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杉梢(PDF)

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

Issue:
1989年04期
Page:
80-84
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
A STUDY ON THE SPATIAL DISTRIBUTION PATTERNS AND SAMPLING TECHNIQUE OF POLYCHROSIS CUNNINGHAMIACOLA
Article ID:
1000-2006(1989)04-0080-05
Author(s):
Wen Shaosheng Cheng Guoshun Thang Zaifu Gao Gangfeng (Sanming City Forestry Commitee Fujian Province)Gong Qijing & Zhang Hemao
Sha County Forestry Commitee, Fujian Province
Keywords:
Polychrosis cunninghamiacola Spatial distribution patterns! Sampling techniques
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1989.04.014
Document Code:
A
Abstract:
The present paper deals with the spatial distribution patterns and sampling technique of Polychrosis cunninghamiacola which were carried out in Sha county and the suburbs of Sanming city, Fujian province from 1984 to 1985. Frequency chech methods and several aggregation indices were used to determine the spatial distribution patterns. Most larvae and pupae were of aggregated patterns. The optimal sampling sizes were determined. Five sampling methods were compared and the ones most suitable for the investigations of larvae and pupae were suggested. The equations based on the relationships between percentage of the trees with larvae or pupae and the numbers of larvae or pupae per 100 trees were built up, they can be applied to practical investigations.

References

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Last Update: 1900-01-01