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PROTEIN SUPPLEMENTATION OF AMMONIATED ROUGHAGES
Abstract
Protein supplementation and nitrogen utilization of ammoniated roughages by ruminants was investigated. Rate of particulate passage was quadratically increased (P = .09) in wethers due to level to ammoniation of corn cobs. Factorial arrangements of treatments were used in two lamb and two steer trails where main effects were level of ammoniation of corn cobs and level of supplemental protein from a blood meal-corn gluten meal mixutre (BM-CGM). In a lamb digestion trial, the main effect of ammoniation quadratically increased (P < .02) dry matter intake (DMI) and linearly decreased (P < .02) dry matter digestibility (DMD) at ad libitum intake, however, a cubic main effect (P < .01) was noted for DMD at restricted intake (350 g DMI). The main effect of BM-CGM linearly (P < .01) increased DMI and DMD at ad libitum intake and quadratically increased (P < .001) DMD at restricted intake. A quadratic decrease (P < .06) in urinary nitrogen excretion of wethers was noted due to the main effect of ammoniation. Linear BM-CGM x ammonia interactions were noted for fecal nitrogen excretion and nitrogen retention. In abomasally fistulated steers, rumen and total tract organic matter (OM) digestion coefficients were quadratically increased (P < .05) and a linear increase in dietary nitrogen was noted due to the main effect of ammonia. The main effect of BM-CGM increased (P = .08) post ruminal OM digestibility, non-ammonia nitrogen and dietary nitrogen flow. Quadratic BM-CGM x ammonia interactions were noted for fluid flow, total nitrogen flow, total amino acid flow and ammonia nitrogen flow. A linear BM-CGM x ammonia interaction was noted for bacteial nitrogen flow. Rate of passage was unaffected by either main effect in ruminally fistulated steers. Two winter growth trials were conducted where ammoniation of wheat straw significantly increased steer gain (ADG) and feed intake (FI). In trial 1, the main effect of alfalfa haylage level significantly increased only FI. In trial 2, ADG of steers supplemented with soybean meal was greater than either the blood meal or blood meal-urea supplemented steers. A significant ammonia x supplement interaction was noted in trial 2 for G/F.
Subject Area
Livestock
Recommended Citation
NELSON, MARK LOGE, "PROTEIN SUPPLEMENTATION OF AMMONIATED ROUGHAGES" (1982). ETD collection for University of Nebraska-Lincoln. AAI8306493.
https://digitalcommons.unl.edu/dissertations/AAI8306493