Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s40333-017-0024-4 |
Time lag characteristics of sap flow in seed-maize and their implications for modeling transpiration in an arid region of Northwest China | |
Bo Xiaodong1; Du Taisheng1; Ding Risheng1; Comas, Louise2 | |
通讯作者 | Du Taisheng |
来源期刊 | JOURNAL OF ARID LAND |
ISSN | 1674-6767 |
EISSN | 2194-7783 |
出版年 | 2017 |
卷号 | 9期号:4页码:515-529 |
英文摘要 | Plant capacity for water storage leads to time lags between basal stem sap flow and transpiration in various woody plants. Internal water storage depends on the sizes of woody plants. However, the changes and its influencing factors in time lags of basal stem flow during the development of herbaceous plants including crops remain unclear. A field experiment was conducted in an arid region of Northwest China to examine the time lag characteristics of sap flow in seed-maize and to calibrate the transpiration modeling. Cross-correlation analysis was used to estimate the time lags between stem sap flow and meteorological driving factors including solar radiation (R-s) and vapor pressure deficit of the air (VPDair). Results indicate that the changes in seed-maize stem sap flow consistently lagged behind the changes in Rs and preceded the changes in VPDair both on hourly and daily scales, suggesting that light-mediated stomatal closures drove sap flow responses. The time lag in the maize’s sap flow differed significantly during different growth stages and the difference was potentially due to developmental changes in capacitance tissue and/or xylem during ontogenesis. The time lags between stem sap flow and Rs in both female plants and male plants corresponded to plant use of stored water and were independent of total plant water use. Time lags of sap flow were always longer in male plants than in female plants. Theoretically, dry soil may decrease the speed by which sap flow adjusts ahead of shifts in VPDair in comparison with wet soil and also increase the speed by which sap flow adjusts to R-s . However, sap flow lags that were associated with R-s before irrigation and after irrigation in female plants did not shift. Time series analysis method provided better results for simulating seed-maize sap flow with advantages of allowing for fewer variables to be included. This approach would be helpful in improving the accuracy of estimation for canopy transpiration and conductance using meteorological measurements. |
英文关键词 | seed-maize sap flow capacitance transfer function model time lag stored water use |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000404664400004 |
WOS关键词 | VAPOR-PRESSURE DEFICIT ; STEM WATER STORAGE ; ABIES-AMABILIS FOREST ; PINUS-PINASTER AIT ; CANOPY CONDUCTANCE ; TROPICAL FOREST ; STAND TRANSPIRATION ; STOMATAL CONDUCTANCE ; FLUX MEASUREMENTS ; HEAT-BALANCE |
WOS类目 | Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 中国农业大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200179 |
作者单位 | 1.China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China; 2.ARS, Water Management Res, USDA, Bldg 011A, Beltsville, MD 20705 USA |
推荐引用方式 GB/T 7714 | Bo Xiaodong,Du Taisheng,Ding Risheng,et al. Time lag characteristics of sap flow in seed-maize and their implications for modeling transpiration in an arid region of Northwest China[J]. 中国农业大学,2017,9(4):515-529. |
APA | Bo Xiaodong,Du Taisheng,Ding Risheng,&Comas, Louise.(2017).Time lag characteristics of sap flow in seed-maize and their implications for modeling transpiration in an arid region of Northwest China.JOURNAL OF ARID LAND,9(4),515-529. |
MLA | Bo Xiaodong,et al."Time lag characteristics of sap flow in seed-maize and their implications for modeling transpiration in an arid region of Northwest China".JOURNAL OF ARID LAND 9.4(2017):515-529. |
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