This comprehensive volume examines the interrelationships of
nitrogen and energy nutrition of ruminants. It provides exhaustive
coverage of basic concepts, applications, and new research
developments.
Rumen microbial activity is emphasized. The author, an expert in
animal nutrition, discusses new systems of determining dietary
energy requirements, the effect of processing feedstuffs, and
stress factors. He reviews the availability of nutrients in grains,
distillers' grain residues, oilseed meals, molasses, silages,
pastures, crop residues, and aquatic plants. Growth stimulants,
nutritional management of ruminants in feedlots and pastures, and
the value of feed additives are also among the topics
considered.
The scope of coverage provided by this volume will make it the
leading reference for teachers, researchers, consultants, livestock
producers, feed manufacturers, and all others who are involved in
ruminant feeding and nutrition.
From the Preface: This volume covers research on various nitrogen
and energy feedstuffs and defines terminology commonly utilized in
nitrogen and energy nutrition. The utilization of nitrogen and
energy in oilseed meals, fish meals, cereal grains, distillers'
residues, molasses, silages, grasses, hays, crop residues, animal
waste, and nonprotein nitrogen sources is discussed. Details are
given on development and utilization of net energy systems, systems
for balancing total nitrogen, and nonprotein nitrogen with total
digestible nutrients (TDN) or energy components of ruminant diets.
Discussions are presented on metabolism, feedlot, milking, and
grazing trials. Growth stimulants, processing of feedstuffs, type
of animal, and environmental and management factors that affect
feed intake, growth, feed efficiency, and quality of product are
reviewed.
Emphasis is given to the contributions of ruminal microbes in
upgrading forage and nonprotein nitrogen sources to higher-quality
bacterial protein, as well as their ability to downgrade
high-quality protein and waste nitrogen when protein is fed in
excess of microbial needs. Research is presented on means to
increase bypassing of the rumen to prevent nitrogen wastage when
ruminants are fed concentrate diets. Contributions of ruminal
microbes in utilizing cellulosic materials as lignocellulose and
hemicellulose as well as starch and other carbohydrates are
discussed.
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