Quantifying the importance of deep root water uptake for apple trees' hydrological and physiological performance in drylands
文献类型：期刊论文
| 作者 | Yang, Min1; Gao, Xiaodong2,3; Wang, Shaofei1; Zhao, Xining2,3 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 606页码:10 |
| 关键词 | Deep soil Partitioned Drought Transpiration Leaf water potential Photosynthesis |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2022.127471 |
| 通讯作者 | Gao, Xiaodong(gao_xiaodong@nwafu.edu.cn) |
| 英文摘要 | In drylands, planted trees generally develop roots through mechanisms that enhance their capacity to forage for resources, particularly water, in deep soils and thus survive droughts. However, it remains unclear how and to what extent, lack of access to deep root water uptake will affect the water balance, growth and production of trees in water-limited ecosystems. To address this gap, we designed a novel experiment to partition soils and roots below 200 cm depth from higher layers in a dryland orchard on China's Loess Plateau to evaluate the response of apple (Malus pumila Mill.) trees to the lack of deep roots and access to deep soil resource in 2019 and 2020 (when a natural extreme drought occurred). We found that without partitioning apple trees clearly used deep soil water, thereby causing more soil desiccation than partitioned trees, especially during the drought. The unavailability of deep soil water resulted in much greater water stress, which cause a decrease of 36 % in transpiration, 20 % in photosynthesis rate and 32 % in mid-day leaf water potential relative to unpartitioned trees. Consequently, the yield and quality of apple trees also clearly decreased 11 % and 15 %. These findings suggest that the absence of uptake of deep soil water by roots reduced trees' drought resistance. However, the partitioned trees had clearly higher water use efficiency (WUE) than the unpartitioned trees, although in both cases WUE was strongly reduced by the extreme drought. Our results demonstrate that deep soil resources and roots play key roles in trees' responses to drought, and are likely to play crucial roles in future ecosystem dynamics. |
| WOS关键词 | SOIL-MOISTURE ; LOESS PLATEAU ; DROUGHT ; MORTALITY ; FOREST ; GROWTH ; DEPTH ; MECHANISMS ; DEPLETION ; DECLINE |
| 资助项目 | National Key Research and Development Program of China[2021YFD1900700] ; National Natural Science Foundation of China[41771316] ; National Natural Science Foundation of China[42125705] ; Shaanxi Key Research and Development Program[2020ZDLNY07-04] ; Natural Science Basic Research Program of Shaanxi[2021JC-19] ; Cyrus Tang Foundation ; 111 project[B12007] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000752810500004 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Shaanxi Key Research and Development Program ; Natural Science Basic Research Program of Shaanxi ; Cyrus Tang Foundation ; 111 project |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/170905]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Gao, Xiaodong |
| 作者单位 | 1.Northwest A&F Univ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Minist Educ, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Min,Gao, Xiaodong,Wang, Shaofei,et al. Quantifying the importance of deep root water uptake for apple trees' hydrological and physiological performance in drylands[J]. JOURNAL OF HYDROLOGY,2022,606:10. |
| APA | Yang, Min,Gao, Xiaodong,Wang, Shaofei,&Zhao, Xining.(2022).Quantifying the importance of deep root water uptake for apple trees' hydrological and physiological performance in drylands.JOURNAL OF HYDROLOGY,606,10. |
| MLA | Yang, Min,et al."Quantifying the importance of deep root water uptake for apple trees' hydrological and physiological performance in drylands".JOURNAL OF HYDROLOGY 606(2022):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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