Abstract 220

Abu-Bakar,-C

Livestock Research Division, Malaysian Agricultural Research and Development Inst. (MARDI), 43400 Serdang, Selangor, Malaysia.

Advances in animal feeds and feeding in the tropics. Proceedings of the Tenth Annual Conference of the Malaysian Society of Animal Production, Genting Highlands, Pahang, Malaysia, April 2-4, 1987 [edited by Hutagalung, R.I.; Chen, C.P.; Wan Mohamed, W.E.; Law, A.T.; Sivarajasingam, S.]. 1987, 165-169; 10 ref. Serdang, Malaysia; Malaysian Society of Animal Production.

In a 3 X 3 X 2 feeding trial with 36 lactating Friesian cows whole cottonseed (19% ether extract) was given to replace maize and soyabean meal in diets at 0, 15 or 30% of dietary DM. Three sources of roughage (maize silage, lucerne haylage and cottonseed hulls) and 2 concentrations of calcium (0.69 and 1.29% of dietary DM) were given. Roughage was given at 40% of DM in all diets. Across roughages and calcium concentrations, dietary DM intake decreased linearly with increasing cottonseed. Milk yield and percentages of milk fat and protein were least with 30% cottonseed. Calcium in the form of limestone was ineffective in correcting the problem of reduced milk fat.