Feed requirements of growing and fattening beef cattle: New Zealand experimental data compared with National Research Council (U.S.A.) and Agricultural Research Council (U.K.) feeding standards
Open Access
- 1 August 1975
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Agricultural Research
- Vol. 18 (3) , 295-301
- https://doi.org/10.1080/00288233.1975.10423647
Abstract
Metabolisable energy (ME) intakes derived from 91 grazing and 59 stall-feeding experiments with growing and fattening beef cattle were compared with ME intakes predicted from average live weights and rates of live-weight gain on a group basis using the ARC (1965) and NRC (1970) feeding standards. The NRC feeding standard predicted ME intakes more accurately than that of the ARC. All NRC and ARC estimates, when corrected using regression analysis, were of similar accuracy. Regression equations were derived from the New Zealand trial results relating ME intake to average live weight and rate of live-weight gain. The predicted feed requirements for grazing cattle were: maintenaqce 0.59 MJ ME/kg LW0.75 or 0.143 MJ ME/kg LW and 40 MJ ME/kg LWG. Corresponding estimates for stall-fed animals were 0.53, 0.135, and 37. The associated prediction errors were similar to those obtained using the corrected ARC and NRC standards.Keywords
This publication has 2 references indexed in Scilit:
- The California Net Energy System: Theory and ApplicationJournal of Animal Science, 1973
- A System for Expressing Net Energy Requirements and Feed Values for Growing and Finishing Beef CattleJournal of Animal Science, 1968