论文部分内容阅读
脂松是北美东北部地区优良造林树种,具有生长快、适应性强、材质优良的特点。文章对东北林业大学尖砬沟实验林场2004年营造的脂松人工林进行一次早春调查,旨在了解脂松生长与立地条件的关系。依据坡位不同把立地划分为三个类型,上坡位、中坡位、下坡位,每个类型设3块临时标准地(20×20 m),其中中坡位又分为缓坡和凹地。调查幼树各项生长指标,包括苗高、地径、2004、2005年高生长,苗木的存活率。每个临时标准地取代表性幼树3株,测量幼树不同部分的生物量,根系各级的生物量。调查结果证明脂松生长不适宜在含水率过高或过低的地方生长。
Pine is a good afforestation tree species in northeastern North America, with fast growth, adaptability, excellent material characteristics. In this paper, an early spring investigation was conducted on the Pinus tabulaeformis plantation constructed in Jiangyougou Experimental Forest Farm of Northeast Forestry University in 2004 to understand the relationship between the growth of Pinus tabulaeformis and site conditions. Based on different slope positions, the site is divided into three types: uphill, mid-slope and downhill. Three types of temporary standards (20 × 20 m) are set for each type. The middle slope is divided into gentle slope and concave slope . Investigate the growth of young trees indicators, including height, diameter, 2004, 2005, high growth, survival rate of seedlings. Each tentative standard to replace the representative young tree 3, measured in different parts of the sapling biomass, root biomass at all levels. The results of the survey showed that the growth of Pinus thunbergii is not suitable for growth in areas where the water content is too high or too low.