Our Research Nursery

Research at FORRU-CMU's Doi Suthep Nursery has discovered how to grow saplings of framework tree species ready for planting at the beginning of the rainy season

The success of any forest restoration project depends on the provision of top quality planting stock. Therefore, FORRU-CMU has conducted numerous experiments to develop horticultural practices that optimise seedling vigour and health (Blakesley et al., 2000).

Germination Trials

Germination trials have been carried out on more than 460 native forest tree species (Blakesley et al., 2000). Some species germinate easily, whilst others have proved difficult. So various treatments to break dormancy have been tested, including scarification, heat treatments and soaking in water and acid (Kopachon, 1995Singpetch, 2001;Vongkamjan, 2003).

Containers a
nd Media

Experiments have also been conducted to determine the best container types and media for seedling growth and survival (Zangkum, 1998;Jitlam, 2001). Various methods of fertilliser application and pruning have also been tested.

Cuttings and Wildlings

For species, difficult to grow from seed, vegetative propagation from cuttings (Vongkamjan, 2003) and the nurturing of seedlings dug up from the forest (Kuarak, 2002) have also been investigated. 

Production Schedules

Different tree species produce seeds at different times of the year and seedling growth rates also vary among species, yet all species must grow big enough for planting by the beginning of the rainy season. Therefore, one of the main aims of research in the nursery is to identify treatment combinations that produce high quality planting stock within one year of seed collection. This has led to the development of production schedules for many tree species, which can be used by nursery managers to formulate effective nursery production programmes for mixed crops of framework tree species (Kuarak et al., 2000Elliott et al., 2002Blakesley et al., 2000).