Yang Seung Won, Kim Myeong Hyeon, Choi Jung-Seok, Jin Sang-Keun, Park Man-Jong, Song Young-Min, Lee Chul Young
Department of Animal Resources Technology, Gyeongnam National University of Science and Technology, Jinju 52725, Korea.
Swine Science and Technology Center, Gyeongnam National University of Science and Technology, Jinju 52725, Korea.
J Anim Sci Technol. 2019 Jan;61(1):10-17. doi: 10.5187/jast.2019.61.1.10. Epub 2019 Jan 31.
The present study was undertaken to investigate the effects of the plane of nutrition (PN) for growing-finishing pigs on growth performance and meat quality in summer. One hundred and two barrows and 102 gilts weighing approximately 44 kg were placed on a high-, medium-, or low-plane grower diet (HPG, MPG, or LPG) with ME and lysine concentrations ranging from 3.33 to 3.40 Mcal/kg and 0.93% to 1.15%, respectively, for 29 days in 6 replicates (pens) in total. Pigs from each grower pen were divided into two finisher pens and provided with a high-plane finisher diet (HPF) containing 3.40 Mcal ME and 9.5 g lysine/kg and a low-plane finisher diet (LPF; 3.25 Mcal ME and 8 g lysine/kg), respectively, up to approximately 110 kg, and slaughtered. Growth performance of the pigs, including average daily gain (ADG), average daily feed intake (ADFI), and gain:feed ratio, was not influenced by the grower-phase PN during any of the grower phase, a 31-d finisher phase I, and ensuing phase II. However, both the ADG and gain:feed ratio were greater ( < 0.05) for the HPF group than for the LPF group during the finisher phase I (748 vs. 653 g with SEM = 13 g and 0.333 vs. 0.299 with SEM = 0.008, respectively). The ADG, but not gain:feed ratio, was greater for the HPF group vs. LPF during the finisher phase II (673 vs. 623 g with SEM = 15 g for ADG and 0.322 vs. 0.323 with SEM = 0.005 for the gain:feed ratio). The carcass backfat thickness (BFT) was greater for the LPF group vs. HPF within the pigs which had been placed on LPG during the grower phase, but not within the pigs from the HPG or MPG group. Physicochemical characteristics of the muscle (LM) and sensory quality attributes of fresh and cooked LM were not influenced by either the grower-phase or finisher-phase PN. In conclusion, high PN is necessary for finishing pigs during the hot season to minimize the reduced rate of weight gain and also to prevent the increase of BFT that could result from low PN.
本研究旨在调查育肥猪的营养水平（PN）对夏季生长性能和肉质的影响。将102头体重约44 kg的公猪和102头母猪分为高、中、低营养水平的生长猪日粮组（HPG、MPG或LPG），代谢能（ME）和赖氨酸浓度分别为3.33至3.40Mcal/kg和0.93%至1.15%，共6个重复（栏），持续29天。每个生长猪栏的猪被分为两个育肥猪栏，分别提供高营养水平的育肥猪日粮（HPF，含3.40Mcal ME和9.5g赖氨酸/kg）和低营养水平的育肥猪日粮（LPF，含3.25Mcal ME和8g赖氨酸/kg），直至体重约110kg，然后屠宰。在生长阶段、31天的育肥第一阶段和随后的第二阶段，猪的生长性能，包括平均日增重（ADG）、平均日采食量（ADFI）和料重比，均不受生长阶段PN的影响。然而，在育肥第一阶段，HPF组的ADG和料重比均高于LPF组（分别为748 vs. 653g，标准误=13g；0.333 vs. 0.299，标准误=0.008）。在育肥第二阶段，HPF组的ADG高于LPF组，但料重比无差异（ADG为673 vs. 623g，标准误=15g；料重比为0.322 vs. 0.323，标准误=0.005）。在生长阶段饲喂LPG的猪中，LPF组的胴体背膘厚（BFT）高于HPF组，但在HPG或MPG组的猪中并非如此。肌肉（LM）的理化特性以及新鲜和煮熟LM的感官品质属性均不受生长阶段或育肥阶段PN的影响。总之，在炎热季节，育肥猪需要高PN水平，以尽量减少体重增加率的降低，并防止因低PN导致的BFT增加。
