Author: Thelton Mark Hill
Publisher:
ISBN:
Category : Calves
Languages : en
Pages : 340
Book Description
Effects of Source of Supplemental Nutrients on Forage Intake, Digestive Kinetics and Protein Supply to the Small Intestine of Grazing Calves
Author: Thelton Mark Hill
Publisher:
ISBN:
Category : Calves
Languages : en
Pages : 340
Book Description
Publisher:
ISBN:
Category : Calves
Languages : en
Pages : 340
Book Description
Farm Animal Metabolism and Nutrition
Author: J. P. Felix D'Mello
Publisher: CABI
ISBN: 0851993788
Category : Nature
Languages : en
Pages : 450
Book Description
This book presents specially commissioned reviews of key topics in farm animal metabolism and nutrition, such as repartitioning agents, near infrared reflectance spectroscopy and digestibility and metabolisable energy assays, where major advances have recently been made or which continue to represent issues of significance for students and researchers. Authors include leading researchers from Europe, North America and Australia.
Publisher: CABI
ISBN: 0851993788
Category : Nature
Languages : en
Pages : 450
Book Description
This book presents specially commissioned reviews of key topics in farm animal metabolism and nutrition, such as repartitioning agents, near infrared reflectance spectroscopy and digestibility and metabolisable energy assays, where major advances have recently been made or which continue to represent issues of significance for students and researchers. Authors include leading researchers from Europe, North America and Australia.
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 724
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 724
Book Description
Effects of Supplemental Energy and Protein on Forage Digestion and Urea Kinetics in Beef Cattle
Author: Eric Arthur Bailey
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Two experiments quantified effects of supplemental protein and energy on forage digestion and urea kinetics in beef cattle. In experiment 1, energy treatments included: control, 600 g glucose dosed ruminally once daily, and 480 g VFA infused ruminally over 8 h daily. Casein was dosed ruminally once daily (120 or 240 g). Cattle (208 kg) had ad libitum access to low-quality hay (5.8% protein). Infusion of VFA decreased forage intake by 27%. Glucose decreased NDF digestibility. Microbial N flow was greater for 240 than for 120 g/d casein, but was not affected by energy. Retained N increased with casein supply. Urea-N entry rate (UER) and gut entry of urea-N (GER) were not affected by energy, casein, or interactions, but GER/UER was less when 240 rather than 120 g/d casein was provided. Compared to VFA, glucose tended to increase GER/UER. Glucose led to more microbial uptake of recycled urea than VFA. In these young calves, changes in N and energy supply did not greatly impact urea kinetics, likely because increased N was largely retained. In experiment 2, treatments included: 0 or 1.2 kg glucose, and 240 or 480 g casein. Cattle (391 kg) were fed low-quality hay (4.7% protein). Glucose reduced forage intake by 18%, whereas casein did not affect it, and depressed fiber digestion. Microbial N flow to the duodenum and retained N increased as casein increased, but neither was affected by glucose. Increasing casein increased UER 50%. Urinary urea-N increased as casein increased; moreover, GER numerically increased 25% as casein increased. GER/UER decreased as casein increased. Glucose decreased urinary urea, but did not change UER or GER. Microbial uptake of recycled urea was least for steers receiving 480 g/d casein with no glucose, reflecting that this treatment exceeded ruminal requirement for N. In these more mature steers, increases in N intake increased UER, reflecting that only small proportions of the increased N intake were retained. Thus, as steer maturity increased, UER and GER increased, likely because less N was retained. These studies demonstrate the influence of urea recycling in meeting N needs of cattle fed low-quality forage.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Two experiments quantified effects of supplemental protein and energy on forage digestion and urea kinetics in beef cattle. In experiment 1, energy treatments included: control, 600 g glucose dosed ruminally once daily, and 480 g VFA infused ruminally over 8 h daily. Casein was dosed ruminally once daily (120 or 240 g). Cattle (208 kg) had ad libitum access to low-quality hay (5.8% protein). Infusion of VFA decreased forage intake by 27%. Glucose decreased NDF digestibility. Microbial N flow was greater for 240 than for 120 g/d casein, but was not affected by energy. Retained N increased with casein supply. Urea-N entry rate (UER) and gut entry of urea-N (GER) were not affected by energy, casein, or interactions, but GER/UER was less when 240 rather than 120 g/d casein was provided. Compared to VFA, glucose tended to increase GER/UER. Glucose led to more microbial uptake of recycled urea than VFA. In these young calves, changes in N and energy supply did not greatly impact urea kinetics, likely because increased N was largely retained. In experiment 2, treatments included: 0 or 1.2 kg glucose, and 240 or 480 g casein. Cattle (391 kg) were fed low-quality hay (4.7% protein). Glucose reduced forage intake by 18%, whereas casein did not affect it, and depressed fiber digestion. Microbial N flow to the duodenum and retained N increased as casein increased, but neither was affected by glucose. Increasing casein increased UER 50%. Urinary urea-N increased as casein increased; moreover, GER numerically increased 25% as casein increased. GER/UER decreased as casein increased. Glucose decreased urinary urea, but did not change UER or GER. Microbial uptake of recycled urea was least for steers receiving 480 g/d casein with no glucose, reflecting that this treatment exceeded ruminal requirement for N. In these more mature steers, increases in N intake increased UER, reflecting that only small proportions of the increased N intake were retained. Thus, as steer maturity increased, UER and GER increased, likely because less N was retained. These studies demonstrate the influence of urea recycling in meeting N needs of cattle fed low-quality forage.
Ecology, Production, and Management of Lolium for Forage in the USA
Author: Francis Marion Rouquette
Publisher: American Society of Civil Engineers
ISBN:
Category : Nature
Languages : en
Pages : 164
Book Description
Publisher: American Society of Civil Engineers
ISBN:
Category : Nature
Languages : en
Pages : 164
Book Description
CSSA Special Publication
The Effects of Source of Supplemental Protein on Intake and Digestibility in Calves Grazing Bermudagrass Pasture
Author: Steven David Martin
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 98
Book Description
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 98
Book Description
Cumulated Index Medicus
Influence of Supplemental Protein on Daily Grazing Time, Forage Intake, Digests and Ruminal Kinetics, Ruminal Fermentation and Digestion in Beef Cattle Grazing Dormant Intermediate Wheatgrass Pasture
Author: Bret Hess
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 206
Book Description
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 206
Book Description