Effects of nitrogen fertilization on growth and ectomycorrhizal formation ofQuercus alba, Q. rubra, Q. falcata, andQ. falcatavar.pagodifolia

摘要

Quercus alba, Q. rubra, Q. falcata, andQ. falcatavarietypagodifoliaseedlings were grown for 105 or 110 days in containers in a greenhouse in a medium with and without vegetative or basidiospore inoculum of the ectomycorrhizal fungiPisolithus tinctoriusandScleroderma auranteum. At 15 days after planting acorns, nitrogen in the form of sodium nitrate or ammonium chloride was added to each container at the rates of 0.0 or 100ensp;mg nitrogen per seedling. Growth of allQuercusseedlings that were not fertilized was significantly less than seedlings fertilized with nitrate or ammonium nitrogen (100ensp;mgensp;N). Ectomycorrhizal development of allQuercusseedlings that were not fertilized or fertilized with sodim nitrate (100ensp;mgensp;N) was significantly less than seedlings fertilized with ammonium chloride (100ensp;mgensp;N). Ectomycorrhizal development of oak species varied with different mycorrhizal inocula.