Premium
Evaluation of dietary methionine requirement of male Korean native ducks for 3 weeks post‐hatching
Author(s) -
Yoo Jaehong,
Yi YoungJoo,
Wickramasuriya Samiru S.,
Kim Eunjoo,
Shin Taeg Kyun,
Kim Nu Ri,
Heo Jung Min
Publication year - 2017
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12833
Subject(s) - methionine , hatching , zoology , body weight , feed conversion ratio , biology , completely randomized design , endocrinology , biochemistry , amino acid
A total of 336 1‐day‐old male Korean native ducks (KND) were used in a completely randomized design with seven dietary methionine levels (0.30–0.90% with 0.1% increment) to determine the methionine requirement of male Korean native ducks for 3 weeks after hatching. Each dietary treatment had six replicates with eight ducklings per pen. One duckling from each pen ( n = 6) was sacrificed to weigh empty body and drumsticks at the end of the experiment. Final body weight and weight gain of 3 weeks old KND were increased with increasing dietary methionine levels up to 0.4%, and then decreased ( P < 0.05) with a further increasing dietary methionine level. In contrast, feed conversion ratio of the KND decreased up to 0.4% and increased ( P < 0.05) with the increasing dietary methionine level. Both empty body weight and proportions of empty body weight were linearly increased ( P < 0.05) while the dietary methionine level elevated up to 0.4%. Estimated dietary methionine requirement for maximum body weights, daily gain and minimum feed conversion ratio were 0.36, 0.39 and 0.40%, respectively, when it was fitted into linear‐ and quadratic‐plateau models.