ISSUE FOCUS 32 FEED & ADDITIVE MAGAZINE May 2024 ECM effect with Phytogenics (kg/day) 3.5 3 2.5 2 1.5 1 0.5 0 0.9 0.6 1.0 1.3 1.5 1.8 1.8 0.7 2.0 1.4 3.2 Energy Corrected Milk (ECM) 52 DC (30L) - Taiwan 12 DC (31L) - France 32 DC (31L) - USA 140 DC (31L) - Taiwan 52 DC (30L) - Germany 180 DC (26.5L) - Turkey 800 DC (41.5L) - China 40 DC (32L) - Fr - INRA 107 DC (28L) - China 285 DC (40L) - Sp Average income after feed costs and has implications for environmental impact. Target FE values vary based on the stage of lactation, with different targets for cows at different stages. Defining FE in lactating animals is more difficult than for growing animals in their linear phase, as dairy cows show stages of rapid catabolism post-calving, followed by anabolism of reserves until their next calving. Feed efficiency of 1.5 to 1.6 is a reasonable target for cows or herds between 150 to 200 days in milk (DIM). For cows being in milk for more than 250 days, a FE below 1.4 should be expected. For animal in the beginning of lactation the target is above 1.6; Yet a very low FE (below 1.2) in early lactation, could indicate health problems such as acidosis or, if the cow is in good health, a very poorly performing animal. Improving FE can also have positive environmental effects, such as helping support the reduction of methane production and protein losses. Maintaining a high FE is crucial for overall herd productivity. EFFECT OF PHYTOGENICS IN FEED EFFICIENCY Research with phytogenics has been shown to support the increase in milk production and improvements in milk quality in field trials, demonstrating its effectiveness in improving feed efficiency. The reGraphic 1. ECM effect with Phytogenics (kg/day)
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