emission far exceeding the other gases in the 3-month growing season (CO2 = 278.54 ± 36.41 g/m2, CH4 = 23.73 ± 5.27 g/m2, and N2O = 1.69 ± 0.32 g/m2). We calculated that in one growing season this ecosystem would have a total emission of CO2 equivalent of 15.86 t CO2/hm2, indicating its ability to contribute to global warming via the greenhouse effect. 相似文献
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Intensification of Shrimp Culture in Earthen Ponds in South Carolina: Progress and Prospects 总被引：1，自引：0，他引：1
Paul A. Sandier J. Stephen Hopiuns Alvin D. Stokes 《Journal of the World Aquaculture Society》1988,19(4):218-226
Experiments on the intensive cultivation of Pacific white shrimp, Penueus vunnumei, in ponds in South Carolina were begun in 1985 at the Waddell Mariculture Center. A preliminary study involved two 0.1 ha ponds stocked at an average of 43 postlarvae/m2, with management practices based on those used in Taiwan for intensive pond culture of Penueus monodon. Harvest yields averaged 6,757 kg/ha for one crop, demonstrating the technical feasibility of such intensive culture of P. vannumei. In 1986, 2.5 ha of ponds at the Waddell Center (six ponds totaling 2.0 ha at 40 postlarvae/m2 and two totaling 0.5 ha at 60/m2) yielded a total of 13,606 kg (5,442 ke/hn). These results were obtained even though aeration and water exchange rates were substanthlly reduced and South Carolina experienced its worst heat wave and drought. This served as a pilot-sde, proof-ofconcept test. Tank studies in 1985 and 1986 showed little effect of stocking density on shrimp growth rate at densities of 20–100 animals/m2. This was confirmed in ponds in 1987 when no differences in growth rates were observed at densities of 20–100 postlarvae/m2. Harvest biomass increased directly with stocking density in all trials, reaching a maximum of 12,680 kg/ha/crop at 100 shrimp/m2 in 1987. Initial attempts to intensify production in the nascent South Carolina shrimp farming industry occurred in 1986, when approximately 32 ha of private ponds were stocked at densities of 10–32 postlarvae/m2. Farm harvests increased with stocking density, with maximum yield of 3,656 kg/ ha/crop. This trend toward intensification in the private sector is continuing, and in 1987 maximum harvests from private ponds were 5,050 kg/ha from a 0.3 ha pond and 4,625 kg/ha from a 1.5 ha pond. Prospects for further implementation of intensive culture in the private sector appear excellent, with yields of ≥ 10,000 kg/ha/crop expected from private farms within the next few years. 相似文献