Publication Date
1993
Description
Cutting and grazing experiments were conducted in a subtropical environment to determine whether a relationship existed between differences measured in ryegrass cultivars from cutting experiments and milk production differences under grazing. Differences in dry mauer (OM) production under cutting between the standard annual ryegrass for the subtropics (Grasslands Tama) and a cultivar selected for superior performance under subtropical conditions (Midmar) averaged 31 %, differences in feed on offer under grazing averaged 21 %, while milk production differences averaged 10% in a 2-year study. The results indicate that increases in OM yield measured in cutting experiments will be consistent wlth differences in milk production under grazing. Based on this confidence, cutting experiments have indicated that selections of Italian ryegrass· (Lolium multiforlium) with high spring yields and moderate to high levels of resistance to crown rust (Puccinia coronata) are most likely to produce the highest DM yields in this environment.
Citation
Lowe, K F.; Bowdler, T M.; Reason, G K.; and Moss, R J., "The Value of Adapted, Annual Ryegrasses for Subtropical Dairy Production" (2024). IGC Proceedings (1993-2023). 37.
https://uknowledge.uky.edu/igc/1993/session12/37
Included in
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The Value of Adapted, Annual Ryegrasses for Subtropical Dairy Production
Cutting and grazing experiments were conducted in a subtropical environment to determine whether a relationship existed between differences measured in ryegrass cultivars from cutting experiments and milk production differences under grazing. Differences in dry mauer (OM) production under cutting between the standard annual ryegrass for the subtropics (Grasslands Tama) and a cultivar selected for superior performance under subtropical conditions (Midmar) averaged 31 %, differences in feed on offer under grazing averaged 21 %, while milk production differences averaged 10% in a 2-year study. The results indicate that increases in OM yield measured in cutting experiments will be consistent wlth differences in milk production under grazing. Based on this confidence, cutting experiments have indicated that selections of Italian ryegrass· (Lolium multiforlium) with high spring yields and moderate to high levels of resistance to crown rust (Puccinia coronata) are most likely to produce the highest DM yields in this environment.
