TY - JOUR JO - Journal of Animal and Feed Sciences J2 - J. Anim. Feed Sci. SN - 1230-1388 VL - 17 IS - 2 PY - 2008 ID - Wang2008 TI - Effect of dietary soyabean hulls and metal-amino acid chelated mineral supplementation on growth performance, nutrient digestibility and noxious gas emission in growing pigs AB - A 2×2 factorial design Experiment 1 was conducted in order to characterize the effects of soyabean hulls (control or soyabean hulls diet) and metal-amino acid chelated minerals (MAC) (sulphate or MAC) on growth performance and nutrient digestibility in growing pigs. Forty eight pigs with the initial body weight (BW) 18.0±1.1 kg were assigned on the basis of weight and sex to one of four treatments (2 pigs/pen, 6 replication pens/treatment, 6 barrows and 6 gilts/treatment). Throughout the experimental period, growth performance was not shown to be affected by dietary treatments. The coefficients of the total tract apparent digestibility of dry matter (DM) and nitrogen (N) remained unaffected by soyabean hulls diets or MAC supplementation. In Experiment 2, four barrows were used in a 4×4 Latin square design, to determine the effects of soyabean hulls and mineral types on emission of faeces and slurry noxious gas, including ammonia (NH 3 ), hydrogen sulphide (H 2 S) and mercaptans (R.SH), in growing pigs. Faeces and urine grab samples were collected, and the faeces (300 g) and slurry (faeces + urine = 150 + 150 g) were mixed, stored, and fermented for 5 d in order to evaluate noxious gas emission. Pigs fed diets with soyabean hulls tended to have lower NH 3 emission from faeces (P=0.09) than those fed the control diet, but NH 3 emission from the slurry was not affected by soyabean hulls diet (P=0.12). No significant effects on the faeces or slurry NH 3 emission were exerted in MAC supplementation treatment. A significant level of interaction between soyabean hulls and MAC was observed both in the faeces and slurry NH 3 emission (P=0.05, P=0.01). Pigs fed diets with soyabean hulls tend to exhibit lower H 2 S emission from the slurry (P=0.07), but significantly lower levels of H 2 S emission both from faeces and slurry (P=0.004, P=0.02) was observed when pigs were fed on MAC diets. The emission of R.SH from faeces significantly decreased (P=0.02) in MAC supplementation treatments, but not from slurry, and no soyabean hulls effects or interaction were observed in relation to R.SH emission. We conclude that the interaction between dietary soyabean hulls and MAC may have an effect on noxious gas emission. The emission of NH 3 from pig faeces could be substantially reduced by diets enriched with soyabean hulls and emission of H 2 S both from pig faeces and slurry could be reduced by MAC supplementation. AU - Wang, Y. AU - Cho, J. H. AU - Chen, Y. J. AU - Yoo, J. S. AU - Kim, H. J. AU - Huang, Y. AU - Shin, S. O. AU - Zhou, T. X. AU - Kim, I. H. SP - 171 EP - 181 DA - 2008 DO - 10.22358/jafs/66597/2008 UR - https://doi.org/10.22358/jafs/66597/2008 ER -