液體飼料醱酵產生有機酸之變化

The Effect of Temperature Change on Organic Acid Production in Fermented Liquid Feeds

游義德(I-Te Yu) ； 顏宏達(Houng-Ta Yen) ； 陳潔如(Chieh-Ju Chen) ； 林志勳(Jyh-Shiun Lin)

《台灣農學會報》 10卷2期 (2009/04) Pp. 77-85

https://doi.org/10.6730/JAAT.200904_10(2).0001

摘要

本試驗目的在瞭解不同溫度下液體飼料醱酵產生有機酸的效果。利用乳酸桿菌和枯草桿菌菌種(10^5 CFU mL^(-1))添加於液體飼料醱酵會降低其pH值和產生有機酸。保育料或肉豬料在35˚C醱酵24小時，其pH值降至4以下。反之，25˚C醱酵則要48小時才能將pH值降至4以下。保育料液體醱酵的乳酸產生量在35˚C高於25˚C，肉豬料液體醱酵在24小時35˚C的乳酸產生量高於25˚C之外，其餘醱酵時間點在25˚C比35˚C要高。保育料和肉豬料液體醱酵醋酸的產生模式類似，醱酵初期是在35˚C較高，醱酵後期是在25˚C較高。保育料或肉豬料液體醱酵在35˚C的丁酸量生產比25˚C要高。乳酸和醋酸與丁酸的產酸模式不一樣可能是保育料與肉豬料所含原料不同所致。

關鍵字

生菌劑 ； 液體醱酵 ； 有機酸

並列摘要

The purpose of the experiment was to investigate the effect of organic acid production during liquid feed fermentation under different temperatures. Liquid feed fermentation reduced pH value and produced organic acids when Lactobacillus and Bacillus (10^5 CFU mL(-1)) were added to liquid feed. pH value was below 4 around 48 h during liquid feed fermentation at 25˚C, while pH value was below 4 around 24 h at 35˚C. The amount of lactic acid production for liquid starter feed fermented at 35˚C was higher than that at 25˚C, however, the amount of lactic acid production for liquid grower feed fermented at 25˚C was higher than that at 35˚C, except at 24 h when it was higher for 35˚C than 25˚C. The productive model of acetic acid was similar in liquid starter and grower feed fermentation; it was higher for 35˚C at the initial stage of fermentation, but it was higher for 25˚C at a later stage of fermentation. The amount of butyric acid production for liquid starter and grower feed fermented at 35˚C was higher than that at 25˚C. The different productive models between lactic acid and acetic acid/butyric acid may be due to the different feed composition of starter and grower diets.

並列關鍵字

Probiotic ； Liquid fermentation ； Organic acid