02435naa a2200265 a 450000100080000000500110000800800410001902400490006010000180010924501140012726000090024152016610025065000110191165000320192265000130195465000130196765000230198065000100200365000090201365300240202270000200204670000170206670000190208377300670210221049572019-01-29       1981    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.2527/jas1981.532479x2DOI1 aMARTIN, L. C.  aEffect of level and form of supplemental energy and nitrogen on utilization of low quality roughage by sheep.  c1981  aAbstract: Three voluntary intake and metabolism studies were conducted to compare various levels and forms of nonprotein N (urea and biuret) and energy (corn and sugarcane molasses) as supllements for sheep consuming a low quality forage. In Exp. 1, sheep consumed hay containing 3.9% crude protein plus a dialy supplement of 0, 5 or 10 g of urea N in combination with 80 or 160 g of molasses. A control treatment group was fed no supplemental energy or N. sheep given 160 g of mollasses daily consumed less (P&lt.05) hay than control animals (480 vs 597 g). Increasing N levels improved (P&lt.05) cellulose digestiblity, organic matter digestibility and N retention. Blood urea N (BUN) levels increased with greater supplemental N levels. In Exp. 2, sheep consumed hay containing 3.4% crude protein plus a daily supplement of 0, 5 or 10 g of biuret N in combination with 0, 80 or 160 g of molasses. Cellulose digestibility was decreased (P&lt.05) by molasses supplementation, while organic matter digestibility was increased (P&lt.05) with increasing levels of biuret N. In Exp. 3, sheep fed hay containing 3.6% crude protein were supplied with either no supplemental N or 7 g of N daily from urea or biuret in combination with 60 g of dry energy supplement (50% corn meal, 25% corn starch, 25% sucrose; 4.8% crude protein) or 80 g of molasses. Cellulose and organic matter digestibilities were improved (P&lt.05) when diets were supplemented with urea or biuret. Supplemental energy improved (P&lt.05) organic matter digestibility and N retention. Prefeeding BUN values for sheep consuming urea were lower (P&lt.05) than those for sheep consuming biuret.  aBiuret  aDietary mineral supplements  aMolasses  aNitrogen  aRuminant nutrition  aSheep  aUrea  aLow quality forages1 aAMMERMAN, C. B.1 aHENRY, P. R.1 aLOGGINS, P. E.  tJournal of Animal Sciencegv. 53, n. 2, p. 479-488, Aug. 1981.