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A New Culture Method of High Ecological Efficiency of Grass Carp (Ctenopharyngodon idellus)


Affiliations
1 Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
2 College of Life Science, South China Normal University, Guangzhou 510631, China
 

To explore new culture methods to save aquaculture water and reduce the emission of aquaculture wastewater in current culture of grass carp mainly feeding with compound feed now, in this study, grass carp were respectively fed with hybrid napier grass (grass group), compound feed (feed group), and a mixture of hybrid napier grass and compound feed (mixture group). Growth rate, aquaculture water quality, and sediment indexes in these three groups were analysed. The results revealed that mixture group had the highest growth rate and grass group had the lowest rate (P < 0.05). The lowest levels of water TN, NH4 +-N, TP, SP, CODcr, Cyanobacteria and sediment available N, P, K were observed in the grass group, and the highest were observed in the feed group (P < 0.05). Overall, the feeding approach of compound feed mixed with hybrid napier grass might be a better model for grass carp. In the future, if hybrid napier grass can be formed into a palatable diet combined with compound feed, it will perhaps reduce the accumulation of sediments brought by the hybrid napier grass, and further enhance the utilization efficiency of the hybrid napier grass in grass carp aquaculture.

Keywords

Grass Carp, Hybrid Napier Grass, Flesh Quality, Ecological Efficiency.
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  • A New Culture Method of High Ecological Efficiency of Grass Carp (Ctenopharyngodon idellus)

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Authors

Er-Meng Yu
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
Xiao-Yan Li
College of Life Science, South China Normal University, Guangzhou 510631, China
Jun Xie
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
Zhang-He Chen
College of Life Science, South China Normal University, Guangzhou 510631, China
Guang-Jun Wang
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
De-Guang Yu
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
Zhi-Fei Li
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
Yun Xia
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China
Kai Zhang
Key Laboratory of Tropical & Subtropical Fishery Resource Application and Cultivation, Ministry of Agriculture, Pearl River Fisheries Research Institute of CAFS, Guangzhou 510380, China

Abstract


To explore new culture methods to save aquaculture water and reduce the emission of aquaculture wastewater in current culture of grass carp mainly feeding with compound feed now, in this study, grass carp were respectively fed with hybrid napier grass (grass group), compound feed (feed group), and a mixture of hybrid napier grass and compound feed (mixture group). Growth rate, aquaculture water quality, and sediment indexes in these three groups were analysed. The results revealed that mixture group had the highest growth rate and grass group had the lowest rate (P < 0.05). The lowest levels of water TN, NH4 +-N, TP, SP, CODcr, Cyanobacteria and sediment available N, P, K were observed in the grass group, and the highest were observed in the feed group (P < 0.05). Overall, the feeding approach of compound feed mixed with hybrid napier grass might be a better model for grass carp. In the future, if hybrid napier grass can be formed into a palatable diet combined with compound feed, it will perhaps reduce the accumulation of sediments brought by the hybrid napier grass, and further enhance the utilization efficiency of the hybrid napier grass in grass carp aquaculture.

Keywords


Grass Carp, Hybrid Napier Grass, Flesh Quality, Ecological Efficiency.

References