 | Abstract 10Responses in milk yield from feeding grain and meat-and-bone meal to cows grazing tropical pastures.Davison,TM; Williams,-D; Orr,-WN; Lisle,-AT Queensland Department of Primary Industries, Kairi Research Station, Kairi, Qld 4872, Australia. Australian-Journal-of-Experimental-Agriculture. 1991, 31: 2, 159-163; 21 ref. In a 3 X 2 factorial design grazing Holstein-Friesian cows were given supplements of maize grain without or with meat-and-bone meal (MBM) at 3.0, 5.5 and 8.0 kg DM daily with 16 or 10% crude protein. Cows grazed nitrogen-fertilized tropical grass (Setaria sphacelata and Pennisetum clandestinum) and grass-legume pastures (Panicum maximum var. trichoglume and Neotonia wightii, and P. maximum and N. wightii). Milk yields over 300 days with feed supplements 3.0, 5.5 and 8.0 kg DM/day averaged 5435, 5605 and 5882 kg/cow, respectively. For milk yields over both 100 and 300 days, there was a linear response to grain supplement. This represented 0.22 kg milk/kg DM (P < 0.05) for the first 100 days, and 0.30 kg milk/kg DM (P=0.087) over the 300-day lactation. Cows given MBM lost less (P=0.068) liveweight in days 1-100 of lactation and gained more (P=0.054) between days 100 and 300 than cows without MBM. Milk yields across treatments for cows fed with and without MBM averaged 2143 and 2061 kg/cow (P > 0.05) for days 1-100, and 5668 and 5614 kg/cow (P > 0.05) for days 1-300 of lactation. This abstract relates to the following species:
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