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板栗密植园树冠结构特征与光能分布规律的研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
1997年02期
Page:
27-31
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
THE CHARACTERISTICS OF CANOPY STRUCTURE AND PATTERNS OF LIGHT DISTRIBUTION IN HIGH DENSITY PLANTING ORCHARD OF CHESTNUT
Article ID:
1000-2006(1997)02-0027-05
Author(s):
Peng Fangren Huang Baolong
College of Forest Resources and Environment Nanjing Forestry University Nanjing 210037
Keywords:
Castanea mollissima Canopy structure Light utilizationHigh density planting orchard
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1997.02.006
Document Code:
A
Abstract:
Using gird system and layer methods, the characteristics of canopy structure and the patterns of light distribution in the 8yearold trees in four different high densities(4 m×3 m,3 m×25 m,3 m×2 m,3 m×15 m) orchards of chestnut(Castanea mollissima) were studied in Xin Yi county, Jiangsu province. The results showed that the diameter of canopy reduced, the layer of green leave raised,the thickness of canopy decreased and the volume of canopy reduced with the density increased; The light distribution in the different layers of the canopy varied with the changes of the natural sunlight. The mean daily light transmissivity and the daily changes of the light intensity were reduced from the external to the internal part of the canopy. The light distribution in the canopy and the efficience of its utilization were obviously affected by the structure of canopy and the leaf area index(LAI). The best density that has high efficience light usage should be maintained with 834~1334 trees.gha-1, with the thickness of canopy more than 2.0 m and an effective leaf area index of appoximately 5~6.

References

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Last Update: 1900-01-01