title: Effects of dietary potential Acid production value on productivity in dairy cows.
abstract: This study was conducted to estimate the potential acid production value (PAPV) of major diets and to determine the relationship between dietary PAPV and dairy production traits. Estimation of PAPV of major cattle feeds was based on an in vitro technique, which determined the degree of Ca dissociation from CaCO3. Data on feeds and production traits were collected on 744 multiparous lactating Holstein dairy cows from five different farms. Grains had high PAPV with variable protein sources and by-products. High PAPV feedstuffs had a higher total gas production and lower pH compared to those with low PAPV. Dietary PAPV had a positive correlation with intake of dry matter, NDF, ADF, milk yield and milk solid production but a negative correlation with milk protein and milk fat concentration. Current results indicate that dietary PAPV can be utilized in predicting dairy production traits.
authors: Division of Applied Life Science (BK21 Program), IALS, Graduate School of Gyeongsang National University, Jinju 660-701, Korea .
authors: E T
authors: ET
authors: Kim
authors: Division of Applied Life Science (BK21 Program), IALS, Graduate School of Gyeongsang National University, Jinju 660-701, Korea .
authors: S S
authors: SS
authors: Lee
authors: Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Korea .
authors: H J
authors: HJ
authors: Kim
authors: Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Korea .
authors: J Y
authors: JY
authors: Song
authors: School of Animal Life and Environment Science, Hankyong National University, Anseong, 456-749, Korea .
authors: C-H
authors: CH
authors: Kim
authors: Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Korea .
authors: Jong K
authors: JK
authors: Ha
keywords: Dairy Cow; Metabolic Disease; Milk Yield; Potential Acid Production Value (PAPV); Ruminal Fermentation; TMR