论文部分内容阅读
湿地松、火炬松原产美国东南部,具有生长迅速,干材通直,冠形壮丽,松脂产量高等特点,是世界上优良速生用材树种之一。为适应社会主义建设对木材日益增长的需要,要求造林达到早出材、多出材、出好材的目的。根据我县地理位置、气温、雨量条件,都接近原产地的特点。因此,我们把它列入引进的优良树种之一。但引种点在垂直分布上,要比原产地高一千多公尺,也比我国目前大面积引种地区高五、六百公尺,所以我县一千一百至一千三百米的山岚中,大面积的引种能否成功,对丰富我省中海拨地区造林树种具有重要意义。
Pinus elliottii and Pinus taeda native to the southeastern United States have the characteristics of rapid growth, straight stem, magnificent crown and high yield of turpentine. It is one of the world’s finest growing timber species. In order to meet the growing needs of the socialist construction of timber, require afforestation to achieve early timber, more timber, a good purpose. According to my county location, temperature, rainfall conditions, are close to the origin of the characteristics. Therefore, we include it in one of the fine tree species introduced. However, the introduction point in the vertical distribution, higher than the origin of more than 1,000 meters, but also larger than the current introduction of large areas in our region five or six hundred meters, so I County, 1-100 Shan Shan Whether the large-scale introduction can succeed or not is of great significance for enriching afforestation species in the middle reaches of China.