| Plant could not be recovered in several decades after the rare earth mine field destroyed seriously in the exploitation process. This study used the pot experiments, by planting the Paspalum conjugatum Berg in the pot, with adding water, major elements, organic matters, garden soil and chicken manure in the rare earth mine soil, respectively, then compared the effects of different influencing factors on the P. conjugatum physicochemical properties, enzyme activities and soil bacteria diversity. The results showed that, the content of free proline in organic matter group was 4.75 滋g/g, which was the highest among these experiment groups. The watering treatment had the highest chlorophyll contents, and the chlorophyll a and b were 8.75 滋g/g and 1.82 滋g/g, respectively. The soluble protein contents of control group and major element group were 926.09 滋g/g and 953.73 滋g/g, higher than those of other four groups. And the soluble sugar contents were non-significant in each group. The POD, CAT and SOD enzyme activites of P. conjugatum leaves were promoted by rare earth mine soil stress, which indicated that the soil added the water, fertility and organic matter affected the enzyme activities. We analyzed the total bacterial and SRAP in each group, found that the soil of chicken manure groupcontented 9.96伊106 CFU/g total bacterial, which was the highest among these groups, and the highest bacterial diversity was in garden soil group. The results indicated that the factors like water, fertility and organic matter affected the plant growth in rare earth mine field. |
