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林业科学 ›› 2000, Vol. 36 ›› Issue (zk): 137-142.doi: 10.11707/j.1001-7488.2000S121

• 研究简报 • 上一篇    下一篇

连栽桉树人工林生长特性和树冠结构特征

余雪标 徐大平 龙腾 莫晓勇   

  1. 农业部热带作物栽培生理学重点开放实验室,儋州571737;中国林业科学研究院热带林业研究所,龙洞510520;广东省雷州林业局,遂溪524348
  • 收稿日期:1998-08-18 修回日期:1900-01-01 出版日期:2001-01-25 发布日期:2001-01-25

STUDIES ON THE GROWTH CHARACTERISTICS AND THE CROWN STRUCTURE OF EUCALYPTUS PLANTATION WITH THE DIFFERENT CONTINUOUS-PLANTING ROTATION

Yu Xuebiao,Xu Daping,Long Teng,Mo Xiaoyong   

  1. Key Laboratory of Physiology of Tropical Crops, Ministry of Agriculture, P.R. China Danzhou 571737;Research Institute of Tropical Forestry, CAF Longdong 510520;Leizhou Forestry Bureau Suixi 524348
  • Received:1998-08-18 Revised:1900-01-01 Online:2001-01-25 Published:2001-01-25

关键词: 连栽桉树人工林, 生长特性, 树冠结构特征

Abstract:

The research results showed that the mean height, DBH, the individual volume and the growing stock of 4.5-year-old Eucalyptus plantation decreased with the Continuous Planting Rotation(CPR)increasing. The mean tree height of the second, the third and the fourth rotation decreased by 7.4%, 7.9% and 20.0% respectively compared with the first rotation; the mean DBH decreased by 8.4%, 15.9% and 25.8% respectively; the individual volume decreased by 20.4%,32.8% and 50.4% respectively; and the growing stock decreased by 20.9%,38.7% and 50.5%; The changes of height, DBH, the individual volume and the growing stock with CPR increasing may be simulated by linear, parabola and exponential model: (1) y=a+bx; (2)y=a+bx+cx2; (3)y=axb. The corwn length and volume decreased with the CPR increasing, which indicated that the more CPR increased, the worse the growth poentials became, and in which the leaf biomass of the second, the third and the fourth rotation decreased by 10.2%, 44.7% and 71.0% respectively compared with the first planting rotation. Their changes with rotations accorded with the linear model. There was a significat multiple linear regression relationship between the parameter of crown structure and the standing growth index.

Key words: Continuous planting, Eucalyptus plantation, Growth characteristics, Crown structure