Abstract: The differences of plant diversity,community composition,number of different taxonomic groups of microorganism,and water content on and outside the fairy rings of Armillaria luteo-virens were investigated in Ebao village,Qilian county,Qinghai Province,from July,1997 to August,1998.The results showed that the vegetation community on fairy ring was composed differently from that outside of it,but both of them had the same dominant species.The species number and total plant cover on fairy ring were obviously higher than that outside the ring.In surface soil layer,the water content,available P and N content on fairy ring were significantly higher than that outside the ring,while there were no obvious difference in changeable Ca² and Mg² ,organic matter content and pH.Their trend was similar in deep soil layer except for water content.The number of bacteria,actinomyces,fungi and cellulose decomposer on fairy ring was obviously higher than those outside of it in surface soil layer,respectively,while there was no significant difference between them in deep soil layer.

Key words: Feeding-composting system, Recycling rate, Recoveries of N and P in organic manure