Publication Date
1993
Description
Cutting trials at 4 sites throughout New Zealand over 2 years with perennial ryegrass (Lolium perenne L) cultivars showed that Bmbassy (B) produeed similar annual dry matter (DM) yields to Supernui (S) and Yatsyn (Y). However, B grew 10% more DM in January-August, but 5% less DM in September-December. The economic value of these diffecent patterns of growth for milk production was assessed using a computer model. The model constrained pasture covers within specified limits by removing excess feed for conservation and adding additional feed as supplements during periods of deficit. Stocking rates needed to maintain the system in equilibrium were estimated. The pattern of growth associated with B could sustain a 4-691, higher stocking rate than S or Y. This resulted ln Cll.tra milkfat production with a .S-791, increase in gross margin, The value of feed available for grazing in autumn and winter is 3 times greater than that used for conservation in late spring and summer.
Citation
Brookes, I M.; McRae, A F.; Gray, D I.; and Cameron, N, "Economics of Milk Production from Perennial Ryegrass Cultivars with Different Seasonal Growth Patterns" (2024). IGC Proceedings (1993-2023). 18.
https://uknowledge.uky.edu/igc/1993/session37/18
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Economics of Milk Production from Perennial Ryegrass Cultivars with Different Seasonal Growth Patterns
Cutting trials at 4 sites throughout New Zealand over 2 years with perennial ryegrass (Lolium perenne L) cultivars showed that Bmbassy (B) produeed similar annual dry matter (DM) yields to Supernui (S) and Yatsyn (Y). However, B grew 10% more DM in January-August, but 5% less DM in September-December. The economic value of these diffecent patterns of growth for milk production was assessed using a computer model. The model constrained pasture covers within specified limits by removing excess feed for conservation and adding additional feed as supplements during periods of deficit. Stocking rates needed to maintain the system in equilibrium were estimated. The pattern of growth associated with B could sustain a 4-691, higher stocking rate than S or Y. This resulted ln Cll.tra milkfat production with a .S-791, increase in gross margin, The value of feed available for grazing in autumn and winter is 3 times greater than that used for conservation in late spring and summer.
