Effect of supplementation with protein differ for rumen degradability on milk production and nutrients utilization in early lactating Sahiwal cows

Effect of supplementation with protein differ for rumen degradability on milk production and nutrients utilization in early lactating Sahiwal cows

Early lactating Sahiwal cows (n=24) of approximately similar yield and lactation were selected and randomly divided into four groups of six cows in each. These groups were fed ad libitum four iso- energetic and iso- proteic diets with different rumen undegradable protein (RUP) sources: diet A 30% RU...

Full description

Saved in:
Bibliographic Details
Published in:Italian journal of animal science Vol. 11; no. 1; p. e11
Main Authors: Marghazani, Illahi B., Jabbar, Makhdoon A., Pasha, Talat N., Abdullah, Muhammad
Format: Journal Article
Language:English
Published: Bologna Taylor & Francis 01-01-2012
Taylor & Francis Ltd
PAGEPress Publications
Taylor & Francis Group
Subjects:
Degradability
Diet
Dietary supplements
Digestibility
Dry matter
Lactation
Lactose
Milk
Milk composition
Milk production
Nitrogen
Nitrogen balance
Nutrient digestibility
Nutrients
Proteins
Rumen
Rumen undegradable protein
Rumen undegradable protein, Nutrient digestibility, Milk composition
Salts
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Early lactating Sahiwal cows (n=24) of approximately similar yield and lactation were selected and randomly divided into four groups of six cows in each. These groups were fed ad libitum four iso- energetic and iso- proteic diets with different rumen undegradable protein (RUP) sources: diet A 30% RUP, diet B 40% RUP, diet C 50% RUP and diet D 60% RUP in a completely randomized design. Among nutrients intake, dry matter (DM) and crude protein (CP) intake was significantly (P<0.01) different, while neutral detergent fibre (NDF) and acid detergent fibre (ADF) intakes were similar across four diets. DM, CP and NDF digestibility were also different (P<0.05) except, NDF digestibility. Whole milk yield (kg/d) and 4% fat corrected milk (FCM) (kg/d), fat (g/d) and protein (g/d) was found maximum on diet B, followed by diet A. Not significant differences were found in fat, solid not fat (SNF), protein, lactose, salts and total solids percentage across all diet except SNF, lactose and salts percentages which were significantly lower (P<0.05) on diet D. Nitrogen intake, balance and utilization were statistically similar across all diets however, nitrogen excretion in milk (g/d and percentage of intake) and urine (percentage of intake) were significantly different across diets. Nitrogen intake and output varied (P<0.01) across all diets. Nitrogen balance and its utilization were maximum (P<0.001) on diet B, while other diets showed not significant differences among themselves. Based on presenting findings, it is concluded that feed intake, digestibility and production performance was maximum in early lactating Sahiwal cows when fed 40% rumen undegradable protein in total mixed ration based diet.
ISSN:1828-051X
1594-4077
1828-051X
DOI:10.4081/ijas.2012.e11