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Effects of ruminally protected choline on productivity of Angora goats

T. Shenkoru1, F. N. Owens2, R. Puchala1, and T. Sahlu1

1E (Kika) de la Garza Institute for Goat Research, Langston University, Langston, OK, and2Animal Science Department, Oklahoma State University, Stillwater

Twenty-five Angora wethers (29 ± 6 kg initial BW and > 1 yr of age) were used to evaluate effects of ruminally protected choline (PC) on BW gain and mohair production. Animals were randomly allocated to five treatments and had ad libitum access to 53% concentrate diet (oats based, 13% CP) for 90 d. Treatments were 1, 2, and 3 g/d of PC, 3 g/d of unprotected choline (UC), and no added choline (control). In situ ruminal disappearance of PC was 7%, whereas disappearance of UC at 2 h was complete. Total tract digestibility of PC was 56%. Dry matter intake, BW gain, and feed efficiency were similar among treatments (P > 0.10), although numerically BW gain was 7, 13, and 17% greater for diets with 1, 2, and 3 g/d of PC compared with the control diet (83, 88, 91, 71, and 78 g/d for 1, 2, and 3 g/d PC, 3 g/d UC, and control, respectively; SE 18.5). Mohair growth (monthly patch samples) was similar among treatments (P > 0.10). Numerical differences among treatments in BW gain warrant further investigation of potential effects of PC on productivity of Angora goats.


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