title: Pig performance increases with the addition of DL-methionine and L-lysine to ensiled cassava leaf protein diets.
abstract: Two studies were conducted to determine the impact of supplementation of diets containing ensiled cassava leaves as the main protein source with synthetic amino acids, DL-methionine alone or with L-lysine. In study 1, a total of 40 pigs in five units, all cross-breds between Large White and Mong Cai, with an average initial body weight of 20.5 kg were randomly assigned to four treatments consisting of a basal diet containing 45% of dry matter (DM) from ensiled cassava leaves (ECL) and ensiled cassava root supplemented with 0%, 0.05%, 0.1% and 0.15% DL-methionine (as DM). Results showed a significantly improved performance and protein gain by extra methionine. This reduced the feed cost by 2.6%, 7.2% and 7.5%, respectively. In study 2, there were three units and in each unit eight cross-bred (Large White × Mong Cai) pigs with an initial body weight of 20.1 kg were randomly assigned to the four treatments. The four diets were as follows: a basal diet containing 15% ECL (as DM) supplemented with different amounts of amino acids L-lysine and DL-methionine to the control diet. The results showed that diets with 15% of DM as ECL with supplementation of 0.2% lysine +0.1% DL-methionine and 0.1% lysine +0.05% DL-methionine at the 20-50 kg and above 50 kg, respectively, resulted in the best performance, protein gain and lowest costs for cross-bred (Large White × Mong Cai) pigs. Ensiled cassava leaves can be used as a protein supplement for feeding pigs provided the diets contain additional amounts of synthetic lysine and methionine.
authors.affiliation: Department of Animal Nutrition and Biochemistry, Hue University of Agriculture and Forestry, Hue City, Vietnam. nguyenhoaly@gmail.com
authors.forename: Nguyen Thi Hoa
authors.initials: NT
authors.lastname: Ly
authors.forename: Le Duc
authors.initials: le D
authors.lastname: Ngoan
authors.forename: Martin Wilhelmus Antonius
authors.initials: MW
authors.lastname: Verstegen
authors.forename: Wouter Hendrikus
authors.initials: WH
authors.lastname: Hendriks
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis*; D005260:Female; D008239:Lysine / Q000008:administration & dosage* / Q000378:metabolism; D008297:Male; D002365:Manihot / Q000737:chemistry*; D008715:Methionine / Q000008:administration & dosage* / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D011897:Random Allocation; D012820:Silage / Q000032:analysis; D034421:Sus scrofa / Q000254:growth & development* / Q000378:metabolism; D014744:Vietnam; D015430:Weight Gain
chemical_list: D008715:Methionine; D008239:Lysine