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1983年瑞典国家能源管理局在70公顷的农耕地上进行林业能源作物试验,经过三年的工作,获得良好效果,提出了柳林3—4年轮伐的经营方案,要点是:1、林地必须水肥充足;2、经营生物产量高、抗性与萌芽力强的树种;3、适当密植,但需成行种植,以利于机械作业:4、抑制杂草生长;5、根据土质施足肥料;6、三四年为一生产周期,伐后利用伐桩萌芽更新。培育柳林的造林密度是每公顷2万株,每年每公顷收获10—15吨物质。伐后将梢头削成碎段制成木炭,全部作业均采用机械作业。瑞典电力部南方
In 1983, the Swedish National Energy Administration conducted a pilot test of forestry energy crops on 70 hectares of cultivated land. After three years of work, it achieved good results and put forward a management plan for the rotation of Liulin 3-4 years. The main points are: 1, Water and fertilizer adequate; 2, operating high biological yield, resistance and germination of strong tree species; 3, appropriate close planting, but need to line planting, in favor of mechanical operations: 4, weed growth inhibition; , Three or four years for a production cycle, cutting after the use of sprouting sprout update. Plantation density of Liulin is 20,000 per hectare and 10-15 tons of material are harvested per hectare per year. After the cut will be cut into pieces made of charcoal, all operations are used mechanical work. Swedish Ministry of Power South