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Intake, digestibility, and nitrogen retention by sheep supplemented with warm-season legume hays or soybean meal.
J Anim Sci 2009; 87(9):2891-8JA

Abstract

The increasing cost of feed supplements necessitates evaluation of alternatives for ruminant livestock grazing poor quality warm-season grasses. This study determined how supplementing bahiagrass hay (Paspalum notatum Flügge cv. Pensacola) with soybean [Glycine max (L.) Merr.] meal or warm-season legume hays affected intake, digestibility, and N utilization by lambs. Dorper x Katadhin crossbred lambs (30.6 +/- 5.5 kg; n = 42) were fed bahiagrass hay (73.8% NDF, 8.1% CP) for ad libitum intake and supplemented with nothing (control), soybean meal, or hays of annual peanut [Arachis hypogaea (L.) cv. Florida MDR98; 46.2% NDF, 14.7% CP], cowpea [Vigna unguiculata (L.) Walp. cv. Iron clay; 62.2% NDF, 11.7% CP], perennial peanut (Arachis glabrata Benth. cv. Florigraze; 43.3% NDF, 15.2% CP), pigeonpea [Cajanus cajan (L.) Millsp. cv. GA-2; 78.6% NDF, 12.2% CP], or soybean (cv. Pioneer 97B52; 59.0% NDF, 13.5% CP). Legume hays were supplemented at 50% of total diet DM, and soybean meal was supplemented at a level (4.25% of diet DM) that matched the average dietary CP content (10.8%) of the legume hay-supplemented diets. The cowpea, pigeonpea, and soybean were harvested at respective maturities that maximized DM yield and nutritive value, and the peanuts were first cuttings. Diets were fed to 6 lambs per treatment for 2 consecutive 21-d periods. Supplementation with hays of annual and perennial peanut, cowpea, and soybean increased (P < 0.01) DMI vs. control, but apparent DM digestibility was only increased (P = 0.03) by supplementation with annual or perennial peanut hay. Compared with the control, N intake, digestibility, and retention were increased (P < 0.01) by supplementation with legume hay or soybean meal. Responses were greatest when annual or perennial peanut hays were fed. Ruminal ammonia concentration was increased (P < 0.01) by all legume hay supplements vs. the control. Microbial N synthesis and ruminally degraded OM were increased (P = 0.03) by perennial and annual peanut hay supplementation, but efficiency of microbial synthesis was not different (P = 0.52) among diets. Unlike other supplements, annual and perennial peanut hays increased DM and N intake and digestibility and improved microbial N synthesis; therefore, they were the best supplements for the bahiagrass hay under the conditions of this study.

Authors+Show Affiliations

Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19502513

Citation

Foster, J L., et al. "Intake, Digestibility, and Nitrogen Retention By Sheep Supplemented With Warm-season Legume Hays or Soybean Meal." Journal of Animal Science, vol. 87, no. 9, 2009, pp. 2891-8.
Foster JL, Adesogan AT, Carter JN, et al. Intake, digestibility, and nitrogen retention by sheep supplemented with warm-season legume hays or soybean meal. J Anim Sci. 2009;87(9):2891-8.
Foster, J. L., Adesogan, A. T., Carter, J. N., Blount, A. R., Myer, R. O., & Phatak, S. C. (2009). Intake, digestibility, and nitrogen retention by sheep supplemented with warm-season legume hays or soybean meal. Journal of Animal Science, 87(9), pp. 2891-8. doi:10.2527/jas.2008-1637.
Foster JL, et al. Intake, Digestibility, and Nitrogen Retention By Sheep Supplemented With Warm-season Legume Hays or Soybean Meal. J Anim Sci. 2009;87(9):2891-8. PubMed PMID: 19502513.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Intake, digestibility, and nitrogen retention by sheep supplemented with warm-season legume hays or soybean meal. AU - Foster,J L, AU - Adesogan,A T, AU - Carter,J N, AU - Blount,A R, AU - Myer,R O, AU - Phatak,S C, Y1 - 2009/06/05/ PY - 2009/6/9/entrez PY - 2009/6/9/pubmed PY - 2009/12/16/medline SP - 2891 EP - 8 JF - Journal of animal science JO - J. Anim. Sci. VL - 87 IS - 9 N2 - The increasing cost of feed supplements necessitates evaluation of alternatives for ruminant livestock grazing poor quality warm-season grasses. This study determined how supplementing bahiagrass hay (Paspalum notatum Flügge cv. Pensacola) with soybean [Glycine max (L.) Merr.] meal or warm-season legume hays affected intake, digestibility, and N utilization by lambs. Dorper x Katadhin crossbred lambs (30.6 +/- 5.5 kg; n = 42) were fed bahiagrass hay (73.8% NDF, 8.1% CP) for ad libitum intake and supplemented with nothing (control), soybean meal, or hays of annual peanut [Arachis hypogaea (L.) cv. Florida MDR98; 46.2% NDF, 14.7% CP], cowpea [Vigna unguiculata (L.) Walp. cv. Iron clay; 62.2% NDF, 11.7% CP], perennial peanut (Arachis glabrata Benth. cv. Florigraze; 43.3% NDF, 15.2% CP), pigeonpea [Cajanus cajan (L.) Millsp. cv. GA-2; 78.6% NDF, 12.2% CP], or soybean (cv. Pioneer 97B52; 59.0% NDF, 13.5% CP). Legume hays were supplemented at 50% of total diet DM, and soybean meal was supplemented at a level (4.25% of diet DM) that matched the average dietary CP content (10.8%) of the legume hay-supplemented diets. The cowpea, pigeonpea, and soybean were harvested at respective maturities that maximized DM yield and nutritive value, and the peanuts were first cuttings. Diets were fed to 6 lambs per treatment for 2 consecutive 21-d periods. Supplementation with hays of annual and perennial peanut, cowpea, and soybean increased (P < 0.01) DMI vs. control, but apparent DM digestibility was only increased (P = 0.03) by supplementation with annual or perennial peanut hay. Compared with the control, N intake, digestibility, and retention were increased (P < 0.01) by supplementation with legume hay or soybean meal. Responses were greatest when annual or perennial peanut hays were fed. Ruminal ammonia concentration was increased (P < 0.01) by all legume hay supplements vs. the control. Microbial N synthesis and ruminally degraded OM were increased (P = 0.03) by perennial and annual peanut hay supplementation, but efficiency of microbial synthesis was not different (P = 0.52) among diets. Unlike other supplements, annual and perennial peanut hays increased DM and N intake and digestibility and improved microbial N synthesis; therefore, they were the best supplements for the bahiagrass hay under the conditions of this study. SN - 1525-3163 UR - https://www.unboundmedicine.com/medline/citation/19502513/Intake_digestibility_and_nitrogen_retention_by_sheep_supplemented_with_warm_season_legume_hays_or_soybean_meal_ L2 - https://academic.oup.com/jas/article-lookup/doi/10.2527/jas.2008-1637 DB - PRIME DP - Unbound Medicine ER -