Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 1
Written by Dana POPA, Monica MARIN, Elena POGURSCHI, Tomița DRĂGOTOIU, Răzvan POPA, Mihaela BĂLĂNESCU, Georgeta DINIȚĂ
The aim of the research undertaken was to highlight that emission reductions can be made available to producers in the steer farming sector and the adoption of current best practices and technologies for the rearing and health of animals, feed rations can be a tool that would help the dragline sector reduce greenhouse gases, and was 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. Daily milk production was establised per lactation cycle, within the lactation cycle of 3 distinct stages and the establishment of two seasons, summer and winter. The influence of feed strategies applied on milk production, manure chemical composition and CH4 and CO2 emissions were analyzed. The dairy production of the cows varied in the management of green feed rations between 21.97 L/head in the upward stage of lactation and 20.54 L/head in the plateau phase and in winter succulent rations, milk production was 21.29 L/head in the ascending phase, 19.93-20.27 L/head in the plateau phase and 18.56 L/head in the ascending phase. The methane emission from enteric fermentation has the highest values for the variants 6 and 4, which contains rots (sunflower and soybean), maize, and wheat bran and the lowest emissions are recorded for the ration variant 1 which is rich in green fodder.
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