Scientific Advances in Animal Nutrition Promise for the New Century: Proceedings of a Symposium (2001) / Chapter Skim
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6 Our Changing Environment: Developing Strategies for the Future
6 Our Changing Environment: Developing Strategies for the Future
Pages 38-43
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From page 38... ...
and the Environmental Protection Agency (EPA) have released a strategy for comprehensive nutrient management planning on farms for protecting water quality.
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From page 39... ...
Use of a computer model, the Cornell Net Carbohydrate and Protein System (CNCPS) , to accurately predict animal requirements and feed nutrients available to meet requirements while improving feeding management resulted in an additional annual increase in returns over feed costs of $42,000, while reducing nitrogen and phosphorus excretion by 25 to 33 percent.
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From page 40... ...
In four dairy farm case studies, use of the herd nutrition computer program along with improved feeding management indicated nitrogen and phosphorus in manure can be reduced by up to one third, while feed costs can be reduced by $50 to $130 per cow annually. The manure, crops, and soils computer program determines the amount of manure nutrients that can be recycled by the crops, and where and when to apply them to protect water quality.
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From page 41... ...
Farm plans will need to integrate all the components of that particular farm, such as animals, soils, crops, manure management, and farm business records. Complex computer models can be used for this task, given the availability of powerful computers at low cost and increased availability of information on farms such as feed intake and feed analyses, crop yields, soil tests, and information from the satellite-based Global Information System (GIS)
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From page 42... ...
A key component of protecting water quality is reducing nutrient loading through more accurate prediction of nutrient requirements. CAN's continual independent and objective advice is increasingly important for development of computer models that provide the biologic basis for predicting farm specific nutrient requirements, which allows economics and excretion rates with alternatives to be accurately predicted.
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From page 43... ...
1999. Impact of dairy farming on well water nitrate level and soil content of phosphorus and potassium.
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