Guidelines for Canadian Drinking Water Quality

Nutritional Factors Influencing the Nitrogen Composition of Bovine Milk: A Review

Selenium in the environment

Nutrient requirements of all livestock are based on the size of the animal, how active the animal is, the body growth rate, and/or the animal’s level of milk production and fat content in milk produced. Maintenance requirements are for low levels of activity as when being fed in a dry lot situation. When animals are on pasture activity increases and these the requirements may be as much as 25% higher due to this increased activity.

Nutrient Requirements of Sheep

C O N T E N T S I N T R O D U C T I O N . . 125 E N D O G E N O U S S E C R E T I O N I N T O T H E G A S T R O I N T E S T I N A L T R A C T . 126 SITES A N D M E C H A N I S M S O F G A S T R O I N T E S T I N A L P i A B S O R P T I O N . 126 N O N R U M I N A N T S . . . 126 Small intestines . . 126 Large intestines . . 128 RUMINANTS . . 129 Forestomach and abomasum . . . 129 Small intestines . . 129 Large intestines . . 130 H O R M O N A L R E G U L A T I O N OF P H O M E O S T A S I S . . 130 CONTROL OF EPITHELIAL P , TRANSPORT . . . 131 I N T E R A C T I O N S B E T W E E N P A N D ca HOMEOSTASIS . . . 131 D I E T A R Y P D E F I C I E N C Y I N R U M I N A N T S : E F F E C T S O N M I C R O B I A L M E T A B O L I S M I N T H E G A S T R O I N T E S T I N A L T R A C T . . 133 C O N C L U S I O N S . . 134 R E F E R E N C E S . . . 135

/pdf/comparative-aspects-of-gastrointestinal-phosphorus-2qsal3kgb1.pdf

Comparative aspects of gastrointestinal phosphorus metabolism.

Protein utilization in ruminants. i. blood urea nitrogen as affected by protein intake.

Phosphorus metabolism in lambs fed varying phosphorus intakes.

Protein requirements of growing-finishing cattle and lambs.

Whole-body retention, tissue distribution and excretion of selenium-75 after oral and intravenous administration in lambs fed varying selenium intakes.

R. L. Preston

Papers

Protein utilization in ruminants. i. blood urea nitrogen as affected by protein intake.

Phosphorus metabolism in lambs fed varying phosphorus intakes.

Protein requirements of growing-finishing cattle and lambs.

Whole-body retention, tissue distribution and excretion of selenium-75 after oral and intravenous administration in lambs fed varying selenium intakes.

In vitro uptake of selenium-75 by red blood cells from the immature ovine during varying selenium intakes.