Effects of dietary supplementation with green tea polyphenols on digestion and meat quality in lambs infected with Haemonchus contortus.
Ujumqin sheep are susceptible to infection by the gastrointestinal nematode Haemonchus contortus, which reduces productivity and total meat yield in sheep. Thus, the effects of green tea polyphenol (GTP) supplements (0, 2, 4, or 6g of GTP/kg feed) on dietary nutrient digestibility and meat quality in lambs infected with H. contortus were examined; control lambs were not infected. H. contortus infections did not affect digestion but the apparent digestibilities of nutrients were decreased by dietary 2g of GTP/kg feed supplementation. There was an interaction between treatment and sampling time on plasma total protein, urea nitrogen, and amino acid concentrations. The antioxidant activity and meat color of INFGTP0 lambs decreased. In conclusion, H. contortus infections in lambs decreased meat quality, but appropriate levels of dietary GTP supplementation diminished these negative effects though lower dose of GTP supplement showed negative effects on digestion.
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, PR China; College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin 130118, PR China.
R Z
RZ
Zhong
College of Animal Science and Technology, Jilin Agricultural University, Changchun, Jilin 130118, PR China.
H Y
HY
Li
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, PR China.
Y
Y
Fang
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, PR China.
H X
HX
Sun
Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin 130102, PR China. Electronic address: zhoudaowei@iga.ac.cn.
D W
DW
Zhou
D000596:Amino Acids / Q000032:analysis / Q000097:blood; D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage / Q000009:adverse effects / Q000032:analysis / Q000627:therapeutic use; D028241:Camellia sinensis / Q000737:chemistry; D002681:China; D004032:Diet / Q000009:adverse effects / Q000662:veterinary*; D004063:Digestion; D005243:Feces / Q000737:chemistry / Q000469:parasitology; D005511:Food Handling; D063427:Food Quality; D006188:Haemonchiasis / Q000178:diet therapy / Q000378:metabolism / Q000469:parasitology / Q000662:veterinary*; D006189:Haemonchus / Q000302:isolation & purification; D008297:Male; D008460:Meat / Q000032:analysis / Q000469:parasitology; D018482:Muscle, Skeletal / Q000737:chemistry / Q000378:metabolism*; D010860:Pigments, Biological / Q000032:analysis / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry; D059808:Polyphenols / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D012756:Sheep; D012757:Sheep Diseases / Q000097:blood / Q000178:diet therapy* / Q000378:metabolism / Q000469:parasitology; D034561:Sheep, Domestic; D013662:Tea / Q000737:chemistry*; D017392:Thiobarbituric Acid Reactive Substances / Q000032:analysis / Q000378:metabolism
D000596:Amino Acids; D000975:Antioxidants; D010860:Pigments, Biological; D059808:Polyphenols; D013662:Tea; D017392:Thiobarbituric Acid Reactive Substances
Haemonchus contortus; Lamb; Meat quality; Tea polyphenols