Nitrogen and phosphorus nutrition of cattle : reducing the environmental impact of cattle operations

There are tremendous benefits to feeding ruminants nitrogen and phosphorus supplements, in terms of milk production and productivity. However what goes in, must also come out. Nitrogen and phosphorus excretions from dairy cattle are a major environmental pollutant. This book describes the latest knowledge in nitrogen and phosphorus nutrition of cattle including requirements, ruminal and total tract metabolism, possibilities of increasing the efficiency of nitrogen utilization and reducing nitrogen and phosphorus excretions from dairy and beef operations. It also includes aspects of the effects of dietary nitrogen and phosphorus on the reproductive efficiency of cattle. There are tremendous benefits to feeding ruminants nitrogen and phosphorus supplements, in terms of milk production and productivity. However, what goes in must also come out. Nitrogen and phosphorus excretions from dairy cattle are a major environmental pollutant. This book describes the latest knowledge in nitrogen and phosphorus nutrition of cattle including requirements, ruminal and total tract metabolism, possibilities of increasing the efficiency of nitrogen utilization and reducing nitrogen and phosphorus excretions from dairy and beef operations. It also includes aspects of the effects of dietary nitrogen and phosphorus on the reproductive efficiency of cattle. This book will be of significant interest to researchers in animal nutrition, animal science and environmental (pollution) science Contents......Page 5 Contributors......Page 6 1 Interactions between Cattle and the Environment: a General Introduction......Page 15 2 Nitrogen Requirements of Cattle......Page 27 3 Nitrogen Metabolism in the Rumen......Page 85 4 Factors Affecting the Efficiency of Nitrogen Utilization in the Rumen......Page 131 5 Whole-animal Nitrogen Balance in Cattle......Page 181 6 Phosphorus Metabolism in the Rumen......Page 201 7 Phosphorus Metabolism in Ruminants and Requirements of Cattle......Page 209 8 Effects of Dietary Phosphorus and Nitrogen on Cattle Reproduction......Page 247 9 Improving the Efficiency of Nutrient Use on Cattle Operations......Page 269 A......Page 295 F......Page 296 M......Page 297 P......Page 298 S......Page 301 W......Page 302 Contents 5 Contributors 6 1 Interactions between Cattle and the Environment: a General Introduction 15 2 Nitrogen Requirements of Cattle 27 3 Nitrogen Metabolism in the Rumen 85 4 Factors Affecting the Efficiency of Nitrogen Utilization in the Rumen 131 5 Whole-animal Nitrogen Balance in Cattle 181 6 Phosphorus Metabolism in the Rumen 201 7 Phosphorus Metabolism in Ruminants and Requirements of Cattle 209 8 Effects of Dietary Phosphorus and Nitrogen on Cattle Reproduction 247 9 Improving the Efficiency of Nutrient Use on Cattle Operations 269 Index 295 A 295 B 296 C 296 D 296 E 296 F 296 G 297 H 297 I 297 L 297 M 297 N 298 O 298 P 298 R 301 S 301 T 302 U 302 V 302 W 302