The Mycorrhizal and Nodulation Status of Container-Grown Trees and Shrubs Reared in Commercial Nurseries

1990

4 Abb., 15 Lit. Ang.

Unselbständiges Werk

9716

200088692

To guide in deciding whether artificial inoculation of container-grown woody seedlings used for reclamatin purposes in Alberta might be beneficial, a survey was made of seven nurseries to determine the symbiotic status of plants ready for outplanting. Eight species of woody shrubs were rarely vesicuar-arbuscular mycorrhizal if less than 1 year old and were erratically mcorrhizal after 1 to 2 years nursery residence time. Actinohizal shrubs (Elaeagnus commutata Bernh. ex Rydb. and Shepherdia spp.) did not become nodulated in the 1st year, and planting stock generally lacked N2-fixinf ability. The mycorrhizal status of pines (Pinus banksiana Lamb. and Pinus contorta Dougl.) and white spruce (Picea glauca (Moench) Voss) seedlings ranged from mycorrhizal-free to complete mycorrhization. A majority of the mycorrhizae were formed by Thelephora terrestris Ehrh.:Fr.,E-strain (Complexipes), and Mycelium radicis atrovirens Melin. Amphinema byssoides (Fr.) J. Erikss. formed a large proportion of the mycorrhizae on white spruce, which were held in nurseries for over 1 year. A stipitate polypore, Coltricia sp., is reported as a mycorrhizal associate of nursery stock for the first time.