Amino Acid Supplementation of Hydrocarbon Yeast Chick Diet

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  • 雛における炭化水素酵母へのアミノ酸添加の効果について
  • ヒナ ニ オケル タンカスイソ コウボ エ ノ アミノサン テンカ ノ コウカ ニ ツイテ

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Abstract

In this country hydrocarbon yeast is expected to play an important role as a source of protein for poultry feed in the future. It can be produced on a large scale and made from n-paraffin used as a primary growth substrate.<br>Two lots of hydrocarbon yeast for these experiments contained 8.0 and 9.6% nitrogen respectively. The amino acid composion of the samples tested are low in methionine, arginine and phenylalanine, and high in lysine.<br>The purpose of this experiments was conducted to determine which essential amino acid are most limiting in a ration containing 20% hydrocarbon yeast protein.<br>In Experiment I methionine was found to be most limiting amino acid in hydrocarbon chick ration followed by arginine and then phenylalanine. The phenylalanine level appeared to be submarginal.<br>In Experiment II the unsupplemented control diet gave 57% of the gain of the amino acid supplemented control and the feed conversion was considerably higher. The addition of arginine resulted in significantly better gain than the unsupplemented control and same feed conversion. Arginine and methionine added together showed no improvement in weight over methionine addition alone.<br>Soybean meal diet resulted in a significantly better gain than hydrocarbon yeast diet supplemented with amino acid mixture.

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