| To explore mineralization decomposition process, components' change characteristics of organic carbon of oil shale and the role of environmental factors can provide adequate scientific basis for the feasibility and the value of oil shale in matrix application.With oil shale for culture matrix (or Medium) , we studied organic carbon mineralization characteristics of the dynamic changes in the interior control conditions during the cultivation.We also discussed the influences of organic carbon mineralization under different temperature, water and salt washing conditions.The result showed that during the 60 d cultivation of the oil shale matrix, temperature increased by 10 degree Centigrade and it had made the total mineralization increased by 2%～28% (100%FC) , 2%～22% (80%FC) and 1%～15% (60%FC) in the unwashed-salt matrix respectively and 2%～17% (100%FC) , 1%～5% (80%FC) and 7%～14% (60%FC) in the washed-salt matrix.Through regression analysis of the active organic matter content of the matrix, it was found that in the two kinds of tested oil shale matrix the active organic carbon content had positive correlation with both temperature and water;in unwashed-salt matrix, the active organic carbon content had no significant correlation with temperature or water, but there were significant correlation on washed-salt matrix (P=0.0214) .The dynamics of oil shale matrix organic carbon mineralization preferably followed the first-order kinetics, and the most constant of the unwashed-salt matrix decomposition rate constant was 1.2×10-3/d, while the washed-salt matrix was between 0.5×10-3/d～0.7×10-3/d.During the 60-day period of oil shale cultivation experiment, the organic matter released slowly and the active organic matter content increased as time went on.It was proved that the matrix played an imperative function in supplying nutrients continuously to plant and maintaining roots physiological activity in substrate culture. |