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- W2280495861 abstract "The effect of excess dietary protein supplementation on ovarian function of beef cows consuming low quality forage was investigated. In a pair of studies, non-pregnant, non-lactating beef cows were supplemented with excess dietary protein along with ad libitum access to chopped corn stalks. In the first study, the objective was to determine the effect of feeding excess metabolizable protein (MP) from feedstuffs differing in rumen degradability on ovarian parameters. Cows were supplemented with either a moderately undegradable protein (corn gluten meal; CGM) or low-undegradable protein (soybean meal; SBM) based supplement, formulated to supply 150% of NRC MP requirements for 58 days (d). Cows supplemented with CGM experienced greater dominant follicle growth post-dominance, larger follicles at spontaneous luteolysis, shorter duration of proestrus, and larger ovulatory follicles than SBM-treated cows. Peak estradiol production and corpus luteum volume did not differ due to treatment, but within the CGM treatment, cows tended to have lesser progesterone concentrations 7 d postestrus compared to cows consuming the SBM supplement. Circulating plasma urea N (PUN) concentrations were elevated after supplementation in both treatment groups; yet no differences between treatments existed at ovulation. Total circulating plasma amino acid (AA) concentrations were not different between treatments after supplementation, but individual AA concentrations were shifted based on degradability of the protein supplement. In order to determine if enhanced ovarian parameters observed in the first study was mediated by amount of undegradable protein, a second study was conducted offering" @default.
- W2280495861 created "2016-06-24" @default.
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- W2280495861 date "2018-08-10" @default.
- W2280495861 modified "2023-09-27" @default.
- W2280495861 title "Effects of excess dietary protein on ovarian function of beef cows" @default.
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- W2280495861 doi "https://doi.org/10.31274/etd-180810-4210" @default.
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