Apparent digestibility of dry matter (DM), crude protein (CP), ether extract (EE), amino acid (AA), total phosphorus (TP) and gross energy (GE) of blood meal, silkworm pupa meal, expanded feather meal, hydrolyzed feather meal, protein peptide and corn gluten meal were determined for Jian carp (Cyprinus carpio var. Jian) in this experiment. The trial diets were consisted in 70% basal diet and 30% test ingredient containing 0.5% chromic oxide as an inter marker. Two hundred and ten fish with the average body weight of (220.53±4.67) g were randomly divided into 7 groups with 3 replicates per group and 10 fish per replicate. Fish in each replicate were reared in an indoor aquarium (3.0 m×0.8 m×0.8 m). After 1 week feeding with trial diets, the fecal samples were collected by siphon, then the apparent digestibility of nutrients were determined. The results showed that the apparent digestibility of DM, CP, AA, EE, TP and GE for Jian carp were ranged from 63.11% to 94.57%, 66.51% to 92.85%, 69.73% to 93.20%, 66.48% to 88.32%, 29.04% to 98.92% and 58.67% to 91.92%, respectively. The apparent digestibility of nutrients in corn gluten meal were the highest, which is significantly higher than those in other test ingredients (P<0.05). The apparent digestibility of CP in expanded feather meal was the lowest (66.51%) and the ones in other ingredients were more than 75%. The apparent digestibility of TP in protein peptide was 54.13% and the ones in blood meal, silkworm pupa meal and expanded feather meal were all above 40%, while the one in hydrolyzed feather meal was the lowest (29.04%). In conclusion, corn gluten meal is a high quality protein source for Jian carp, and it can be used to instead of part of fish meal in actual feed production. While, because of the different produce processes of feather meal, the nutrient composition is different among the products, and that lead to the different apparent digestibility. So, the nutrient composition of these feed ingredients should be evaluated before formulating diets. ［Chinese Journal of Animal Nutrition, 2011, 23（6）：1065 -1072］
LIANG Danni,JIANG Xuejiao,LIU Wenbin,LU Kangle,QIAO Qiushi
. Apparent Digestibility of Nutrients in Six Kinds of Non-conventional Protein Ingredients for Jian Carp[J]. Chinese Journal of Animal Nutrition, 2011
, 23(06)
: 1065
-1072
.
DOI: 10.3969/j.issn.1006-267x.2011.06.026
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