Net primary productivity estimates for Zhejiang Province based on the CASA model

YU Jing-fang; YU Shu-quan; ZHANG Chao; LI Tu-sheng

doi:10.11833/j.issn.2095-0756.2012.04.001

Volume 29 Issue 4

Jul. 2012

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YU Jing-fang, YU Shu-quan, ZHANG Chao, LI Tu-sheng. Net primary productivity estimates for Zhejiang Province based on the CASA model[J]. Journal of Zhejiang A&F University, 2012, 29(4): 473-481. doi: 10.11833/j.issn.2095-0756.2012.04.001

Citation:

YU Jing-fang, YU Shu-quan, ZHANG Chao, LI Tu-sheng. Net primary productivity estimates for Zhejiang Province based on the CASA model[J]. Journal of Zhejiang A&F University, 2012, 29(4): 473-481. doi: 10.11833/j.issn.2095-0756.2012.04.001

Net primary productivity estimates for Zhejiang Province based on the CASA model

doi: 10.11833/j.issn.2095-0756.2012.04.001

1.
School of Forestry and Biotechnology，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;
2.
The Nurturing Station for the State Key Laboratory of Subtropical Silviculture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;
3.
Zhejiang Forestry Ecological Engineering Administration，Hangzhou 310020，Zhejiang，China

More Information

Corresponding author: YU Shu-quan
Received Date: 2011-09-19
Rev Recd Date: 2011-11-30
Publish Date: 2012-08-20

Abstract

Changes in vegetation and net primary productivity （NPP） are important indicators representing regional ecological qualitative changes. To examine NPP vegetative seasonal variation，spatial patterns，and land use change that affected variation，an NPP simulation was performed for Zhejiang Province in 2006 based on the Carnegie-Ames-Stanford Approach （CASA） model with results further analyzed by Geographic Information System（GIS）-based software. Results showed that （1） average annual NPP was about 625.68 gm-2a-1. NPP also showed a spatial heterogeneity which lying down within the relief over the study area. NPP differed with land use type，but there seems to be a similar seasonal change which increased fast in Feb. to May and peaked in July and Aug. （2） Total NPP in 2006 was about 6 451.2 104 ta-1 with more than 70% found mainly in forest and cropland near each city in Zhejiang Province. Total NPP of Lishui City was highest （1 336.05 104 ta-1）；whereas Zhoushan City was lowest （47.18 104 ta-1）. For the Ecological Service Forests，the average annual NPP was about 815.28 gm-2a-1 which was higher than the mean values of forests. （3） Compared to 1996，total NPP in 2006 increased about 52.96 104 ta-1 due to land use type change. Thus，to effectively enhance vegetation NPP for Zhejiang Province，a forest network system should be built in the plains areas，the project accelerating the succession of coniferous forest into broadleaf forest should be conducted in mountain areas，and an intensive management for bamboo stands should be undertaken.［Ch，2 fig. 3 tab. 19 ref.］
- forest ecology,
- net primary productivity （NPP）,
- spatial analysis,
- seasonal change,
- land use,
- Zhejiang Province

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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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Net primary productivity estimates for Zhejiang Province based on the CASA model

1. School of Forestry and Biotechnology，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;

2. The Nurturing Station for the State Key Laboratory of Subtropical Silviculture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;

3. Zhejiang Forestry Ecological Engineering Administration，Hangzhou 310020，Zhejiang，China

Corresponding author: YU Shu-quan

Received Date: 2011-09-19

Rev Recd Date: 2011-11-30

Publish Date: 2012-08-20

Key words:

Abstract: Changes in vegetation and net primary productivity （NPP） are important indicators representing regional ecological qualitative changes. To examine NPP vegetative seasonal variation，spatial patterns，and land use change that affected variation，an NPP simulation was performed for Zhejiang Province in 2006 based on the Carnegie-Ames-Stanford Approach （CASA） model with results further analyzed by Geographic Information System（GIS）-based software. Results showed that （1） average annual NPP was about 625.68 gm-2a-1. NPP also showed a spatial heterogeneity which lying down within the relief over the study area. NPP differed with land use type，but there seems to be a similar seasonal change which increased fast in Feb. to May and peaked in July and Aug. （2） Total NPP in 2006 was about 6 451.2 104 ta-1 with more than 70% found mainly in forest and cropland near each city in Zhejiang Province. Total NPP of Lishui City was highest （1 336.05 104 ta-1）；whereas Zhoushan City was lowest （47.18 104 ta-1）. For the Ecological Service Forests，the average annual NPP was about 815.28 gm-2a-1 which was higher than the mean values of forests. （3） Compared to 1996，total NPP in 2006 increased about 52.96 104 ta-1 due to land use type change. Thus，to effectively enhance vegetation NPP for Zhejiang Province，a forest network system should be built in the plains areas，the project accelerating the succession of coniferous forest into broadleaf forest should be conducted in mountain areas，and an intensive management for bamboo stands should be undertaken.［Ch，2 fig. 3 tab. 19 ref.］

Net primary productivity estimates for Zhejiang Province based on the CASA model

doi: 10.11833/j.issn.2095-0756.2012.04.001

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

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