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采伐木材一般都留伐根,伐后挖根又要花费额外的人力和物力。许多国家的林业工作者早就注意到连根伐木法,但这种方法过去主要用于开辟农田、水库和建设道路、村庄等目的,近几年才愈来愈多地应用到林业生产上。连根伐木对于林业的意义,首先在于提高树木根干部分优质材的出材量,并使树根成为林产工业的原料,从而更充分地利用森林资源。据估算,连根伐可使森林单位面积出材量增加18—25%。其次,连根伐的采伐迹地土壤裸露,有利于森林更新,据苏联的试验观察,无论采用天然更新或人工播种,
Harvesting timber is generally left after cutting roots, rooting and cutting have to spend extra manpower and material resources. Forestry workers in many countries have long been aware of the root-harvesting law, but in the past this method was mainly used for the purpose of opening up farmland, reservoirs and building roads and villages. It has only been applied more and more to forestry production in recent years. The significance of ratooning for forestry lies first in increasing the amount of timber produced from the top quality of tree roots and in making the tree roots the raw material for the forest products industry to make fuller use of forest resources. It is estimated that even root cutting can increase the amount of timber produced per unit area by 18-25%. Secondly, the bare soil of the cutting trail with root cutting is conducive to the renewal of the forest. According to the Soviet experimental observation, no matter using natural renewal or artificial sowing,