A short‐term comparison of the performance of four grassland‐based systems of milk production for autumn‐calving dairy cows

Eighty winter-calving dairy cows of mixed parity were managed in four grassland-based systems of milk production (F-F, F-C, C-F and C-C) over a full lactation (year 1) and during the winter period of the subsequent lactation (year 2). During the winter periods cows on systems F-F and F-C were offered silages of high feeding value, supplemented with 6AE 0k g d )1 of concentrate [crude protein (CP), 307 g kg )1 dry matter (DM)]