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杉木是我国最重要的速生用材造林树种,杉木林在我国人工林的发展中一直居于领先地位。位于杉木分布北缘地带的京山县虎爪山林场,杉木人工林面积已达1.5万亩,占全场总面积的1/3,蓄积量占1/2;根据规划设计,杉木林总面积将突破2万亩,蓄积量将达到20万m~3。现以该场1989年的森林经营方案调查材料为主要依据,对杉木人工林进行投入产出效果分析。一、杉木人工林的生产工艺及费用投入按照现行营林作业规程以及该场的林业生产实际和杉木生长规律,将杉木人工林的生产工艺划分为五个阶段。各阶段内的费用投入以亩为单位计算,各项工序的劳动定额依照该场现行标准统计。 1.植苗前阶段包括造林规划设计;种苗生产;林
Cunninghamia lanceolata is the most important species of afforestation in China. Cunninghamia lanceolata has been the leader in the development of plantation in China. Located in the Husaga Mountain Forest Farm in Jingshan County of the northern margin of the fir distribution, the plantation area of Chinese fir has reached 15,000 mu, accounting for one third of the total area and 1/2 of the total volume. According to the planning and design, Break 20,000 mu, volume will reach 200,000 m ~ 3. Now the site of the 1989 forest management plan survey materials as the main basis for the Cunninghamia plantation input-output effect analysis. First, the Cunninghamia plantation production technology and cost inputs According to the current operating rules of the forest and the field of forestry production practices and Chinese fir growth rules, the Cunninghamia lanceolata plantation production process is divided into five stages. The investment in each stage is calculated in units of mu, and the labor quotas of various processes are calculated according to the current standard of the field. 1. Pre-planting stage includes afforestation planning and design; seedling production; forest