干旱区生态环境知识资源中心(Arid): 黄土高原半干旱区刺槐生长盛期树干液流动态

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	黄土高原半干旱区刺槐生长盛期树干液流动态
其他题名	Growing season sap-flow dynamics of Robinia pseudoacacia plantation in the semi-arid region of Loess Plateau, China
	吴芳 1; 陈云明 1; 于占辉 2
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2010
卷号	34 期号:4 页码:469-476
中文摘要	通过研究树干液流速率与气象因子的关系,可以定量地分析树木生长与群落蒸腾耗水的相互关系,揭示黄土高原半干旱区刺槐水分利用动态及其适应环境因子的内在机理,为当地生态环境建设提供理论依据.应用热扩散式树干茎流计(TDP)于2008年7月1日至7月26日,在黄土高原半干旱区安塞县对刺槐(Robinia pseudoacacia)人工林生长盛期树干液流速率进行了连续测定,并对周围气象、土壤水分等指标进行了同步测定.刺槐生长盛期树干液流速率晴天日变化呈宽峰形曲线,在测量时期液流速率日平均值为0.001 33 cm·s~(-1);刺槐树干单位边材面积的液流速率与光合有效辐射、大气温度、水汽压差呈极显著正相关关系,与相对湿度呈负相关关系.其相关程度绝对值顺序为光合有效辐射>大气温度>水汽压差>相对湿度>风速:刺槐边材面积与胸径之间存在着显著的线性相关关系,相关系数为0.878,单位边材面积的液流速率随树干胸径的增大而减小.
英文摘要	Aim We studied the relationship between sap-flow velocity and meteorological factors to quantitatively correlate tree growth and transpirational water-consumption, determine the dynamic change of water use of Robinia pseudoacacia in a semi-arid region, reveal its mechanism to adapt to environmental factors and provide the theoretical basis for local ecological reconstruction of the environment.Methods A thermal dissipation probe (TDP) was used to measure the sap-flow dynamics of R. pseudoacacia in Ansai County in the semi-arid region of the Loess Plateau of China during July 1-26, 2008. Soil water content, photosynthetic active radiation (PAR), air temperature, relative humidity, water vapor pressure deficit (VPD) and wind speed were measured at the same time.Important findings Diurnal variation of sap flow displayed a broadly peaked curve during the season of rapid growth. The average value was 0.001 33 cm·s~(-1). Sap-flow velocity per unit sapwood area was significantly correlated with PAR, air temperature and VPD and was negatively correlated with atmospheric relative humidity. The ranking of correlation coefficients was PAR > air temperature > VPD > relative humidity > wind speed. Sapwood area and diameter at breast height (DBH) were significantly correlated (r = 0.878), and sap-flow velocity per unit sapwood area decreased with increased stem diameter.
中文关键词	气象因子 ; 黄土高原 ; 刺槐 ; 树干液流 ; 热扩散式探针
英文关键词	climatic factors, Loess Plateau, Robinia pseudoacacia, sap flow, thermal dissipation probe
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3870929
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225894
作者单位	1.西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国; 2.东北电力设计院, 长春, 吉林 130000, 中国
推荐引用方式 GB/T 7714	吴芳,陈云明,于占辉. 黄土高原半干旱区刺槐生长盛期树干液流动态[J]. 西北农林科技大学,2010,34(4):469-476.
APA	吴芳,陈云明,&于占辉.(2010).黄土高原半干旱区刺槐生长盛期树干液流动态.植物生态学报,34(4),469-476.
MLA	吴芳,et al."黄土高原半干旱区刺槐生长盛期树干液流动态".植物生态学报 34.4(2010):469-476.