The energetic change of decaying substance in decaying process of corn straw wasinvestigated under the conditions of field ecosystem using oxygen bomb calonimeter method.The influence of different components of decaying substance on its energetic was explored.The results show that the energetic change of decaying substance in decaying process of cornstraw brought out such two stages as the fluctuating-rolling stage and the stage, which tendingto be stable, The decaying process was, on the whole, a process o...