草原蘑菇圈的土壤-植物系统研究

在内蒙古锡林郭勒草原，比较研究了蒙古口蘑形成的蘑菇圈各环带的植物生长状况和土壤生态因子的变化。结果表明，绿草环上的植物体内营养元素和叶绿素的含量明显增加，其地上部分植物生物量显著高于正常草区，产生增产效应；枯草环上的植物生长则受到抑制。蘑菇圈土植物的区系组成有所变化。蘑菇圈上土壤养分特别是速效态的N和P含量有显著增加。蒙古口蘑菌丝体生长对土壤理化性质产生影响并产生明显的土壤生物学效应。

Soil-vegetation system surround the fairy ring in steppe

In the steppe of Inner Mongolia, China, a comparative study on soil-vegetation system of different zones surrounding the fairy ring fomed by a kind mushroom fungus- Tricholoma mongolium (Imai.)was carried out. These zones included the inside, green zone, scorched zone and outside of the fairy ring. The results showed that plant biomass aboveground in green zone was increassed than in normal vegetation of outside ring, and content of nutrient elements and chorophyll in Leymus chinensis was also increased in the green zone. But plant growth was restrained in the scorched zone. Plant specties composition was changed on the fairy ring. Soil nutrient, especialy available N and P in different zones of fairy ring had a significant variance. Effect of T.mongolium mycelia growth on physical and chemicd characteristics and biological activities in soil caused the ecological phenomena of fairy ring. There was a close relationship between beneficial microbe and T.mongolium fungus.