文献类型: 外文期刊
作者: Wang, L. 1 ; Jiang, Z. Y. 1 ; Lin, Y. C. 1 ; Zheng, C. T. 1 ; Jiang, S. Q. 2 ; Ma, X. Y.;
作者机构: 1.Guangdong Acad Agr Sci, Inst Anim Sci,Lab Livestock & Poultry Breeding, Guangdong Publ Lab Anim Breeding & Nutr,State Key, Key Lab Anim Nutr & Feed Sci S China,Minist Agr, Guangzhou 510640, Guangdong, Peoples R China
2.Guangdong Acad Agr Sci, Inst Anim Sci,Lab Livestock & Poultry Breeding, Guangdong Publ Lab Anim Breeding & Nutr,State Key, Key Lab Anim Nutr & Feed Sci
关键词: Dibutyryl cAMP;Carcass traits;Growth performance;Finishing pigs
期刊名称:LIVESTOCK SCIENCE ( 影响因子:1.943; 五年影响因子:2.252 )
ISSN: 1871-1413
年卷期: 2012 年 146 卷 1 期
页码:
收录情况: SCI
摘要: This study was designed to investigate the effects of dietary supplementation with N-6, 2'-O-dibutyryl adenosine 3',5'-cyclic monophosphate (dbcAMP) on growth performance, carcass traits, histochemical characteristics and serum constituents in finishing pigs. Seventy-two Duroc x (Landrace x Large White) barrows (57.3 +/- 0.6 kg) were randomly allotted to 3 treatments with 6 replicate pens/treatment (4 pigs/pen). The pigs were fed diets containing 0, 10 and 20 mg dbcAMP/kg, respectively, until the final slaughter weight of approximately 90 kg. There were no differences in growth performance among dietary treatments. Leaf fat proportion and first rib backfat thickness were reduced (P<0.05), whereas tenth rib backfat thickness tended to decrease (P = 0.10), in pigs fed 10 mg dbcAMP/kg. Lean percentage was greater (P<0.05) and longissimus muscle area tended to increase (P = 0.10) in pigs fed 10 mg dbcAMP/kg when compared to the control group, but hot carcass weight was not affected by dbcAMP. Growth rate of fat-free lean tissues tended to increase (P = 0.09) in dbcAMP-supplemented pigs. Dietary dbcAMP decreased (P<0.05) adipocytes diameter in subcutaneous fat, whereas longissimus muscle fiber diameter tended to increase (P = 0.06) with dbcAMP supplementation; however, no difference in longissimus muscle cell density was detected among treatments. Serum concentrations of total protein and 3',5'-cyclic adenosine monophosphate increased (P<0.05) in response to dbcAMP, but concentrations of triglycerides, total cholesterol, glucose and urea in serum did not differ among dietary treatments. These results indicate that dbcAMP had a positive effect on carcass traits. Addition of 10 mg dbcAMP/kg to the diet was beneficial for growth performance and lean percentage, as well as improving protein and fat metabolism. (C) 2012 Elsevier B.V. All rights reserved.
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