Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.agrformet.2018.04.007 |
The role of heartwood water storage for sem-arid trees under drought | |
Hu, Guozheng1,4; Liu, Hongyan1; Shangguan, Huailiang1; Wu, Xiuchen2; Xu, Xiaotian1,5; Williams, Mathew3 | |
通讯作者 | Liu, Hongyan |
来源期刊 | AGRICULTURAL AND FOREST METEOROLOGY
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ISSN | 0168-1923 |
EISSN | 1873-2240 |
出版年 | 2018 |
卷号 | 256页码:534-541 |
英文摘要 | Stem water storage is an important water pool in forests. However, we know little about the heartwood water use processes and the water use strategies of trees in semi-arid temperate forests. We investigated Simon poplar (Populus simonii), a heartwood water storage tree species. A combination of methods (sap flow, the dendrometer and the soil-plant-atmosphere canopy model were used to trace the water use dynamics of Simon poplar trees. The aim was to understand how this heartwood water storage tree species survives under drought stress. Our field data showed that P. simonii had significantly higher heartwood water content (60%) than other tree species (30%) in the same region. The enhanced tree water deficit (TWD) and continuous stem shrinkage showed that the heartwood water supply was able to maintain sap flow (1.5-4.6 mm/d) during early growing season droughts. The strong water absorption ability of the roots resulted in the quick recovery of TWD, which caused the rain water could hardly reach 50 cm depth in the soil. The weakened link between transpiration and root water assimilation of heartwood water storage trees meant that sap flow was more sensitive to drivers such as air temperature (R=-0.71, p < 0.01) and vapor pressure deficit (R = 0.69, p < 0.01). These results suggest that heartwood water storage may buffer drought events during the growing season and reduce the wide fluctuation in interannual precipitation. Therefore, heartwood water storage needs to be taken into account when calculating the soil-plant-atmosphere continuum and creating tree survival models. |
英文关键词 | Plant water pool Climate change Sap flow Dendrometer Heartwood water storage Water use strategy Water deficit Populus |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; Scotland |
收录类别 | SCI-E |
WOS记录号 | WOS:000437060700046 |
WOS关键词 | PLANT-ATMOSPHERE CONTINUUM ; FACULTATIVE CAM PLANT ; SAP FLOW ; SOIL-WATER ; MODELING ANALYSIS ; SUCCULENT PLANTS ; L. SEEDLINGS ; RAINY-SEASON ; FOREST ; GROWTH |
WOS类目 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
来源机构 | 北京师范大学 ; 北京大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207320 |
作者单位 | 1.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China; 2.Beijing Normal Univ, Coll Resources Sci & Technol, Beijing 100875, Peoples R China; 3.Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland; 4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China; 5.Chinese Acad Forestry, Res Inst Desertificat, Beijing 100091, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Guozheng,Liu, Hongyan,Shangguan, Huailiang,et al. The role of heartwood water storage for sem-arid trees under drought[J]. 北京师范大学, 北京大学,2018,256:534-541. |
APA | Hu, Guozheng,Liu, Hongyan,Shangguan, Huailiang,Wu, Xiuchen,Xu, Xiaotian,&Williams, Mathew.(2018).The role of heartwood water storage for sem-arid trees under drought.AGRICULTURAL AND FOREST METEOROLOGY,256,534-541. |
MLA | Hu, Guozheng,et al."The role of heartwood water storage for sem-arid trees under drought".AGRICULTURAL AND FOREST METEOROLOGY 256(2018):534-541. |
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