Biophysical controls on nocturnal sap flow in plantation forests in a semi-arid region of northern China

Chen, Zuosinan; Zhang, Zhiqiang; Sun, Ge; Chen, Lixin; Xu, Hang; Chen, Shengnan

doi:10.1016/j.agrformet.2020.107904

Cited by 47 publications

(66 citation statements)

References 90 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, Q. variabilis contains more stomata per leaf area than P. orientalis, and the speed of water diffusion is higher, resulting in a larger sap flow rate. In this study, the presence of nocturnal fluid flow was confirmed in both P. orientalis and Q. variabilis, comprising 5-6% of the total sap flow, which is consistent with the results of previous studies (Forster et al 2014;Siddiq et al 2018;Chen et al 2020). However, the correlation between the rate of sap flow and VPD was poor, indicating that this part of the sap flow at night was used for water storage in the trunk but not for nocturnal transpiration.…”

Section: Water Migration and Usesupporting

confidence: 91%

“…Although previous studies state that the stomata are closed at night, and there is no sap flow during this period (Zeppel 2014;Zhang et al 2020), with the development and improvement of new technologies, the phenomenon of nocturnal sap flow has been confirmed in plants in different habitats (Hentschel et al 2013;Siddiq et al 2018;Chen et al 2020). Owing to the small proportion of nocturnal sap flow to the overall sap flow, traditional models have rarely considered nocturnal sap flow.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Water Storage of Plants Cannot Be Ignored During The Process of Water Movement

Liu

Wei

et al. 2021

Preprint

View full text Add to dashboard Cite

Water migration and use are important processes in trees. However, it is possible to overestimate transpiration by equating the water absorbed by plant roots with that diffused back to the atmosphere via the stomata. The δ2H/δ18O technique and heat ratio method were used to explore the patterns of water use of coniferous and broad-leaved tree species to determine the proportions of water used for transpiration and water storage. Our results indicate that both species showed strong plasticity in their use of water sources. The species Platycladus orientalis (Oriental arbor-vitae) and Quercus variabilis (Chinese cork oak) primarily absorbed water from groundwater and the 60–100 cm soil layer, and Q. variabilis also absorbed water from the 0–20 cm and 20–40 cm soil layers during the dry season. Only P. orientalis was sensitive to precipitation and used water from the 0–20 cm layers. Q. variabilis did not change its water source but increased its uptake of groundwater during the rainy season. We observed reverse flow and hydraulic redistribution in P. orientalis, which alleviated the spatial heterogeneity of soil water and provided water for neighboring trees. Nocturnal sap flow in P. orientalis and Q. variabilis facilitated the storage of water in the trunk. The water used for storage in both species comprised 6–7% of the total quantity and therefore, should be considered in water balance models.

show abstract

Section: Water Migration and Usesupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Water Storage of Plants Cannot Be Ignored During The Process of Water Movement

Liu

Wei

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…By analysis of the water level of XSTD, SQYFP, and SQYFP, we found that XSTD possessed a stable and relatively abundant water level of 2 m, and the water level in SQYFP was 2-4 m and varied greatly with the seasons. This result indicates that proper soil moisture is necessary for the survival of Populus euphratica seedlings [19,20]. In addition, as seedlings on windward slopes face more windy weather, this increases the intensity of dehydration in seedling leaves [6].…”

Section: Discussionmentioning

confidence: 97%

Technological Breakthrough for the Afforestation of Populus euphratica in the Mu Us Desert in China

Tuo¹,

Gao²,

Dong

2021

Sustainability

View full text Add to dashboard Cite

The Mu Us Desert (MUD) is one of the four largest sandy lands in China. On 22 April 2020, the Shaanxi Forestry Bureau announced that the desertification land control rate in Yulin reached 93.24%, which means that the Mu Us Desert was about to “disappear” from the territory of Shaanxi. However, the problem of biological diversity, mostly for Pinus sylvestris and shrubs in the Mu Us Desert, remains serious. In order to consolidate the current forest conservation efforts, Populus euphratica has been considered an ideal candidate since the 1950s. However, the low survival rate and conservation rate of Populus euphratica in the MUD led us to perform further large-scale introduction for over 70 years. In this study, by using root control seedling technology, the survival and the conservation rate of Populus euphratica were increased to more than 90%. This study makes possible the introduction of Populus euphratica in the MUD, and the successful introduction of Populus euphratica will provide a new barrier for forest ecosystem stability in the desertification control project in the Yulin area.

show abstract

“…The dimensionless REW is the relative effective water content of the soil that demonstrates values from 0 to 1. Plants are usually considered under soil water stress when REW < 0.4 ( Chen et al, 2020b ).…”

Section: Methodsmentioning

confidence: 99%

“…In addition, global climate observations demonstrated that land warms faster at night than during the day, and this trend can lead to an increase in plant water requirement at night ( Zeppel et al, 2015 ). The nighttime sap flow movement in plants can facilitate the transport of nutrients and oxygen for plant growth, which in turn affects plant growth status and productivity ( Chen et al, 2020b ; Liu et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Sap Flow Velocity in Fraxinus pennsylvanica in Response to Water Stress and Microclimatic Variables

2022

View full text Add to dashboard Cite

In arid and semiarid regions with water shortage, forestry development is limited by water availability. Understanding how tree sap flow responds to water stress and microclimatic variables is essential for the management of trees and the understanding of the eco-physiological properties of trees in arid areas. In the city of Tianjin in northern China, we measured the sap flow of Fraxinus pennsylvanica, a widely distributed urban greening tree species in semiarid regions of China. We measured the sap flow in four F. pennsylvanica trees over 6 months (April–September 2021), using a thermal diffusion probe method, and simultaneously monitored microclimatic variables and soil moisture. Results indicated that high nighttime sap flow velocity might be produced under the water stress condition. In addition, the nighttime sap flow velocity under the water stress condition was more susceptible to the combined effects of meteorological factors at night. The daytime sap flow velocity exerted a highly significant positive effect on the nighttime sap flow velocity during the whole research period, and the model fit was higher in the early growing season than that in the late growing season (early growing season: R2 = 0.51, P < 0.01; late growing season: R2 = 0.36, P < 0.01). Vapor pressure deficit had a positive effect on daytime sap flow. However, net vapor pressure deficit restrained daytime sap flow velocity when the intercorrelation between the microclimatic variables was removed. Our study highlights that drought areas perhaps have higher nighttime sap flow and that more emphasis should be placed on nighttime sap flow and the response of nighttime sap flow to microclimatic variables. In addition, the influence of other microclimatic variables on vapor pressure deficit needs to be considered when analyzing the relationship between daytime sap flow and vapor pressure deficit. An increase in net VPD can suppress the daytime sap flow.

show abstract

Biophysical controls on nocturnal sap flow in plantation forests in a semi-arid region of northern China

Cited by 47 publications

References 90 publications

Water Storage of Plants Cannot Be Ignored During The Process of Water Movement

Water Storage of Plants Cannot Be Ignored During The Process of Water Movement

Technological Breakthrough for the Afforestation of Populus euphratica in the Mu Us Desert in China

Sap Flow Velocity in Fraxinus pennsylvanica in Response to Water Stress and Microclimatic Variables

Contact Info

Product

Resources

About