J. Anim Sci.
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J. Anim Sci. 1981. 53:1592-1600.
© 1981 American Society of Animal Science
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Ammonia Treatment of Corn Plant Residues: Digestibilities and Growth Rates1

J. A. Paterson2, T. J. Klopfenstein and R. A. Britton

University of Nebraska3, Lincoln 68583

Abstract

Two lamb digestion trials and two steer growth trials were conducted to evaluate NH3 treatment of cornstalks and cobs. In digestion trial 1, cornstalks were treated to contain 0, 2, 3 or 4 g NH3/100 g dry matter (DM); DM intake of lambs increased (P<.05) with increasing levels of NH3 (from 398 to 997 g). DM digestibility (DMD) increased (P<.05) from 36.8 to 47.0% with 2% NH3 but did not increase further with 3 or 4% NH3. In digestion trial 2, 3% NH3-treated cornstalks produced higher (P<.01) DMD, DM intake and cell wall digestibility than untreated cornstalks. No positive associative effects on DMD were observed from the addition of 50% alfalfa to treated stalks, but DM intake showed positive associative effects (P<.01). Steers fed stalklage harvested shortly after the harvest of high moisture grain gained more weight per day (P<.05) but were not more efficient (P>.10) than steers fed stalklage harvested 1 month after grain harvest. NH3 treatment of stalklage did not improve rate or efficiency of gain over that otained with the corresponding untreated stalklage (P>.10). Steers fed 3% NH3 -treated corn cobs gained .72 kg/day, compared with .39 kg/day for steers fed untreated cobs. DM intake increased (P<.05) from 4.22 kg/day for steers fed untreated cobs to 7.17 kg/day for steers fed 3% NH3 cobs.

Footnotes

1 Published with the approval of the Director as Paper No. 6102, Journal Ser. Nebraska Agr. Exp Sta.

2 Present address: Anim. Sci. Dept., Univ. of Missouri, Columbia 65211.

3 Dept. of Anim. Sci.






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Copyright © 1981 by the American Society of Animal Science.