Abstract
Effects of Quality and Amounts of Dietary Protein on Dairy Cattle Reproduction and the Environment
Highlights
Protein is an important limiting nutrient in ruminants [1]
The route and amount of N excretion are of primary environmental concern; urinary N is more volatile than faecal N and is rapidly converted to ammonia
The process of ammonia volatilization occurs by mass transfer from the top layer of the manure slurry to the air surrounding the manure surface
Summary
An excess amount of protein beyond the requirements of dairy cow affects reproduction as well as the environment. Excess rumen degradable protein results in high amounts of ammonia in the blood of dairy cow when there is no sufficient amount of energy to convert ammonia into microbial protein. Conversion of excess ammonia is energy demanding which can result in negative energy balance. It is important to optimize rumen degradable and rumen undegradable protein content of diets and synchronization of protein with energy is best strategies to overawed ammonia pollution and reproductive problem in the dairy cows.
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