Comparison of In Vitro Gas Production Parameters of Dairy Cow Rations Prepared with Different Meals

Abstract

In this study, in vitro gas production (GP) parameters of rations created using different meals were compared. Soybean meal (SBM) (R1), sunflower meal (SFM) (R2) and canola meal (CM) (R3) were added to the rations as meal. A total of 7 rations were obtained by preparing rations in which these meals were added at different rates (R4, R5, R6 and R7). The difference between the nutritional values of the diets was balanced with maize DDGS. The feed values that make up the ration and the dry matter (DM), ash, crude protein (CP), ether extract (EE), in vitro gas, methane (_CH4) and carbon dioxide (CO₂) production amounts of 7 different rations were determined. Organic matter digestibility (OMD), metabolic energy (ME) and net energy lactation (NEL) values were calculated with the obtained in vitro gas production amounts. The amount of gas formed at the 24th hour of the incubation period of SFM, CM and SBM was found to be 31.77, 34.65, 50.34 ml, respectively. Among the groups in which the cakes were added alone, the highest gas production was determined as 59,20 ml in the SBM added R1 group, while the lowest was 50,54 ml in the CM added R3 group. The lowest amount of CH4 was found as 7.77 ml in the SFM added R2 group. It has been determined that the use of bagasses in the same ration produces more CH4 than their use alone. As a result of the research, it has been determined that the proportionally higher addition of SFM to the ration compared to SBM and CM contributes more economically and ecologically and causes an increase in digestibility. In addition, if one of SBM, SFM and CM will be added to the ration, it has been determined that it will be more economical to use SFM.