Stand spatial structure for an uneven-aged <em>Cunninghamia lanceolata</em> ecological forest

CAO Xiaoyu; LI Jiping; FENG Yao; ZHANG Caicai; FANG Xiaona

doi:10.11833/j.issn.2095-0756.2015.01.012

Volume 32 Issue 1

Jan. 2015

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CAO Xiaoyu, LI Jiping, FENG Yao, ZHANG Caicai, FANG Xiaona. Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest[J]. Journal of Zhejiang A&F University, 2015, 32(1): 84-91. doi: 10.11833/j.issn.2095-0756.2015.01.012

Citation:

CAO Xiaoyu, LI Jiping, FENG Yao, ZHANG Caicai, FANG Xiaona. Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest[J]. Journal of Zhejiang A&F University, 2015, 32(1): 84-91. doi: 10.11833/j.issn.2095-0756.2015.01.012

Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest

doi: 10.11833/j.issn.2095-0756.2015.01.012

1.
School of Forestry, Central South University of Forestry & Technology, Changsha 410004, Hunan, China

Received Date: 2014-04-29
Rev Recd Date: 2014-08-22
Publish Date: 2015-02-20

Abstract

To optimize the spatial structure of a Cunninghamia lanceolata ecological forest and use of its ecological, economic, and cultural functions, nine permanent sample plots（20 m 30 m） at the Fushou Forest Farm in Hunan Province were analyzed for variation in spatial structure of uneven age-group stands using three spatial structure indexes: the mingling index, the neighborhood comparison, and the uniform angle index. Results showed an average mingling degree for juveniles of 0.19 which belonged to the transitional type between zero and weak mingling. The average degree of mingling for medium （0.09） and mature （0.04） trees was close to zero mingling. The average neighborhood comparison for stand DBH was juvenile （0.51）, medium （0.52）, and mature trees （0.52） which were close to the moderate state. The average stand uniform angle indexes were juvenile （0.37）, medium （0.35）, and mature （0.34） belonging to the transitional types of uniform and random distributions. Overall for the C. lanceolata stands, mingling showed that the ecological forest rating was low, and the stability of the stand structure was weak; the neighborhood comparison indicated that the number of trees in diameter classes was roughly equal; and the uniform angle index revealed poor horizontal distribution patterns in juvenile, medium, and mature stands. ［Ch, 4 fig. 4 tab. 14 ref.］
- forest management,
- Cunninghamia lanceolata,
- ecological forest,
- spatial structure

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest

1. School of Forestry, Central South University of Forestry & Technology, Changsha 410004, Hunan, China

Received Date: 2014-04-29

Rev Recd Date: 2014-08-22

Publish Date: 2015-02-20

Key words:

Abstract: To optimize the spatial structure of a Cunninghamia lanceolata ecological forest and use of its ecological, economic, and cultural functions, nine permanent sample plots（20 m 30 m） at the Fushou Forest Farm in Hunan Province were analyzed for variation in spatial structure of uneven age-group stands using three spatial structure indexes: the mingling index, the neighborhood comparison, and the uniform angle index. Results showed an average mingling degree for juveniles of 0.19 which belonged to the transitional type between zero and weak mingling. The average degree of mingling for medium （0.09） and mature （0.04） trees was close to zero mingling. The average neighborhood comparison for stand DBH was juvenile （0.51）, medium （0.52）, and mature trees （0.52） which were close to the moderate state. The average stand uniform angle indexes were juvenile （0.37）, medium （0.35）, and mature （0.34） belonging to the transitional types of uniform and random distributions. Overall for the C. lanceolata stands, mingling showed that the ecological forest rating was low, and the stability of the stand structure was weak; the neighborhood comparison indicated that the number of trees in diameter classes was roughly equal; and the uniform angle index revealed poor horizontal distribution patterns in juvenile, medium, and mature stands. ［Ch, 4 fig. 4 tab. 14 ref.］

Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest

doi: 10.11833/j.issn.2095-0756.2015.01.012

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Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest

doi: 10.11833/j.issn.2095-0756.2015.01.012

1. School of Forestry, Central South University of Forestry & Technology, Changsha 410004, Hunan, China

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Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest

doi: 10.11833/j.issn.2095-0756.2015.01.012

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Stand spatial structure for an uneven-aged Cunninghamia lanceolata ecological forest

doi: 10.11833/j.issn.2095-0756.2015.01.012

1. School of Forestry, Central South University of Forestry & Technology, Changsha 410004, Hunan, China

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