Genera, Clones and Varieties of Energy Wood
Clone means the entire range of plants having the same genetic material. Cloning is realized thrugh vegetative propagation, i.e. using shoot parts of the mother tree.
In Middle Europe, we usually consider poplars and willows, the latter to be used, first of all, for water-rich soils and for cooler or highly located sites. However, willow is more endangered regarding browsing by game.
Attention: You shouldn’t plant only one clone on larger areas! Instead, you should prefer a locally adapted variety of clone choices or natural material from the region, which has been further developed by breeding. Willows are rather suitable for fast, 2-5-year rotations and provide a yield of 7-15 t of dry mass per hectare annually. Robinia (acacia) has a higher heating value, newly-harvested only about 35 % of water (while poplars and willows about 55 %), good flammability, and grows relatively well in even dry, sandy and hot locations. No larger areas planted with the only clone!
You should prefer a locally adapted variety of clone choices or natural material from the region, which has been further developed by breeding;
Willos are an almost 100% planting and regenerating success; rotation period of max. 4 years; high browsing by roe deer; yield about 8 t/ha/a;
Robinia: high heat value; good flammability; low demands for the soil quality, tolerant of drought;\r\n\r\n