Temporal and spatial changes for sap flow velocity of <em>Cryptomeria fortunei</em> stems in National Nature Reserve of Mount Tianmu

JIANG Wen-wei; GUO Yun-xue; YANG Shu-zhen; ZHAO Ming-shui

doi:10.11833/j.issn.2095-0756.2012.06.009

Volume 29 Issue 6

Nov. 2012

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JIANG Wen-wei, GUO Yun-xue, YANG Shu-zhen, ZHAO Ming-shui. Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu[J]. Journal of Zhejiang A&F University, 2012, 29(6): 859-866. doi: 10.11833/j.issn.2095-0756.2012.06.009

Citation:

JIANG Wen-wei, GUO Yun-xue, YANG Shu-zhen, ZHAO Ming-shui. Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu[J]. Journal of Zhejiang A&F University, 2012, 29(6): 859-866. doi: 10.11833/j.issn.2095-0756.2012.06.009

Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu

doi: 10.11833/j.issn.2095-0756.2012.06.009

1.
School of Landscape Architecture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;
2.
Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311311，Zhejiang，China

More Information

Corresponding author: JIANG Wen-wei
Received Date: 2011-12-29
Rev Recd Date: 2012-04-07
Publish Date: 2012-12-20

Abstract

To protect the Cryptomeria fortunei plant community in National Nature Reserve of Mount Tianmu，the temporal and spatial changes of stem sap flow velocity and transpiration as well as their relationship to meteorological factors were studied using a thermal dissipation probe （TDP）. Also，internal mechanisms of water physiology were explained. Results showed that the diurnal change of sap flow velocity was a single peak curve. In spring，sap flow started at 06：20，peaked at 12：30，and fell quickly at 18：50. However in summer，it started at 07：00，peaked at 13：20，and fell quickly at 19：40. The peak value，average daily velocity，and sap flow flux in spring were larger than in summer with a larger diameter stem having a greater sap flow velocity. For stem orientation，compared with the average sap flow，in spring flow velocity in the southern section was largest （187.3%） and in the western part lowest （15.4%）；however，in summer sap flow velocity in the east was largest （226.2%） and lowest in the north （33.1%）. Sap flow for vertical height of the stem by season，showed that in spring the order of average daily sap flow velocity for the middle （61.71 gmin－1）＞ the top （48.36 gmin－1）＞ the bottom （35.10 gmin－1），but in summer revealed the top （20.65 gmin－1）＞ the bottom （14.81 gmin－1）＞ the middle （10.43 gmin－1）.［Ch，5 fig. 3 tab. 30 ref.］
- botany,
- Cryptomeria fortunei,
- thermal dissipation,
- sap flow velocity,
- temporal and spatial change,
- Mount Tianmu

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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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Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu

1. School of Landscape Architecture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;

2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311311，Zhejiang，China

Corresponding author: JIANG Wen-wei

Received Date: 2011-12-29

Rev Recd Date: 2012-04-07

Publish Date: 2012-12-20

Key words:

Abstract: To protect the Cryptomeria fortunei plant community in National Nature Reserve of Mount Tianmu，the temporal and spatial changes of stem sap flow velocity and transpiration as well as their relationship to meteorological factors were studied using a thermal dissipation probe （TDP）. Also，internal mechanisms of water physiology were explained. Results showed that the diurnal change of sap flow velocity was a single peak curve. In spring，sap flow started at 06：20，peaked at 12：30，and fell quickly at 18：50. However in summer，it started at 07：00，peaked at 13：20，and fell quickly at 19：40. The peak value，average daily velocity，and sap flow flux in spring were larger than in summer with a larger diameter stem having a greater sap flow velocity. For stem orientation，compared with the average sap flow，in spring flow velocity in the southern section was largest （187.3%） and in the western part lowest （15.4%）；however，in summer sap flow velocity in the east was largest （226.2%） and lowest in the north （33.1%）. Sap flow for vertical height of the stem by season，showed that in spring the order of average daily sap flow velocity for the middle （61.71 gmin－1）＞ the top （48.36 gmin－1）＞ the bottom （35.10 gmin－1），but in summer revealed the top （20.65 gmin－1）＞ the bottom （14.81 gmin－1）＞ the middle （10.43 gmin－1）.［Ch，5 fig. 3 tab. 30 ref.］

Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu

doi: 10.11833/j.issn.2095-0756.2012.06.009

Abstract

References

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通讯作者: 陈斌, bchen63@163.com

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Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu

doi: 10.11833/j.issn.2095-0756.2012.06.009

1. School of Landscape Architecture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;

2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311311，Zhejiang，China

Corresponding author: JIANG Wen-wei

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Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu

doi: 10.11833/j.issn.2095-0756.2012.06.009

Abstract

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通讯作者: 陈斌, bchen63@163.com

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Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in National Nature Reserve of Mount Tianmu

doi: 10.11833/j.issn.2095-0756.2012.06.009

1. School of Landscape Architecture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China; 2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311311，Zhejiang，China

Corresponding author: JIANG Wen-wei

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1. School of Landscape Architecture，Zhejiang A & F University，Lin’an 311300，Zhejiang，China;

2. Management Office，National Nature Reserve of Mount Tianmu，Lin’an 311311，Zhejiang，China