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- Title
Long-Term Forage and Cow-Calf Relationships for Bermudagrass Overseeded with Arrowleaf Clover or Annual Ryegrass Managed at Different Stocking Rates.
- Authors
Rouquette, Francis M.; Smith, Gerald R.; Santen, Edzard van
- Abstract
Bermudagrass [Cynodon dactylon (L.) Pers.] pastures are often overseeded with annual ryegrass (Lolium multiflorum Lam.) and/or clovers to extend grazing. The bermudagrass pastures were stocked at three levels of forage mass to quantify cow and calf average daily gain (ADG, gain ha-1) and its relationship with mass and allowance (forage dry matter/animal body weight [DM:BW]). From 2002 through 2013, 'Coastal' and common bermudagrass pastures were overseeded with either 'Apache' arrowleaf clover (Trifolium vesiculosum Savi.) without N fertilization or annual ryegrass plus N. Calf ADG was greater (P < 0.001) on arrowleaf clover and ryegrass from February to mid-June (spring) compared with Coastal and common bermudagrass from mid-June to late September (summer). Calf ADG was similar for bermudagrass pastures in spring, but different (P < 0.001) at all three stocking levels for low (1.42 kg d-1), medium (1.22 kg d-1), or high (0.90 kg d-1) stocking rates. Cow ADG in spring was greater (P < 0.01) for ryegrass (0.41 kg d-1) than for arrowleaf clover (0.22 kg d-1), and at all three stocking levels. In summer, calf ADG was affected by stocking (P < 0.001) at low (1.05 kg d-1), medium (0.81 kg d-1), and high (0.58 kg d-1) stocking rates. Cow ADG in summer varied by stocking level (P < 0.01), bermudagrass pasture (P < 0.04), and stocking level × bermudagrass pasture interaction (P < 0.04). Calf ADG was optimum at 2000 to 2500 kg ha-1 mass in spring, and 3000 to 3500 kg ha-1 mass in summer. Optimum allowance for calves was 1.2 to 1.5 (DM:BW ) in spring and 1.5 to 2.0 in summer. A two-phase linear relationship best fit mass and allowance with cow and calf ADG for the overall 11 yr.
- Subjects
FORAGE; BERMUDA grass
- Publication
Crop Science, 2018, Vol 58, Issue 3, p1426
- ISSN
0011-183X
- Publication type
Article
- DOI
10.2135/cropsci2017.12.0736