Open AccessComparative standardized ileal amino acid digestibility and metabolizable energy contents of main feed ingredients for growing pigs when adding dietary β-mannanase
Author(s) -
Se Min Jeon,
Abdolreza Hosseindoust,
Yo Han Choi,
Min Ju Kim,
Kwang Yeol Kim,
Jun Hyung Lee,
Dong Yong Kil,
Beob Gyun Kim,
B. J. Chae
Publication year - 2019
Publication title -
animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.356
H-Index - 28
eISSN - 2405-6545
pISSN - 2405-6383
DOI - 10.1016/j.aninu.2019.07.001
Subject(s) - latin square , nutrient , zoology , meal , soybean meal , chemistry , feed conversion ratio , food science , dry matter , digestion (alchemy) , biology , body weight , rumen , chromatography , fermentation , endocrinology , raw material , organic chemistry
The present study was conducted to test whether the dietary supplementation of β-mannanase affects amino acids (AA) digestibility, metabolizable energy (ME) contents of corn, wheat, soybean meal, distillers dried grains with solubles, and palm kernel meal (PKM), nutrient digestibility, and growth performance of pigs. In Exp. 1, 22 cannulated pigs were used for 10 dietary treatments including 5 feed ingredients and 2 β-mannanase concentrations (0 and 0.5 g/kg of the diet) in 6 periods in an incomplete Latin square design to determine the AA and energy digestibility. In Exp. 2, 200 growing pigs were randomly allotted to 4 treatments with 2 nutrient levels (high and low) and 2 concentrations of β-mannanase (2 × 2 factorial arrangement) in 2 phases (phase 1, d 0 to 21; and phase 2, d 22 to 42). In Exp. 1, β-mannanase increased the mean standardized ileal digestibility (SID) of AA in all feed ingredients. The amount of digestible energy was increased ( P < 0.05) in β-mannanase-treated PKM. Pigs fed β-mannanase showed a greater ( P < 0.05) digestibility of gross energy (GE). The feed-to-gain (F:G) ratio was improved ( P < 0.01) in pigs fed high-nutrient diets. Pigs fed β-mannanase in the diets had greater ( P < 0.05) average daily gain and F:G. In phase 2, the concentration of fecal ammonia was decreased ( P < 0.05) in pigs fed β-mannanase. Considering the 2 experiments, it can be concluded that β-mannanase increases the SID of AA, which has to be considered in balancing the rations.