Study about the suitable level of technology of forest utilization by evaluation of resource use and environmental impact

从增加森林资源和保持森林稳定的角度，研究了森林道路建设和森林经营对森林的干扰。森林资源的采伐（包括砍伐立木）导致森林生物量的减少。这会导致二氧化碳固定能力的下降。据推测，随着植物的生长，这种能力将在三年内恢复。在两个地点设置了一些温度计，用于森林试验和控制。两个地点都记录了温度的变化。在记录温度的同时，试验点进行了减薄操作。减薄后，测试现场温度升高。试验点与对照点的差异随着年份的增加而减小。稀释率为30%后，试验区最高温度与对照区相差3 ~ 5度。在平均温度上，差异为0.5到1度。这种差异自变薄以来已经保持了一年半。据推测，大约需要三年的时间，温差才会消失。大约100立方米/公顷的生物量从森林中移除，但树木在三年内增长约30立方米。从立木中收获的生物量几乎与原木相同。有效利用这些生物质可以产生比森林资源减少所造成的能量损失更多的能量。木质生物质利用的新技术和新框架使木质生物质减少二氧化碳排放、生物乙醇以及木质生物质的其他利用成为可能。试验点与对照点的差异随着年份的增加而减小。稀释率为30%后，试验区最高温度与对照区相差3 ~ 5度。在平均温度上，差异为0.5到1度。这种差异在减薄1年半后依然存在。假定消除温度差大约需要三年的时间。大约100立方米/公顷的生物量从森林中移除，但树木在三年内增长约30立方米。立木产生的生物量几乎与原木相同。有效利用这些生物质可以产生比森林资源减少所造成的能量损失更多的能量。木质生物质利用的新技术和新框架使木质生物质减少二氧化碳排放、生物乙醇以及木质生物质的其他利用成为可能。少

The disturbance in forest by construction of forest road and forest operation was studied from the point of view of increasing of forest resource and keeping constancy. Harvesting of forest resource which includes cutting standing trees leads decrease of biomass in forest. And that causes decline in ability of carbon dioxide fixation. It is assumed that the ability are restored in three years by growth of plants.Some thermometers were set on two sites, for test and control in forest. Change of temperature had been recorded in both site. While recording the temperature, the test site had thinning operation. After thinning, the temperature is raised in test site. The difference of test site and control site had decreased with the years.After thinning, which rate is 30%, the maximum temperature in test site was differ 3 to 5 degrees from control site. In average temperature, the difference was 0.5 to 1 degrees. This different had remained one and half year since thinning. It is assumed th … More at it takes about three years extinction of the difference of temperature. About 100m3/ha biomass are removed from forest, but tree grows about 30m3 in three years.The volume of harvested biomass from standing tree is almost same as wood logs. Efficient use of that biomass can make more energy than lost energy caused by decreasing of forest resource. New technology and new framework of utilization of woody biomass enable reduction of C02 emission, bio-ethanol from woody biomass, and other utilization of woody biomass. The difference of test site and control site had decreased with the years.After thinning, which rate is 30%, the maximum temperature in test site was differ 3 to 5 degrees from control site. In average temperature, the difference was 0.5 to 1 degrees. This different remained after one and half year since thinning. It is assumed that it takes about three years to remove the difference of temperature. About 100m3/ha biomass are removed from forest, but tree grows about 30m3 in three years.The amount of biomass from standing tree is almost same as wood logs. Efficient use of that biomass can make more energy than lost energy caused by decreasing of forest resource. New technology and new framework of utilization of woody biomass enable reduction of C02 emission, bio-ethanol from woody biomass, and other utilization of woody biomass. Less