Impacts of weaning age on dietary needs of whey permeate for pigs at 7 to 11 kg body weight

• 作者: Ki Beom Jang Marcos Elias Duarte Jerry M.Purvis Sung Woo Kim
• 来源期刊: 畜牧与生物技术杂志（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: ANIMAL NUTRITION AND FEEDSTUFFS
• 页码范围: 593-600
• 页数: 8页
• 语种: 英文

摘要

Background:Whey permeate is an effective lactose source for nursery pigs and the most benefits are obtained when pigs are at 7 to 11 kg BW. Altering weaning ages could cause different length of early-weaner phases until 7 kg BW and thus it would influence the dietary need of whey permeate during 7 to 11 kg BW of pigs. This study aimed to evaluate if weaning ages would affect the dietary needs of whey permeate for optimum growth performance of pigs at 7 to 11 kg BW. Methods:A total of 1,632 pigs were weaned at d 21 (d 21.2 ± 1.3) or d 25 (d 24.6 ± 1.1) after birth. All pigs had a common early-weaner feeds until they reached 7 kg BW. When pigs reached 7 kg BW within a weaning age group, they were allotted in a randomized complete block design (2 × 4 factorial). Two factors were weaning age groups (21 and 25 d of age) and varying whey permeate levels (7.50％, 11.25％, 15.00％, and 18.75％). Data were analyzed using the GLM and NLIN procedures of SAS for slope-ratio and broken-line analyses to determine the growth response to whey permeate and optimal daily whey permeate intake for the growth of the pigs weaned at different ages. Results:Pigs weaned at 21 d of age had a common diet for 11 d to reach 7 kg BW whereas pigs weaned at 25 d of age needed 2 d. The G:F of pigs weaned at 25 d of age responded to increased daily whey permeate intake greater (P<0.05) than pigs weaned at 21 d of age. Breakpoints were obtained (P<0.05) at 88 and 60 g/d daily whey permeate intake or 17.0％and 14.4％of whey permeate for G:F of pigs weaned at 21 and 25 d of age, respectively. Conclusion:Pigs weaned at an older age with a short early-weaner phase had a greater growth response to whey permeate intake compared with pigs weaned at a younger age with a long early-weaner phase. Altering weaning ages affected dietary needs of whey permeate for optimum growth performance of pigs from 7 to 11 kg BW.