Plant thinning effect of Chinese fir seed orchard in Qingyuan

CHEN Yi-liang; NI Rong-xin; CHEN Min-hong; WANG Zhao-min; PANG Pin-zhen

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Volume 17 Issue 1

Jul. 2017

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Article Navigation > Journal of Zhejiang A&F University > 2000 > 17(1): 5-8

CHEN Yi-liang, NI Rong-xin, CHEN Min-hong, WANG Zhao-min, PANG Pin-zhen. Plant thinning effect of Chinese fir seed orchard in Qingyuan[J]. Journal of Zhejiang A&F University, 2000, 17(1): 5-8.

Citation:

CHEN Yi-liang, NI Rong-xin, CHEN Min-hong, WANG Zhao-min, PANG Pin-zhen. Plant thinning effect of Chinese fir seed orchard in Qingyuan[J]. Journal of Zhejiang A&F University, 2000, 17(1): 5-8.

Plant thinning effect of Chinese fir seed orchard in Qingyuan

1.
Qingyuan Forest Farm of Qingyuan County , Qingyuan 323805, Zhejiang , China;
2.
The Research Institute of Subtropical Forestry , CAF, Fuyang 311400, Zhejiang , China

Funds:

九五国家科技攻关项目(96-011-03-01-05); 浙江省林业厅资助项目

Received Date: 1999-05-03
Rev Recd Date: 1999-11-02
Publish Date: 2000-03-20

Abstract

The plant selected thinning with the intensity at 20 % ～ 30 % was conducted in the Chinese fir seed orchard grew for 12 years in Qingyuan Forest Farm of Zhejiang .The observations were made in the later seven years.It showed that through thinning the yearly growth of clones tree height , DBH and lateral branch were 51.0 %, 58.0 % and 88.2 % higher than those untreated respectively . Average amounts of female and male cone flowers produced by the thinned forests were 4.16 and 3.54 times that of the check .The yield of cone per hectare in thinned plot was 1.30 ～ 1.39 times that of the untreated , and the single tree yield of cone in thinned plot was 1.48～ 2.12 times that of the check .Meanwhile , it also revealed that the effect of plot averaged increase production in 0.5 of forest canopy density was larger than that in 0.7 of forest canopy density .
- Chinese fir (Cunninghamia lanceolata),
- seed orchard,
- thinning,
- female and male flower,
- cone (plant),
- yield

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Plant thinning effect of Chinese fir seed orchard in Qingyuan

1. Qingyuan Forest Farm of Qingyuan County , Qingyuan 323805, Zhejiang , China;

2. The Research Institute of Subtropical Forestry , CAF, Fuyang 311400, Zhejiang , China

Funds:

九五国家科技攻关项目(96-011-03-01-05); 浙江省林业厅资助项目

Received Date: 1999-05-03
Rev Recd Date: 1999-11-02
Publish Date: 2000-03-20

Key words:

Abstract: The plant selected thinning with the intensity at 20 % ～ 30 % was conducted in the Chinese fir seed orchard grew for 12 years in Qingyuan Forest Farm of Zhejiang .The observations were made in the later seven years.It showed that through thinning the yearly growth of clones tree height , DBH and lateral branch were 51.0 %, 58.0 % and 88.2 % higher than those untreated respectively . Average amounts of female and male cone flowers produced by the thinned forests were 4.16 and 3.54 times that of the check .The yield of cone per hectare in thinned plot was 1.30 ～ 1.39 times that of the untreated , and the single tree yield of cone in thinned plot was 1.48～ 2.12 times that of the check .Meanwhile , it also revealed that the effect of plot averaged increase production in 0.5 of forest canopy density was larger than that in 0.7 of forest canopy density .

CHEN Yi-liang, NI Rong-xin, CHEN Min-hong, WANG Zhao-min, PANG Pin-zhen. Plant thinning effect of Chinese fir seed orchard in Qingyuan[J]. Journal of Zhejiang A&F University, 2000, 17(1): 5-8.

Citation:

CHEN Yi-liang, NI Rong-xin, CHEN Min-hong, WANG Zhao-min, PANG Pin-zhen. Plant thinning effect of Chinese fir seed orchard in Qingyuan[J]. Journal of Zhejiang A&F University, 2000, 17(1): 5-8.

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Plant thinning effect of Chinese fir seed orchard in Qingyuan

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通讯作者: 陈斌, bchen63@163.com

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Plant thinning effect of Chinese fir seed orchard in Qingyuan

1. Qingyuan Forest Farm of Qingyuan County , Qingyuan 323805, Zhejiang , China;

2. The Research Institute of Subtropical Forestry , CAF, Fuyang 311400, Zhejiang , China

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Plant thinning effect of Chinese fir seed orchard in Qingyuan

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通讯作者: 陈斌, bchen63@163.com

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Proportional views

Plant thinning effect of Chinese fir seed orchard in Qingyuan

1. Qingyuan Forest Farm of Qingyuan County , Qingyuan 323805, Zhejiang , China; 2. The Research Institute of Subtropical Forestry , CAF, Fuyang 311400, Zhejiang , China

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1. Qingyuan Forest Farm of Qingyuan County , Qingyuan 323805, Zhejiang , China;

2. The Research Institute of Subtropical Forestry , CAF, Fuyang 311400, Zhejiang , China