Distribution of endomycorrhizae in Jatropha rhizosphere in Panzhihua City
攀枝花市麻疯树根际土壤内生菌根菌分布特征

Abstract: Objective] Concentration of endomycorrhizae spores in Jatropha rhizosphere were detected er to obtain the distribution characteristics of endomycorrhizae, for effective technical support in seedling, cultivation and afforesttation of Jatropha. Methods] Concentration of endomycorrhizae spores in Jatropha rhizosphere were studied by random sampling method in Renhe borough of Panzhihua City. Then 20 samples of soil and root mixture from 20 sites were collected to measure the concentration of endomycorrhizae under macroscope. We analyzed soil moisture and organic matter on the basis of The Forestry Industry Standard issued in 1999. Results] Rhizosphere soil samples from 1025m to 1500m altitude in natural Jatropha contained abundant Arbuscular mycorrhizas (AM) fungi spore. The highest number of AM fungi spore was 236/g dry soil, the lowest was 9/g dry soil, the average was 80/g dry soil. Soil moisture samples correlated positively with the number of AM fungi spores. Similarly, organic matter of soil correlated positively with the number of AM fungi spores. Conclusion] AM fungi spores could be detected in the rhizosphere soil of natural Jatropha, with high concentration and asymmetrical distribution. The spore concentration was inversely correlated with the altitude whereas positively correlated with moisture and organic matter in the soil.