Volume 26 Issue 2
Apr.  2009
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ZHAO Li-juan, JIANG Wen-wei, YANG Shu-zhen, ZHAO Ming-shui, WEN Guo-sheng. Stem sap flow of Cryptomeria fortunei in Mount Tianmu National Nature Reserve[J]. Journal of Zhejiang A&F University, 2009, 26(2): 169-175.
Citation: ZHAO Li-juan, JIANG Wen-wei, YANG Shu-zhen, ZHAO Ming-shui, WEN Guo-sheng. Stem sap flow of Cryptomeria fortunei in Mount Tianmu National Nature Reserve[J]. Journal of Zhejiang A&F University, 2009, 26(2): 169-175.

Stem sap flow of Cryptomeria fortunei in Mount Tianmu National Nature Reserve

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  • Corresponding author: JIANG Wen-wei
  • Publish Date: 2009-04-20
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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Stem sap flow of Cryptomeria fortunei in Mount Tianmu National Nature Reserve

    Corresponding author: JIANG Wen-wei

Abstract: The group of Cryptomeria fortunei trees in the Mount Tianmu Nature Reserve of Zhejiang Province fall into a decline. In order to find out their life activities,the diurnal and monthly variations of stem sap flow in old growth C. fortunei and environmental factors in the Mount Tianmu Nature Reserve were measured using the Environmental Information System (ENVIS) ecological environment monitoring network. Results showed that the daily change in stem sap flow velocity of declining Cryptomeria fortunei displayed single peak or multi-peaked curves with an obvious day and night rhythmic variation that fluctuated with environmental factors. For seasonal variation,the maximum average stem sap flow was 56.7 mL·min-1 in November,which was 22.9 mL·min-1 more than in February (33.8 mL·min-1). Also,the range of stem sap flow in the sunshine was greater than for a rainy day. The main environmental factors related to stem sap flow velocity were 1) photosynthetic active radiation(PAR)(r = 0.913) and 2) air temperature(r = 0.903) and relative humidity(r = 0.897). [Ch,5 fig. 1 tab. 26 ref.]

ZHAO Li-juan, JIANG Wen-wei, YANG Shu-zhen, ZHAO Ming-shui, WEN Guo-sheng. Stem sap flow of Cryptomeria fortunei in Mount Tianmu National Nature Reserve[J]. Journal of Zhejiang A&F University, 2009, 26(2): 169-175.
Citation: ZHAO Li-juan, JIANG Wen-wei, YANG Shu-zhen, ZHAO Ming-shui, WEN Guo-sheng. Stem sap flow of Cryptomeria fortunei in Mount Tianmu National Nature Reserve[J]. Journal of Zhejiang A&F University, 2009, 26(2): 169-175.

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