Sustainable milk production using low concentrate input

摘要

The current experiment belongs to a series running in Europe as a part of the SOLID Project (Agreement no. 266367, http://www.solidairy.eu/) financed by EU FP-7. The general aim is to compare different cow genotypes to identify the degree of adaptation of different breeds to organic and low input systems. In Finland, the breeds were Holstein and Finnish Red. Cows were subjected to two different dietary energy levels: 11.5 MJ ME kg~(-1) DM~(-1) and 11.9 MJ ME kg~(-1) DM~(-1). The experiment lasts overthe whole lactation, and the preliminary results presented here cover the first 100 days in milk. The Finnish Red group had lower milk production (29.2 vs. 31.5 kg d~(-1)) and fewer claw disorders compared to the Holstein group during the first 100 daysin milk. Primiparous cows could not fully utilize the high dietary energy content at the beginning of lactation; their milk production was 23.5 kg and 24.0 kg d~(-1) for the low and high energy-level diets, respectively.