Nutritional value of domesticated duckweed variety DW2602 and its feeding effects on the growth performance and digestive activities of tilapia fingerlings  

作　　者：Bingying Han Ting Chen Bohan Yu Yuepan Ren Yuhan Long Deguan Tan Lili Fu Jiaming Zhang 

机构地区：[1]Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China [2]Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province,Hainan Institute for Tropical Agricultural Resources,Haikou 571101,China [3]College of Life Sciences,Nanjing Agricultural University,Nanjing 210059,China [4]College of Fishery,Huazhong Agricultural University,Wuhan 430070,China

出　　处：《Tropical Plants》2022年第1期87-95,共9页热带植物（英文刊）

基　　金：funded by Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences under grant number 1630052020022;the International Science and Technology Cooperation Program of China under Grant number 2010DFA62040.

摘　　要：Duckweed are a family of fast-growing aquatic plants,in which wild plants of many species have been tested in animal feed.We domesticated a duckweed variety,Spirodela polyrhiza DW2602,which had 44.5%protein and 2.6% lysine and was grown on a large scale.The effects of DW2602 on the growth performance and the digestive enzyme activities of tilapia variety GIFT(Genetic Improvement of Farmed Tilapia,Oreochromis niloticus)fingerlings were evaluated.The dry powder of DW2602 was added to conventional tilapia feed at six inclusion levels of 0%,10%,15%,20%,25%,and 30%.The diets were fed to tilapia fingerlings with an initial weight of 2.0±0.15 g for 60 d.Results showed that DW2602 improved the growth performance and digestive enzyme activities significantly.The feeding effect was the best when the inclusion rate was 20%,in which the body weight increased to 37.24±1.21 g in 60 d,18.15%higher than the control(P<0.05).The weight gain rate,the specific growth rate,the condition factor,and the hepatosomatic index of the fish were all significantly higher than the control(P<0.05),and the amylase,protease,and lipase activities in the digestive system were all promoted by DW2602(P<0.05).Therefore,the duckweed variety DW2602 has great application prospect in tilapia culture.

关 键 词：DUCK WEED domestica 

分 类 号：Q94[生物学—植物学]