摘要
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40cm,最大者达90cm.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.
A study on growth regularity and development rhythm of Pinus koraiensis reveals that there are three phases in its height growth per year: The beginning time is the early days to second ten days of May, then gets fast in May 20th to June 5th , the last stage was at June 5th to June 20th, or August 5th to (September) 10th for parts of (Pinus) (koraiensis) in height growth secondly. It has a close relation between height growth and temperatures summation in each phase. To a 15-yr-old tree, height growth could be divided transplanting (seedling) stage (for these of 3-(year)-old and within 4 years planted), accelerating growth stage (within 5-8 years planted) and fast growing stage (within 9-12 years planted). In the later, mean current annual increment in tree (height) could reach to 40 cm and the biggest was up to 90 cm. Whichever of periodic increment about 5 year and total mean (increment) within 15 years, the trend is North Asia area is bigger than South Asia area and Middle Asia is smaller than (South) Asia, but annual increment in current 2～3 years, it appeared that of South Asia was bigger than North Asia and (Middle) Asia was smaller than North Asia.
出处
《吉林林业科技》
2005年第4期34-36,40,共4页
Journal of Jilin Forestry Science and Technology
