Relationship between mycorrhizal dependence and competitive ability of two tallgrass prairie grasses

摘要: The impact of mycorrhizal symbiosis on growth Andropogon gerardii (big bluestem) and Koeleria pyranidata (junegrass) was compared. 98% dependent the symbiosis, whereas K. displayed less than 0.02% dependence. Mycorrhizal fungus inoculation resulted in 50 times larger A. plants but did not alter pyranidata. When competing pairs, dominated when present it present. Dry weight altered, whether grown alone or with pyranidata, grew well only absence competition failed to grow appreciably if Without inoculation, had no deleterious effects P fertilization substituted for better at low levels wa...