Khurana Ruchita, Salami Saheed A, Poblete Roberto Bergmann, Fischer Angela, Cofré Lisseth Aravena, Bustos Viviana, Tas Bart M
Mootral GmbH, D-13467 Berlin, Germany.
Mootral Ltd., Roseheyworth Business Park North, Abertillery NP13 1SX, UK.
Animals (Basel). 2024 Jan 4;14(1):165. doi: 10.3390/ani14010165.
Two trials were conducted to evaluate the effect of a garlic and citrus extract supplement (GCE) on the milk production performance and carbon footprint of grazing dairy cows in a Chilean commercial farm. A total of 36 early- to mid-lactation and 54 late-lactation Irish Holstein-Friesian cows were used in Trial 1 and Trial 2, respectively. In both trials, the cows were reared under grazing conditions and offered a supplementary concentrate without or with GCE (33 g/cow/d) for 12 weeks. The concentrate was fed in the afternoon when the cows visited the milking parlour. Consequently, the results of milk production performance in these trials were used to determine the effect of feeding with GCE on the carbon footprint (CFP) of milk using a life cycle assessment (LCA) model. In Trial 1 and Trial 2, feeding with GCE increased estimated dry matter intake (DMI, kg/d) by 8.15% (18.4 vs. 19.9) and 15.3% (15.0 vs. 17.3), energy-corrected milk (ECM, kg/d) by 11.4% (24.5 vs. 27.3) and 33.5% (15.5 vs. 20.7), and feed efficiency (ECM/DMI) by 3.03% (1.32 vs. 1.36) and 17.8% (1.01 vs. 1.19), respectively. The LCA revealed that feeding with GCE reduced the emission intensity of milk by 8.39% (1.55 vs. 1.42 kg CO-eq/kg ECM). Overall, these results indicate that feeding with GCE improved the production performance and CFP of grazing cows under the conditions of the current trials.
进行了两项试验，以评估大蒜和柑橘提取物补充剂（GCE）对智利一家商业农场放牧奶牛产奶性能和碳足迹的影响。试验1和试验2分别使用了36头泌乳早期至中期和54头泌乳后期的爱尔兰荷斯坦-弗里生奶牛。在两项试验中，奶牛均在放牧条件下饲养，并在12周内提供不含或含有GCE（33克/头/天）的补充精饲料。精饲料在奶牛进入挤奶厅时于下午投喂。因此，这些试验中的产奶性能结果被用于使用生命周期评估（LCA）模型来确定投喂GCE对牛奶碳足迹（CFP）的影响。在试验1和试验2中，投喂GCE分别使估计干物质摄入量（DMI，千克/天）提高了8.15%（18.4对19.9）和15.3%（15.0对17.3），能量校正奶（ECM，千克/天）提高了11.4%（24.5对27.3）和33.5%（15.5对20.7），饲料效率（ECM/DMI）提高了3.03%（1.32对1.36）和17.8%（1.01对1.19）。生命周期评估显示，投喂GCE使牛奶的排放强度降低了8.39%（1.55对1.42千克CO2-eq/千克ECM）。总体而言，这些结果表明，在当前试验条件下，投喂GCE可提高放牧奶牛的生产性能和碳足迹。
