<;P>;PROBLEM TO BE SOLVED: To provide a microorganism preparation for feed, which comprises a new probiotic microorganism excellent in intestinal immobilizability and harmful microorganism proliferation-inhibiting ability in livestock and suitable for preparing the fermented feed and improving the quality, and to provide a method for simply producing a fermented liquid, TMR fermented feed, a silage, or the like, having high intestinal function-regulating effects in the livestock. <;P>;SOLUTION: This microorganism preparation for feed comprises a probiotic microorganism Lactobacillus plantarum LQ80 strain (NITE P-133) and/or Bacillus subtilis LQ13 strain (NITE P-132). The method for producing the fermented liquid or the TMR fermented feed is characterized by adding the microorganism preparation for feed to organic wastes and fermenting the organic wastes. The method for producing the silage is characterized by adding the microorganism preparation for feed to silage material grass and fermenting the silage material grass. <;P>;COPYRIGHT: (C)2007,JPO&INPIT