Effect of Sodium Hydroxide or Ammonia Treatment on Digestion and Rumen Degradation of Alfalfa Silage in Goats

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  • アルファルファサイレージの消化性およびルーメン内分解性に及ぼす水酸化ナトリウム処理あるいはアンモニア処理の影響
  • アルファルファサイレージの消化性およびルーメン内分解性に及ぼす水酸化ナトリウム処理あるいはアンモニア処理の影響〔英文〕
  • アルファルファ サイレージ ノ ショウカセイ オヨビ ルーメンナイ ブンカイセ

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Abstract

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 3×3 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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