论文部分内容阅读
红松在1 a中高生长主要分为三个阶段,开始生长期(5月初~5月20日),生长速生期(5月20日~6月5日),生长末期(6月5日~6月20日),部分红松二次高生长出现在8月5日~9月10日。各期高生长与各期积温关系密切。15 a红松高生长分为缓苗期(3 a生苗造林后4 a内)、加快期(造林后5~8a内)、速生期(造林后9~12 a)。速生期内,树高连年生长量平均达40 cm,最大者达90 cm。树高近5 a定期生长量及15 a总平均生长量均是北亚区大于南亚区,南亚区大于中亚区,但是,近3 a、2 a、当年生长量都是南亚区大于北亚区、北亚区大于中亚区。
The growth of Pinus koraiensis in 1 year is mainly divided into three stages: the beginning of growth period (early May to May 20), the fast growing period (May 20 to June 5) and the late growth stage (June 5 to June 5) June 20), part of Korean pine growth appears in the August 5 to September 10. Each period of high growth and temperature accumulation are closely related. The growth of Pinus koraiensis in 15 a was divided into three stages: rejuvenation stage (within 4 days after 3 years of seedling afforestation), accelerating stage (within 5 ~ 8 years after afforestation) and fast growing stage (9-12 days after afforestation). In fast-growing period, the annual growth of tree height averaged 40 cm, the largest of 90 cm. The average growth of tree height in the past 5 years and total average growth in 15 years were both greater in North Asia than in South Asia and greater in South Asia than in Central Asia. However, in the past 3 years and 2 years, District, North Asia is greater than Central Asia.