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林业科学 ›› 1999, Vol. 35 ›› Issue (5): 17-21.

• 论文及研究报告 • 上一篇    下一篇

雷竹林冠层特性与叶片的空间分布

周国模,金爱武   

  1. 浙江林学院林业科学研究所 临安 311300
  • 收稿日期:1999-03-29 出版日期:1999-09-25 发布日期:1999-09-25
  • 基金资助:
    加拿大国际发展研究中心(IDRC);国际林业研究中心(CIFOR)

CHARACTERISTICS OF THE CANOPY AND SPATIAL DISTRIBUTION OF LEAVES IN PHY LLOSTACHYS PRAECOX C.D.CHU.ET.C.S.CHAO CV.PREVEYNALIS PLANTATIONS

Guomo Zhou,Aiwu Jin   

  1. Research Institute of Forest Science, Zhejiang Forestry College Lin' an 311300
  • Received:1999-03-29 Online:1999-09-25 Published:1999-09-25

摘要:

研究了雷竹林的冠层特性和叶片的空间分布规律。结果表明,随着雷竹竹冠部位上升,分枝角度逐渐变小,而立竹密度变大,分枝角度略偏大;竹株不同留枝数量、胸径和林分不同立竹密度对叶量分布有较大影响,随着留枝盘数的增加,单株竹株的全叶重显著增加,在留枝盘数为15 ~ 16档时,每株叶量最大;随胸径增大,全株叶重增大,在胸径为3.7cm左右时叶量增幅最小,而后趋于平缓;立竹密度的增加,导致林冠叶量重心逐渐上移,立竹密度为2.56~ 2.92×104株·hm-2,林冠上层叶重比例达到63.13 %,林冠下层自然落叶现象明显。

关键词: 雷竹, 冠层特性, 空间分布

Abstract:

A study on characteristics of the canopy and spatial distribution of leaves in P.praecox C.D. Chu.et.C.S.Chao cv.preveynalis shows that the higher the canopy, the smaller the angle between culm and branches while the angle between culm and branches is positively correlated with the density of a stand.The spatial distribution of leaves is greatly affected by the number of branches each bamboo has, DBH of the culm and the stand density.The total leaf weight of each bamboo is increased with the number of rounds of branches, with leaf quantity reaching maximum when there are 15 ~ 16 rounds of branches.Asimilar trend is found between DBH and the total leaf weight each bamboo has, with the latter being maximum when DBH is about 3.7cm, and no much changes are found in leaf weight when DBH is more than 3.7cm.Increasing the stand density leads to that the center of canopy gravity moves upwards.When a stand has a density of 25600 ~ 29200 bamboo per hectare, leaves in upper layer account for 63.13 % of the total weight of leaves, with much litter found on the ground.

Key words: Phy llostachys praecox C.D.Chu.et.C.S.Chao cv.preveynalis, Canopy characteristic, Spatial distribution