Microbial Inoculants for Sustainable Forests

Autor: E. A. Pedersen, Dong Ning He, Douglas Covert, M. S. Reddy, L. M. Funk
Rok vydání: 1997
Předmět:
Zdroj: Journal of Sustainable Forestry. 5:293-306
ISSN: 1540-756X
1054-9811
DOI: 10.1300/j091v05n01_08
Popis: Fungal root pathogens are widespread and may cause substantial seedling losses in conifer nurseries. Furthermore, poor seedling survival and growth on reforestation sites results in reduced forest regeneration. Use of microbial inoculants for disease control and plant growth promotion has become an important endeavour. A microbial culture collection of 500 strains was assessed for biological control of fungal root pathogens and/or plant growth promotion of conifer seedlings. Seven of these strains showed significant suppres-sive effects on various soil-bome fungal pathogens. On Douglas fir, two strains, RAL3 and 64-3, reduced disease caused by Fusariumby. 7-42% in repeated growth room assays. The same strains significantly increased healthy stand of white spruce seedlings inoculated with Fusariumand Pythiumin a conifer nursery, and increased the survival of bare-root white spruce seedlings planted on a reforestation site by 19-23%. Both strains also significantly increased new root and total plan...
Databáze: OpenAIRE