| 天目山柳杉古树的液流特征研究 |
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| 引用本文： | 蒋文伟,汤富彬,刘志梅,赵明水.天目山柳杉古树的液流特征研究[J].林业科学研究,2012,25(1):58-64. |
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| 作者姓名： | 蒋文伟 汤富彬 刘志梅 赵明水 |
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| 作者单位： | 浙江农林大学风景园林与建筑学院,浙江 临安 311300;中国林业科学研究院亚热带林业研究所,浙江 富阳 311400;浙江农林大学风景园林与建筑学院,浙江 临安 311300;浙江天目山国家级自然保护区管理局,浙江 临安 311311 |
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| 基金项目： | 国家自然科学基金项目"基于ENVIS监测技术系统的柳杉古树茎干液流时空变异性研究"(30972342) |
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| 摘 要： | 应用热扩散技术法,于2010年4—8月对浙江天目山自然保护区内的2株柳杉古树的树干液流进行连续观测,结合所测定的相关环境因子,分析了柳杉树干液流和耗水量的变化规律,以及液流与各环境因子的关系。结果表明:不同季节柳杉树干液流速率日变化规律基本一致,呈单峰波动曲线,但树干液流启动时间、达到峰值时间及迅速下降时间存在明显差异;树干液流密度与光合有效辐射、空气温度和水汽压差间存在极显著正相关,与空气相对湿度和CO2浓度呈极显著负相关;液流密度随树干直径的增加,无明显变化差异,但液流速率和日均耗水量均随树干直径的增加而增大;胸径75.6 cm柳杉和胸径62.8 cm柳杉的日均耗水量季节变化过程相同,但2者变化差异较大,6月份日均耗水量最低,分别为(49.356±14.883) kg和(9.531±4.297)kg;4月份日均耗水量最高,分别为(110.022±21.890)kg和(49.352±2.629)kg。
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| 关 键 词： | 柳杉古树 树干液流 耗水量 |
| 收稿时间： | 2011/7/11 0:00:00 |
Study on the Sap Flow Characters of Two Old Trees of Cryptomeria fortunei on Tianmu Mountain |
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| JIANG Wen-wei,TANG Fu-bin,LIU Zhi-mei and ZHAO Ming-shui.Study on the Sap Flow Characters of Two Old Trees of Cryptomeria fortunei on Tianmu Mountain[J].Forest Research,2012,25(1):58-64. |
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| Authors: | JIANG Wen-wei TANG Fu-bin LIU Zhi-mei and ZHAO Ming-shui |
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| Institution: | School of Landscape Architecture, Zhejiang A & F University, Lin'an 311300, Zhejiang, China;Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China;School of Landscape Architecture, Zhejiang A & F University, Lin'an 311300, Zhejiang, China;Administration Office, National Nature Reserve of Mount Tianmu, Lin'an 311311, Zhejiang, China |
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| Abstract: | From April to August in 2010,the stem sap flow of two old trees of Cryptomeria fortunei which grow in the National Natural Reserve of Mount Tianmu was continuously detected with the thermal dissipation probe(TDP).The aim of this study was to evaluate the diurnal and seasonal variation of stem sap flow velocity and the change of water consumption of C.fortunei,as well as to analyze how environmental factors were affecting the stem sap flow of C.fortunei.The results showed that,in different season,the diurnal variation of stem sap flow velocity of C.fortunei presented a single-peaked curve,but there were some differences in starting time,peak time and rapid-falling time.The stem sap flow density had a positive relation with photosynthetic active radiation(PAR),air temperature,and vapor pressure deficit(VPD) while a negative relation with relative humidity and CO2 significantly.Both the stem sap flow velocity and average daily water consumption increased with the increase of tree’s diameter,but the stem sap flow density had no such trait.The changes of average daily water consumption of two trees with a diameter of 75.6 cm and 62.8 cm had the same ecological process,the lowest water consumptions were(49.356±14.883) kg and(9.531±4.297) kg in June and the highest were(110.022±21.890)kg and(49.352±2.629)kg in April respectively. |
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| Keywords: | old tree of Cryptomeria fortunei stem sap flow water consumption |
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