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• W2968127464 abstract "Abstract Grazing dormant forage under low-input heifer development strategies typically exposes cattle to low-quality forage. Protein supplementation while grazing dormant range can enhance heifer growth and reproductive performance. We examined resource utilization of heifers and the effects of dormant season grazing on residual vegetation characteristics under two supplementation management strategies. Approximately 100 weaned composite heifer calves were randomly selected and placed into one of two supplementation treatments in each of 2 yr, one receiving a free access 62% crude protein self-fed concentrate and the other receiving a daily hand-fed 20% crude protein cake. Grazing occurred from December (2015 and 2016) through March (2016 and 2017). Thirty transects were randomly located within each pasture for measuring vegetation quality and structure before and after grazing. Daily space use and behavior was evaluated for 21 individuals within each treatment using global positioning system (GPS) collars and resource utilization functions. Heifers supplemented with concentrated protein spent more time grazing per day than heifers supplemented with cake (6.92 ± 0.18, 6.24 ± 0.17 h). Relative use by heifers in the cake treatment was negatively related to horizontal distance from the supplement delivery site early to midwinter ( β ¯ ˆ  = − 0.41 ± 0.16, − 0.53 ± 0.17). Both treatments selected grazing locations relative to standing biomass of perennial grasses ( β ¯ ˆ  = 0.0005 ± 0.00004) and crude protein ( β ¯ ˆ  = 0.12 ± 0.007). However, resource selection was highly variable among individuals for both supplementation treatments. We found no treatment effects on pre-post grazing differences in residual cover of litter, grass, forbs and shrubs (P > 0.24). However, the time period when grazing occurred had an effect on residual vegetation conditions (P" @default.
• W2968127464 created "2019-08-22" @default.
• W2968127464 creator A5002076843 @default.
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• W2968127464 date "2019-11-01" @default.
• W2968127464 modified "2023-10-17" @default.
• W2968127464 title "Dormant Season Grazing: Effect of Supplementation Strategies on Heifer Resource Utilization and Vegetation Use" @default.
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• W2968127464 doi "https://doi.org/10.1016/j.rama.2019.06.006" @default.
• W2968127464 hasPublicationYear "2019" @default.
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