[1]WANG Yixin,FENG Tianjiao,XIAO Huijie,et al.Characteristics of Sap Flow Rate of Nitraria tangutorum Under Drought Stress and Different Plant Height and Basal Diameter[J].Research of Soil and Water Conservation,2023,30(05):234-240,249.[doi:10.13869/j.cnki.rswc.2023.05.039.]
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Characteristics of Sap Flow Rate of Nitraria tangutorum Under Drought Stress and Different Plant Height and Basal Diameter
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 05
Page number:
234-240,249
Column:
Public date:
2023-08-10
- Title:
- Characteristics of Sap Flow Rate of Nitraria tangutorum Under Drought Stress and Different Plant Height and Basal Diameter
- Keywords:
- Hetao irrigation area; Nitraria tangutorum; sap flow; drought stress; vegetation morphology
- CLC:
- S728.4
- DOI:
- 10.13869/j.cnki.rswc.2023.05.039.
- Abstract:
- [Objective] The differences in the sap flow of Nitraria tangutorum in different plant height base diameters in the desert environment of Inner Mongolia were revealed, and the adaptation of different forms of Nitraria tangutorum to arid environment was elucidated, and the planting of Nitraria tangutorum in desert oasis vegetation restoration in arid area was provided. [Methods] Nitraria tangutorum of the tall plant height group(HS)and coarse basal diameter group(BD)were selected in Wulanbuhe desert, and water separation treatment(CG)was simulated, insitu observation was used to measure and analyze the change of sap flow rate and its relationship with environmental factors during growing season. [Results](1)The sap flow rate of Nitraria tangutorum was in the order: August>July>June>September>May on the monthly scale, and the sap flow rate of Nitraria tangutorum in water separation treatment(WS)was larger than that in non water tight treatment(NW), the mean values of sap flow rate were 1.021 g/hand 0.387 g/h, respectively. The sap flow rate of Nitraria tangutorum(LS)with large basal diameter was larger than that with small basal diameter and high plant(SH), the mean flow rates were 0.472 g/h and 0.261 g/h, respectively.(2)Under the condition of long-term soil moisture deficiency, the sap flow rate was positively correlated with air temperature(Ta)and wind velocity(WVEL), and negatively correlated with photosynthetic effective radiation(PAR), but not significantly correlated with air humidity(Rh), the influence degree of environmental factors on sap flow rate followed the order: PAR>Ta>VPD>WVEL>Rh, and soil water content in the depth of 30—150 cm had significant positive correlation with sap flow rate of Nitraria tangutorum.(3)The regression equation between the sap flow rate of Nitraria tangutorum and environmental factors showed that the sap flow rate of LS group was more affected by meteorological factors than that of SH group, and the liquid flow rate of WS group was only affected by the soil moisture content of 30—50 cm soil layer. [Conclusion] Dwarf Nitraria tangutorum with large base diameter is more suitable for local arid climatic conditions than high Nitraria tangutorum with smaller base diameter, and Nitraria tangutorum in large base diameter and dwarf form is more suitable for survival in water-scarce environments.
- References:
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Last Update:
2023-08-10