Shelf-life extension of repealed bean sprouts by formic acid and its nutrient composition for dairy cow feed and rumen <i>in situ</i> digestion characteristics

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  • モヤシ残さのギ酸添加による変敗防止，飼料成分と乳牛における第一胃内での分解特性
  • モヤシザンサ ノ ギサン テンカ ニ ヨル ヘンパイ ボウシ,シリョウ セイブン ト ニュウギュウ ニ オケル ダイイチ イ ナイ デ ノ ブンカイ トクセイ

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Abstract

Three experiments were conducted to evaluate nutrient composition and rumen digestion characteristics of bean sprouts which were repealed from bean sprout manufacturing company for dairy cow feed. In experiment 1, nutrient compositions of five kinds of bean sprouts : raw, crushed, dewatered (gravity, once screw pressed, and twice screw pressed), were evaluated. The second experiment was to demonstrate usage of 76% formic acid (without lactobacillus) in dewatered bean sprout for extending shelf-life and last experiment was for determining rumen digestion characteristics of bean sprouts. Two dairy cows were used each in situ experiment for determining rumen digestion characteristics. Moisture contents of raw, crushed, gravity, once screw pressed, and twice screw pressed bean sprouts were 94.7%, 89.0%, 83.9%, 74.4%, and 65.8%, respectively. Other nutrient compositions of bean sprouts were approximately similar to alfalfa hay in dry matter (DM) basis. Addition of formic acid (0.25% of FM of bean sprouts) for three days had no negative effects on bean sprouts. In situ experiment resulted that after 4h incubation in rumen, DM disappearance rate of three dewatered bean sprouts in rumen were significantly lower (P<0.05) comparing to timothy hay. The effective degradability of bean sprouts was 43-51% (assuming rate of passage of 0.05/h). These results indicate that dewatered bean sprout is beneficial feedstuff for dairy cow.

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