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Dairy Cow Manure Evaluation. Evaluating a dairy cows output can provide you with valuable input for optimizing feed efficiency and animal health. Dairy cow manure has high buffering capacity hence a substrate for anaerobic digestion however the process is not optimised in mono-digestion system due to limited substrate. Monitor manure scores 1 as very watery to 3 as ideal to 5 as stiff and stacking as rations change and cows increase in days in milk. At the 1999 Illinois Dairy Days a presentation on evaluating manure raised many questions and comments.
The technologies are experimental. Four aspects of manure evaluation can be considered. Dairy managers watch manure changes as a guide when making feed changes. However nutrient composition of. Manure evaluation may provide valuable information regarding the site and extent of both digestion and fermentation of consumed feeds. Manure evaluation should prompt questions and point you in the right general direction.
Fresh manure 24000 lbacre from lactating dairy cows can provide 160 24 and 74 lbacre of N P and K indicating that the ratio of nutrients required for crops is fairly balanced with the ratio of nutrients in fresh manure.
Economics Appendix 1 Appendix 2 ii. Energy to operate a full-scale anaerobic digester for dairy cow manure at the State Reformatory Honor Farm near Monroe Washington. The technologies are experimental. In a 200-cow dairy a walk-through that checks the manure of 15 to 20 cows should be able to provide enough observations to draw conclusions. Normally a majority of the feed consumed by the dairy cow is digested in the rumen and a majority of the nutrient absorption occurs in. Net Energy Evaluation VI.