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在林业发达国家,树木生物量主要用作制浆造纸工业和人造板生产的原料,以及当作燃料之用。美国林学家培育的杨树速生品种,可获得比天然林多3—4倍的生物量。森林中每公顷有生物量183吨(不含根系)。每年采
In developed countries, tree biomass is mainly used as raw material for the pulp and paper industry and for the production of wood-based panels, and as a fuel. Poplar cultivars cultivated by American foresters can obtain 3-4 times more biomass than natural forests. There are 183 tons of biomass per hectare (excluding root system) in the forest. Mining every year