What is Nepalese Alder?
Nepalese alder wood (alnus nepalensis) is a deciduous tree native to Nepal. It has a perennial life span, growing quickly in two to three years to a size of 30m, and 60cm in diameter. Its appearance is a light tan to reddish brown bark, which darkens and reddens as the tree ages (Wood Database, 2015). Positives of this product include environmental benefits through nitrogen fixation, limiting soil erosion and production of oxygen. Nepalese alder wood produces beautiful furniture, unique tea boxes and can be used for construction. Negatives of this product include durability of the wood, shipping, and high potential for pests and diseases (Agroforestry, 2009). Nepalese alder wood has potential to be a good source of income for hillside farmers in Nepal.
Growing Conditions
Nepalese alder grows well in elevations up to 2800m, which is ideal for hillside farmers in Nepal, and is often found near rivers or on the outskirts of villages (Flora et al, 2015). Nepalese alder wood grows in optimal temperatures of 15°C to a maximum of 28°C. Soil pH (acidity of the soil) needs to be between 5.5 and 7 on the pH scale, soil depth must be deep greater than 150cm, and the soil should be well drained. Nepalese alder wood grows ideally with precipitation ranging from 100cm to 200cm (Ecocrop, 2015.) If this product is to be used for fuel wood, it should be planted closer together, although normal plantation spacing for alnus nepalensis is 2.5mx2.5m (Agroforestry, 2009).