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Prediction of manure and nutrient excretion from dairy cattle |
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| Authors: | Nennich T D Harrison J H VanWieringen L M Meyer D Heinrichs A J Weiss W P St-Pierre N R Kincaid R L Davidson D L Block E |
| Affiliation: | 1 Puyallup Research and Extension Center, Washington State University, Puyallup 98371 2 Department of Animal Sciences, University of California, Davis 95616 3 Department of Dairy and Animal Science, The Pennsylvania State University, University Park 16802 4 Department of Animal Sciences, Ohio Agriculture Research and Development Center, The Ohio State University, Wooster 44691 5 Department of Animal Sciences, The Ohio State University, Columbus 43210 6 Department of Animal Sciences, Washington State University, Pullman 99163 7 Church & Dwight Co. Inc., Princeton, NJ 08543 |
| Abstract: | Accurate estimates of manure excretion are needed for planning manure storage facilities and for nutrient management. Data sets from metabolism studies conducted at several universities were compiled and evaluated for excretion of total manure, N, P, and K. Animal groups included calves weighing up to 204 kg, heifers weighing between 274 and 613 kg, nonlactating cows, and lactating cows. Regression equations were developed to predict excretion of total manure, total dry matter, N, P, and K. Predictors used in the regression equations for lactating cows included milk yield, percentages of protein and fat in milk, dietary concentrations of crude protein and neutral detergent fiber, and intakes of nutrients. The regression equations provide improved predictions of excretion and enable more accurate planning of manure storage and nutrients to be managed at the farm level. |
| Keywords: | manure nitrogen phosphorus potassium |
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