| 泼洒糖蜜对池塘养殖罗氏沼虾生长和水质的影响 |
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| 引用本文： | 朱锦裕,卜弘毅,胡冲冲,苗淑彦.泼洒糖蜜对池塘养殖罗氏沼虾生长和水质的影响[J].水产科学,2017(2):202-206. |
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| 作者姓名： | 朱锦裕 卜弘毅 胡冲冲 苗淑彦 |
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| 作者单位： | 扬州大学 动物科学与技术学院,江苏 扬州,225009 |
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| 基金项目： | 江苏省水产三新工程(Y2014-34)，扬州大学2015大学生科技创新基金项目(x2015683) |
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| 摘 要： | 将单口面积1.33~2.33hm~2、环境相似的6口罗氏沼虾养殖池塘分为2组,3口池塘投喂蛋白质水平为35.4%的饲料,且每日适量泼洒糖蜜(试验组),3口池塘投喂蛋白质水平为41.9%的饲料,不泼洒糖蜜(对照组),常规管理。养殖期间,每隔15d取水样检测氨氮和亚硝态氮含量。156d的饲养结果表明,对照组和试验组罗氏沼虾的产量分别为6600kg/hm~2和6427.5kg/hm~2,降低饲料中的蛋白水平结合泼洒糖蜜不影响罗氏沼虾的生长(P0.05),养殖效益亦无显著差异(P0.05)。但试验组池塘水中氨氮较对照组低54.0%,亚硝态氮低21.0%,泼洒糖蜜显著降低了池塘氨氮和亚硝态氮含量(P0.05)。
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| 关 键 词： | 罗氏沼虾 池塘养殖 生物絮团 水质 养殖效益 |
Effects of Molasses Supplementation on Growth and Water Qualityin Giant Freshwater Prawn Macrobrachium rosenbergii Ponds |
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| ZHU Jinyu,BU Hongyi,HU Chongchong,MIAO Shuyan.Effects of Molasses Supplementation on Growth and Water Qualityin Giant Freshwater Prawn Macrobrachium rosenbergii Ponds[J].Fisheries Science,2017(2):202-206. |
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| Authors: | ZHU Jinyu BU Hongyi HU Chongchong MIAO Shuyan |
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| Abstract: | A 156-day feeding trial was conducted in 6 outdoor ponds with surface area of 1.3-2.3 hm2 in Gaoyou, Jiangsu province, China to investigate effects of bioflocs technology (BFT) on water quality and growth performance of giant freshwater prawn Macrobrachium rosenbergii.Juvenile giant freshwater prawn were fed diet containing 35% protein in 3 test ponds with addition of molasses as biofloc with the C/N ratio of 20 based on the amount of daily diet and fed diet containing 42% protein in 3 control ponds without addition of molasses.During the experiment, contents of ammonia nitrogen and nitrite-N in water were monitored in a 15 day interval.The results showed that there were significantly lower levels of ammonia-N (reduced by 54.0%) and nitrite-N (reduced by 21.0%) in the test ponds than those in the control ponds (P<0.05).The prawn yield was found to be 6600 kg/hm2 in the test ponds and 6427.5 kg/hm2 in the control ponds, indicating that even though decline in dietary protein level, molasses addition did not significantly affect the growth of the prawn (P>0.05).Meanwhile, no difference in economic benefits was observed in both groups (P>0.05).However, feed cost was significantly decreased by reducing the protein level in the test group (P<0.05), due to reduce in the use of protein sources.The findings provided theoretical basis and research foundation in applying biofloc technology in healthy and sustainable development of prawn culture. |
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| Keywords: | Macrobrachium rosenbergii pond culture biofloc technology water quality economic benefit |
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