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Effect of sodium hydroxide or ammonia treatment on digestion and rumen degradation of alfalfa silage in goats



Effect of sodium hydroxide or ammonia treatment on digestion and rumen degradation of alfalfa silage in goats



Nippon Sochi Gakkai-Shi 39(4): 437-445



Three rumen cannulated goats were used to investigate the effect of NaOH and NH-3 treatment (2.74% DM) at ensiling on digestion, nitrogen utilization and in situ protein degradation of low moisture alfalfa silage. Wilted alfalfa was sprayed with water (control), NaOH or NH-3 solution, and fed to goats after 6 months storage in a 3 times 3 Latin square design. Both alkali treatments increased the pH value, NH-3-N and butyric acid of the silage, but NH-3-treated silage preserved as much amino acids as control silage. The two alkali treatments could not improve digestibilities of fibrous components (NDF, ADF and cellulose), and NaOH addition significantly reduced the digestibility of crude protein. The NaOH treatment decreased the rate of N degradation in the rumen, while solubility and potential degradability was not affected by the treatment. The NH-3 addition increased ruminal soluble nitrogen in the silage, but rate of N degradation was similar to that of control silage. These results suggest that NaOH treatment would make protein less susceptible to microbial degradation in the rumen despite of deteriorating the fermentation quality of the silage.

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Accession: 002604527

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