NWIPB OpenIR
Digestibility, nutrient balance and urinary purine derivative excretion in dry yak cows fed oat hay at different levels of intake
Long, RJ; Dong, SK; Hu, ZZ; Shi, JJ; Dong, QM; Han, XT
2004-06-01
Source PublicationLIVESTOCK PRODUCTION SCIENCE
Volume88Issue:1-2Pages:27-32
SubtypeArticle
AbstractA feeding trial A as conducted at the farm of Qinghai Academy of Animal and Veterinary Science, Xining, China during 1996 - 1997 with three dry yak cows (initial body weight 163 - 197 kg, age 5 - 6 years) by using 3 x 3 Latin Square Design to determine the effect of levels of feed intake on digestion, nitrogen balance and purine derivative excretion in urine of yak cows. The animals were fed oat hay (nitrogen 13.5 g/kg dry matter (DM), metabolisable energy 8.3 MJ/kg DM), i.e., 0.3, 0.6 and 0.9 of voluntary intake (VI). Each intake treatment lasted for 17 days and the samples (feeds, faeces and urine) were collected during last 7 days of each period. The results indicate that digestibility of dietary DM, OM, NDF and ash declined when intake levels increased from 0.3 to 0.9 VI [DM, from 66.1% to 59.1% (P < 0.05); OM, from 68.1% to 59.9% (P < 0.05); NDF, from 62.1% to 54.3% (P < 0.05); and ash, from 33.9% to 11.8% (P < 0.05)]. Around 0.10 g N/kg W-0.75 was deficient daily in yak cows at 0.3 VI, and positive N balances were observed at 0.6 and 0.9 VI. Intake levels significantly (P < 0.05) affected total PD excretion in yak urine. The proportion of allantoin increased (P < 0.05) and uric acid decreased (P < 0.05) as intake level of feed increased. (C) 2004 Elsevier B.V. All rights reserved.; A feeding trial A as conducted at the farm of Qinghai Academy of Animal and Veterinary Science, Xining, China during 1996 - 1997 with three dry yak cows (initial body weight 163 - 197 kg, age 5 - 6 years) by using 3 x 3 Latin Square Design to determine the effect of levels of feed intake on digestion, nitrogen balance and purine derivative excretion in urine of yak cows. The animals were fed oat hay (nitrogen 13.5 g/kg dry matter (DM), metabolisable energy 8.3 MJ/kg DM), i.e., 0.3, 0.6 and 0.9 of voluntary intake (VI). Each intake treatment lasted for 17 days and the samples (feeds, faeces and urine) were collected during last 7 days of each period. The results indicate that digestibility of dietary DM, OM, NDF and ash declined when intake levels increased from 0.3 to 0.9 VI [DM, from 66.1% to 59.1% (P < 0.05); OM, from 68.1% to 59.9% (P < 0.05); NDF, from 62.1% to 54.3% (P < 0.05); and ash, from 33.9% to 11.8% (P < 0.05)]. Around 0.10 g N/kg W-0.75 was deficient daily in yak cows at 0.3 VI, and positive N balances were observed at 0.6 and 0.9 VI. Intake levels significantly (P < 0.05) affected total PD excretion in yak urine. The proportion of allantoin increased (P < 0.05) and uric acid decreased (P < 0.05) as intake level of feed increased. (C) 2004 Elsevier B.V. All rights reserved.
KeywordIntake Level Digestion Purine Derivatives Creatinine Excretion Dry Yak Cows
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Subject Area农业科学
WOS KeywordFEED-INTAKE ; SHEEP ; RUMINANTS ; CATTLE ; PERFORMANCE ; DIGESTION ; NITROGEN ; PLASMA ; STEERS
Indexed BySCI
Language英语
WOS Research AreaAgriculture
WOS SubjectAgriculture, Dairy & Animal Science
WOS IDWOS:000222049700004
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/1395
Collection中国科学院西北高原生物研究所
Affiliation1.Beijing Normal Univ, Inst Environm Sci, Beijing 100875, Peoples R China
2.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810018, Peoples R China
3.Gansu Agr Univ, Grassland Sci Coll, Lanzhou 730070, Peoples R China
4.Qinghai Acad Anim & Vet Sci, Xining 810003, Peoples R China
Recommended Citation
GB/T 7714
Long, RJ,Dong, SK,Hu, ZZ,et al. Digestibility, nutrient balance and urinary purine derivative excretion in dry yak cows fed oat hay at different levels of intake[J]. LIVESTOCK PRODUCTION SCIENCE,2004,88(1-2):27-32.
APA Long, RJ,Dong, SK,Hu, ZZ,Shi, JJ,Dong, QM,&Han, XT.(2004).Digestibility, nutrient balance and urinary purine derivative excretion in dry yak cows fed oat hay at different levels of intake.LIVESTOCK PRODUCTION SCIENCE,88(1-2),27-32.
MLA Long, RJ,et al."Digestibility, nutrient balance and urinary purine derivative excretion in dry yak cows fed oat hay at different levels of intake".LIVESTOCK PRODUCTION SCIENCE 88.1-2(2004):27-32.
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