Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China
Even though the process of plant water use under individual environmental stress conditions (drought, heat, cold, salinity, etc.) has been widely studied, the processes through which plants cope with multiple stresses (such as water stress combined with hot temperature) remain inconclusive. In the d...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Agricultural Water Management |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378377423003323 |
| _version_ | 1797706886313672704 |
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| author | Panpan Hou Dianyu Chen Xuehui Wei Xiaotao Hu Xingwu Duan Jingying Zhang Lucheng Qiu Linlin Zhang |
| author_facet | Panpan Hou Dianyu Chen Xuehui Wei Xiaotao Hu Xingwu Duan Jingying Zhang Lucheng Qiu Linlin Zhang |
| author_sort | Panpan Hou |
| collection | DOAJ |
| description | Even though the process of plant water use under individual environmental stress conditions (drought, heat, cold, salinity, etc.) has been widely studied, the processes through which plants cope with multiple stresses (such as water stress combined with hot temperature) remain inconclusive. In the dry-hot valley region of southwest China, soil moisture, temperature, radiation and the associated stresses make complex the process of plant transpiration. To determine environmental controls on the water use of a typical orange tree in the region, sap flow was monitored in the trunks of seven orange trees, meteorological factors and soil water content were recorded between 20 May 2020, and 31 May 2022. The seasons were classified into: rainy (June–October), dry (November–February the other year), and dry-hot (March–May). Results showed that the transpiration of orange trees (Tc) in the study area was 659 mm of water per year. Compared with rainy (2.04 mm d-1) and dry (2.14 mm d-1) seasons, Tc was significantly lower during the dry-hot season (1.38 mm d-1). Rainfall had a significant impact on the transpiration process. Compared with the pre-rainfall value, Tc decreased after light rainfall events (<10 mm), but increased after heavy rainfall events (>10 mm). The variation in Tc increased initially and later gradually decreased with increasing rainfall amount. The minimum rainfall threshold that triggered an increase in Tc was 10.9 mm. Compared with the pre-rainfall days, Tc decreased for almost all types of rainfall event on rainy days. The drop in Tc was driven by the volume, time, and duration of rainfall. There was no direct correlation between Tc and most environmental factors (R2 < 0.40). However, Tc/ET0 (ET0 is grass reference evapotranspiration) was strongly correlated with the environmental factors. Net radiation (R2 = 0.61–0.73), air temperature (R2 = 0.39–0.49), daily maximum air temperature (R2 = 0.49–0.73), vapor pressure deficit (R2 = 0.34–0.45), and ET0 (R2 = 0.64–0.74) were negatively logarithmically correlated with daily Tc/ET0. However, daily Tc/ET0 was positively logarithmically correlated with VWC/ET0; R2 = 0.60–0.83 (where VWC is soil water content) and VWC/Tamax; R2 = 0.32–0.56 (where Tamax is maximum air temperature). Among the studied environmental factors, VWC/ET0 had the highest correlation with Tc/ET0 (R2 as high as 0.83). These results were critical for accurate evaluation of the effects of interaction of water and heat on plant water use. The study is therefore useful for effective water management in arid and semiarid regions. This is particularly so when concurrent hot and dry conditions were considered, likely to occur under future climatic conditions. |
| first_indexed | 2024-03-12T05:59:00Z |
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| id | doaj.art-dc96e80a727948a7a5a594ab7e735c17 |
| institution | Directory Open Access Journal |
| issn | 1873-2283 |
| language | English |
| last_indexed | 2024-03-12T05:59:00Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
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| series | Agricultural Water Management |
| spelling | doaj.art-dc96e80a727948a7a5a594ab7e735c172023-09-03T04:23:23ZengElsevierAgricultural Water Management1873-22832023-10-01288108467Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest ChinaPanpan Hou0Dianyu Chen1Xuehui Wei2Xiaotao Hu3Xingwu Duan4Jingying Zhang5Lucheng Qiu6Linlin Zhang7Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, China; Corresponding authors.Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, China; Corresponding authors.Institute of International Rivers and Eco-security, Yunnan University, Kunming 650091, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling 712100, ChinaShaanxi Huanghe Guxian Water Conservancy Development co., LTD, Xian 710018, ChinaEven though the process of plant water use under individual environmental stress conditions (drought, heat, cold, salinity, etc.) has been widely studied, the processes through which plants cope with multiple stresses (such as water stress combined with hot temperature) remain inconclusive. In the dry-hot valley region of southwest China, soil moisture, temperature, radiation and the associated stresses make complex the process of plant transpiration. To determine environmental controls on the water use of a typical orange tree in the region, sap flow was monitored in the trunks of seven orange trees, meteorological factors and soil water content were recorded between 20 May 2020, and 31 May 2022. The seasons were classified into: rainy (June–October), dry (November–February the other year), and dry-hot (March–May). Results showed that the transpiration of orange trees (Tc) in the study area was 659 mm of water per year. Compared with rainy (2.04 mm d-1) and dry (2.14 mm d-1) seasons, Tc was significantly lower during the dry-hot season (1.38 mm d-1). Rainfall had a significant impact on the transpiration process. Compared with the pre-rainfall value, Tc decreased after light rainfall events (<10 mm), but increased after heavy rainfall events (>10 mm). The variation in Tc increased initially and later gradually decreased with increasing rainfall amount. The minimum rainfall threshold that triggered an increase in Tc was 10.9 mm. Compared with the pre-rainfall days, Tc decreased for almost all types of rainfall event on rainy days. The drop in Tc was driven by the volume, time, and duration of rainfall. There was no direct correlation between Tc and most environmental factors (R2 < 0.40). However, Tc/ET0 (ET0 is grass reference evapotranspiration) was strongly correlated with the environmental factors. Net radiation (R2 = 0.61–0.73), air temperature (R2 = 0.39–0.49), daily maximum air temperature (R2 = 0.49–0.73), vapor pressure deficit (R2 = 0.34–0.45), and ET0 (R2 = 0.64–0.74) were negatively logarithmically correlated with daily Tc/ET0. However, daily Tc/ET0 was positively logarithmically correlated with VWC/ET0; R2 = 0.60–0.83 (where VWC is soil water content) and VWC/Tamax; R2 = 0.32–0.56 (where Tamax is maximum air temperature). Among the studied environmental factors, VWC/ET0 had the highest correlation with Tc/ET0 (R2 as high as 0.83). These results were critical for accurate evaluation of the effects of interaction of water and heat on plant water use. The study is therefore useful for effective water management in arid and semiarid regions. This is particularly so when concurrent hot and dry conditions were considered, likely to occur under future climatic conditions.http://www.sciencedirect.com/science/article/pii/S0378377423003323Dry-hot valleySap flowThreshold-delay modelPlant water useEnvironmental response |
| spellingShingle | Panpan Hou Dianyu Chen Xuehui Wei Xiaotao Hu Xingwu Duan Jingying Zhang Lucheng Qiu Linlin Zhang Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China Agricultural Water Management Dry-hot valley Sap flow Threshold-delay model Plant water use Environmental response |
| title | Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China |
| title_full | Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China |
| title_fullStr | Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China |
| title_full_unstemmed | Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China |
| title_short | Transpiration characteristics and environmental controls of orange orchards in the dry-hot valley region of southwest China |
| title_sort | transpiration characteristics and environmental controls of orange orchards in the dry hot valley region of southwest china |
| topic | Dry-hot valley Sap flow Threshold-delay model Plant water use Environmental response |
| url | http://www.sciencedirect.com/science/article/pii/S0378377423003323 |
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