GROWTH OF DIPTEROCARPUS ALATUS ROXB. SEEDLINGS INOCULATED WITH ECTOMYCORRHIZAL FUNGI

Abstract

Growth of Dipterocarpus alatus Roxb. seedlings grown in sterilized soil noninoculated and inoculated with chopped fruit bodies of 3 ectomycorrhizal fungi, i.e. Russula aeruginea Lindbl., R. albida Peck, and R. sanguinea Fr. was investigated under nursery condition. The experimental design was completely randomized design with 4 treatments and 5 replications. Height and diameter at root collar of the seedlings were measured monthly. Shoot-, root- and total dry weights and percentages of ectomycorrhizal root dry weight were determined when the seedlings were 7 months old. Results of the experiment revealed that heights, diameters at root collar, shoot-, root- and total dry weights of the seedlings in the treatments were significantly different. The seedlings inoculated with R. aeruginea showed the highest values of all mentioned growth parameters, followed by the seedlings inoculated with R. sanguinea, R. albida and noninoculated controls, respectively. However, there were no significant differences in shoot to root dry weight ratios and percentages of ectomycorrhizal root dry weights in the treatments. R. aeruginea and R. sanguinea were more suitable than R. albida in forming ectomycorrhizae with D. alatus seedlings.