| Popis: |
Twenty-four multiparous Holstein-Friesian dairy cows in mid lactation were used in a 33 Latin square changeover experiment with three 4-week periods to investigate the effect of altering the ratios of red clover (RC) silage and maize silage in the forage component of their diet. Ratios (in the dry matter (DM)) were: RC10, 0.1 RC:0.9 maize; RC50, 0.5 RC:0.5 maize; RC90, 0.9 RC:0.1 maize. All cows received ad libitum access to their allocated forage with 4 kg of a standard concentrate per day. Whole-body N partitioning and whole-tract diet digestibility measurements were carried out using a subset of cows (n=9). Results are presented in order of RC10, RC50 and RC90 respectively. Feed DM intakes (19.6, 20.5, 19.5 kg DM d-1, s.e.d. 0.32, P |
