Effects of VA-mycorrhizal fungi on growth and nutrient uptake of cuttings of Rosa multiflora in two container media with three levels of fertilizer application

by Fred T. Davies, Jr.

Rooted cuttings of Rosa multiflora ‘Brooks 56’ were grown in a medium of 1 mineral soil; 1 sand (v/v) or 4 bark: 1 sand (v/v) inoculated with the VA-mycorrhizal (VAM) fungi Glomus mosseae (Nicol. And Gerd. ) Gerd. And Trappe and G. fasciculatum (Thaxt. Sensu Gerd. )Gerd. And Trappe or left as noninoculated controls. The slow release fertilizer osmocote was applied at rates of either 0, 1.2, or 4.2 kg/m3 (18N-6P-12K) and incorporated into the container medium. After 180 days plants were evaluated for growth, development and chemical leaf analysis. Greatest growth responses occurred after the highest fertilizer application of 4.2 kg/m3, and the poorest one after 0 kg/m3. Combination bark: sand medium was superior to mineral soil:sand medium for growth of mycorrhizal plants. At 1.2 kg/m3, VAM plants compared to nonmycorrhizal plants in bark:sand medium had greater effect on growth parameters. At the highest fertilizer application of 4.2 kg/m3, greatest growth responses occurred with VAM plants in bark:sand medium. Mycorrhizal plants compared to nonmycorrhizal plants in bark: sand medium had greater K and Zn uptake at 0 kg/m3, and greater K, Ca, S, Mn, and Zn uptake at 1.2 kg/m3.

Plant and Soil 104, 31-35 (1987)