THE INFLUENCE OF THE DAIRY COWS FEEDING ON THE METHANE AND CARBON DIOXIDE EQUIVALENT EMISSIONS FROM MANURE.

The research purpose to demonstrate that feed rations can be a tool that would help the husbandry sector reduce greenhouse gases. The researches were realized on the Moara Domneasca farm on a flock of 27 dairy cows at different stages of Montbeliarde's lactation between November 2019 and September 2020. The dairy cows have been divided into lots which have been given different breeding flocks. The rations in the 6 variants were administered during the summer and winter seasons. The dairy cows are kept in free stabulation in a shelter and management system of manure were considered paddock, solid system and lagoon/slurry. The methane emission from manure management was calculated using tier 2 from the IPCC 2006, specific farm data are available for GE, DE, VS, and for B0 and MCF were used default values. The results shows that methane and carbon dioxide equivalent emissions are the highest in variants 6 and 4 and the lowest in variant 1 with green fodder. Experimental variant of ration no. 1 and no. 5, which contain a large amount of green mass, show that methane emissions from manure management decrease compared to ration variations in which animals receive more concentrates feed. [ABSTRACT FROM AUTHOR]