• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Effect of different biofloc system on water quality,udbiofloc composition and growth performance inudLitopenaeus vannamei (Boone, 1931)
【2h】

Effect of different biofloc system on water quality,udbiofloc composition and growth performance inudLitopenaeus vannamei (Boone, 1931)

机译：不同生物絮凝系统对水质的影响， ud生物絮团成分和生长性能Litopenaeus vannamei（Boone，1931）

页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The experiment was conducted with three bioflocudtreatments and one control in triplicate in 500 Ludcapacity indoor tanks. Biofloc tanks, filled withud350 L of water, were fed with sugarcane molassesud(BFTS), tapioca flour (BFTT), wheat flourud(BFTW) and clean water as control without bioflocudand allowed to stand for 30 days. The postlarvaeudof Litopenaeus vannamei (Boone, 1931) with anudAverage body weight of 0.15 � 0.02 g wereudstocked at the rate of 130 PL mud�2 and culturedudfor a period of 60 days fed with pelleted feed atudthe rate of 1.5% of biomass. The total suspendedudsolids (TSS) level was maintained at aroundud500 mg Lud�1 in BFT tanks. The addition of carbohydrateudsignificantly reduced the total ammonia-udN (TAN), nitrite-N and nitrate-N in water and itudsignificantly increased the total heterotrophic bacteriaud(THB) population in the biofloc treatments.udThere was a significant difference in the finaludaverage body weight (8.49 � 0.09 g) in theudwheat flour treatment (BFTW) than those treatmentudand control group of the shrimp. Survivaludof the shrimps was not affected by the treatmentsudand ranged between 82.02% and 90.3%. Theudproximate and chemical composition of bioflocudand proximate composition of the shrimp was significantlyuddifferent between the biofloc treatmentsudand control. Tintinids, ciliates, copepods, cyanobacteriaudand nematodes were identified in all theudbiofloc treatments, nematodes being the mostuddominant group of organisms in the biofloc. Itudcould be concluded that the use of wheat flour (BFTW) effectively enhanced the biofloc productionudand contributed towards better water qualityudwhich resulted in higher production of shrimp.
机译：在500 L udcapacity室内水箱中，一式三份地进行了三种生物絮凝处理和一个对照实验。在装有 ud350升水的生物絮凝池中，加入甘蔗糖蜜 ud（BFTS），木薯粉（BFTT），小麦粉 ud（BFTW）和纯净水作为对照，而无生物絮凝剂 ud，并静置30天。将平均体重为0.15 ⁄ 0.02 g的凡纳滨对虾Litopenaeus vannamei（Boone，1931）的幼体 ud d以130 PL m ud·2的速率放养，并在60 d的时间内培养 ud 生物量的1.5％。在BFT储罐中，总悬浮物/固形物（TSS）水平保持在 ud500 mg L ud.1附近。在生物絮凝剂处理中，添加碳水化合物显着降低了水中的总氨-udN（TAN），亚硝酸盐-N和硝酸盐-N，并且显着增加了总异养细菌 ud（THB）种群。小麦粉处理（BFTW）的最终平均体重（8.49×0.09 g）与虾的处理 udand对照组相比有显着差异。虾的存活率不受处理的影响，范围在82.02％至90.3％之间。虾的生物絮凝物的化学成分与化学成分之间的关​​系在化学絮凝物处理与对照之间是显着的/不同的。在所有 udbiofloc处理中均鉴定出了tintinids，纤毛虫，co足类动物，蓝细菌 ud和线虫，其中线虫是生物絮凝物中最主要的生物体。可以得出结论，使用小麦粉（BFTW）有效地提高了生物絮凝物的产量，并有助于改善水质，从而提高了虾的产量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号