Ammonia emissions reduction possibilities from dairy farms
2018
Priekulis, J., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Melece, L., Latvia Univ. of Life Sciences and Technologies, Priekuli, Priekuli parish, Priekuli Municipality (Latvia). Inst. of Agricultural Resources and Economics
Ammonia emissions reduction possibilities from dairy farms, where liquid manure is produced, have been investigated. For comparison five technological versions have been selected that differ by the type of dairy cattle handling as well as manure management, particularly removal. Besides, also three ammonia emissions reduction options have been evaluated: usage of straw litter, usage of liquid manure chemical and bacteriological additives and pasturing of dry cows. For every production version the possible exploitation costs, euro per year, and the specific costs calculating per the amount of nitrogen left in manure, euro per kg, have been determined. In the research it has been found that the most effective way of reduction of ammonia emissions is replacing of high boxes with deep boxes with straw litter. In this case, comparing with usage of high boxes, the manure removal costs as well as the specific costs that are referable to the amount of nitrogen left in manure are reduced by 30−35 %. Adding of chemical or bacteriological additives to liquid manure and pasturing of dairy cattle reduce the specific costs by 5−7 %. Nevertheless, in the calculations it has not been included that adding of these additives in manure collection canals that are installed in the barn reduces ammonia emissions not only in the barn, but also in the manure storage. Therefore, the obtained cost-effectiveness is even greater.
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