Kim B G, Kil D Y, Mahan D C, Hill G M, Stein H H
Department of Animal Science and Environment, Konkuk University, Seoul 143-701, Republic of Korea.
Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 456-756, Republic of Korea.
J Anim Sci. 2014 Oct;92(10):4486-93. doi: 10.2527/jas.2013-6323. Epub 2014 Aug 22.
Inclusion of up to 0.38% S in diets that contain 30% distillers dried grains with solubles (DDGS) has no negative effect on growth performance of growing-finishing pigs, but there is no information about the effects of dietary S on accumulation of S in tissues in pigs. Therefore, the objective of this experiment was to determine if the concentration of S in diets containing DDGS affects carcass characteristics, loin quality, or tissue mineral concentrations in growing-finishing pigs. A total of 120 barrows (34.2 ± 2.3 kg BW) were allotted to 3 dietary treatments with 10 replicate pens and 4 pigs per pen in a randomized complete block design. Pigs were fed grower diets for 42 d and finisher diets for 42 d. At the conclusion of the experiment, the pig in each pen with the BW closest to the pen average was slaughtered. The control diet was based on corn and soybean meal and the finisher diet contained 0.14% S, 0.19 mg/kg Se, and 15.3 mg/kg Cu. The DDGS diet was formulated with corn, soybean meal, and 30% DDGS and the finisher diet with DDGS contained 0.16% S, 0.32 mg/kg Se, and 14.0 mg/kg Cu. The DDGS plus S (DDGS-S) diet was similar to the DDGS diet, except that 1.10% CaSO4 (16.2% S) was included in this diet, and the finisher diet with DDGS-S contained 0.37% S, 0.35 mg/kg Se, and 13.8 mg/kg Cu. Results indicated that organ weights and loin quality, 24-h pH, drip loss, loin subjective color, marbling, and firmness did not differ among treatments, but loin a* was greater (P < 0.05) for pigs fed the control diet than for pigs fed the DDGS-S diet. Concentrations of S in hair, liver, heart, loin, and all other tissues did not differ among treatments, but urinary S concentration was greater (P < 0.05) for pigs fed the DDGS-S diet than for pigs fed the other diets. Pigs fed the DDGS diet or the DDGS-S diet had greater (P < 0.01) concentrations of Se in hair, liver, heart, and loin than pigs fed the control diet, but liver concentrations of Cu did not differ among treatments. In conclusion, inclusion of 30% DDGS in diets fed to growing-finishing pigs did not influence carcass characteristics or tissue S concentrations regardless of S concentration in the diet, and excess dietary S was excreted in the urine. However, because of the greater concentration of Se in DDGS than in corn and soybean meal and, therefore, greater concentrations in DDGS-containing diets, tissue concentrations of Se were increased in pigs fed diets that contained DDGS. In contrast, dietary DDGS did not influence liver concentrations of Cu.
在含有30% 酒糟蛋白（DDGS）的日粮中添加高达0.38% 的硫对生长育肥猪的生长性能没有负面影响，但关于日粮中的硫对猪组织中硫积累的影响尚无相关信息。因此，本试验旨在确定含DDGS日粮中的硫浓度是否会影响生长育肥猪的胴体特性、腰肉品质或组织矿物质浓度。总共120头公猪（体重34.2±2.3千克）被随机分配到3种日粮处理组，采用随机完全区组设计，每组10个重复栏，每栏4头猪。猪先饲喂育成期日粮42天，再饲喂育肥期日粮42天。试验结束时，每个栏中体重最接近栏平均体重的猪被屠宰。对照日粮以玉米和豆粕为基础，育肥期日粮含0.14% 的硫、0.19毫克/千克的硒和15.3毫克/千克的铜。含DDGS的日粮由玉米、豆粕和30% 的DDGS配制而成，含DDGS的育肥期日粮含0.16% 的硫、0.32毫克/千克的硒和14.0毫克/千克的铜。含DDGS加硫（DDGS-S）的日粮与含DDGS的日粮相似，只是该日粮中添加了1.10% 的硫酸钙（含硫16.2%），含DDGS-S的育肥期日粮含0.37% 的硫、0.35毫克/千克的硒和13.8毫克/千克的铜。结果表明，各处理组之间的器官重量、腰肉品质、24小时pH值、滴水损失、腰肉主观颜色、大理石花纹和硬度没有差异，但饲喂对照日粮的猪的腰肉a*值高于饲喂DDGS-S日粮的猪（P<0.05）。各处理组之间猪毛、肝脏、心脏、腰肉和所有其他组织中的硫浓度没有差异，但饲喂DDGS-S日粮的猪的尿硫浓度高于饲喂其他日粮的猪（P<0.05）。饲喂含DDGS日粮或DDGS-S日粮的猪的猪毛、肝脏、心脏和腰肉中的硒浓度高于饲喂对照日粮的猪（P<0.01），但各处理组之间肝脏中的铜浓度没有差异。总之，在生长育肥猪日粮中添加30% 的DDGS，无论日粮中的硫浓度如何，均不影响胴体特性或组织硫浓度，过量的日粮硫通过尿液排出。然而，由于DDGS中的硒浓度高于玉米和豆粕，因此含DDGS日粮中的硒浓度更高，饲喂含DDGS日粮的猪的组织硒浓度升高。相比之下，日粮中的DDGS对肝脏中的铜浓度没有影响。
