[1]Dang Caiyu,Ma Lan,Cui Yongsheng,et al.Transpiration Characteristics and Environmental Response of Typical Plants in Robinia pseudoacacia Forest in Loess Area of Western Shanxi Province[J].Research of Soil and Water Conservation,2024,31(06):243-251.[doi:10.13869/j.cnki.rswc.2024.06.027]
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Transpiration Characteristics and Environmental Response of Typical Plants in Robinia pseudoacacia Forest in Loess Area of Western Shanxi Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 06
Page number:
243-251
Column:
Public date:
2024-12-10
- Title:
- Transpiration Characteristics and Environmental Response of Typical Plants in Robinia pseudoacacia Forest in Loess Area of Western Shanxi Province
- Keywords:
- Robinia pseudoacacia forest; transpiration; soil moisture content; meteorological factors; loess area of western Shanxi
- CLC:
- Q948.1; S718.55
- DOI:
- 10.13869/j.cnki.rswc.2024.06.027
- Abstract:
- [Objective]The aims of this study are to reveal the transpiration and water consumption pattern of typical plants(trees, shrubs, herbs)in Robinia pseudoacacia forests in the loess area of western Shanxi, and to clarify the dominant environmental factors of transpiration water consumption in Robinia pseudoacacia plantation forests in this area. [Methods]Li-6400XT portable photosynthesizer was used to measure the transpiration process of the plants, and the data of soil moisture and meteorological factors were synchronously collected to analyze the characteristics of the transpiration of typical plants in Robinia pseudoacacia forests and their environmental responses. [Results](1)In July, the diurnal variation characteristics of transpiration rate of Robinia pseudoacacia and Festuca elata showed bimodal curves, and the diurnal variation characteristics of transpiration rate of Periploca sepium showed unimodal curves. The diurnal variation characteristics of transpiration rate of the three plants in September showed a unimodal curve, and there was an obvious change pattern.(2)The average soil volume water content of 0—20 cm soil layer during the study period was between 9.37% and 18.09%, and the average soil moisture contents were 12.16% on the upslope and 15.43% on the downslope. The response of the transpiration rate of Robinia pseudoacacia and Periploca sepium to soil water content on the upslope was greater than that on the downslope, while the transpiration rate of Festuca elata on the upslope was less responsive to soil water content than that on the downslope.(3)On the upslope, photosynthetically effective radiation was the dominant factor driving transpiration of forest stands. On the downslope, the dominant factor of each vegetation was different. The dominant factor of Robinia pseudoacacia was air relative humidity. The dominant factor of Periploca sepium was photosynthetically effective radiation. The dominant factor of Festuca elata was atmospheric CO2 concentration.(4)During the entire research period, a stepwise regression fitting was established. The stepwise regression equations established for Robinia pseudoacacia and Periploca sepium could more accurately simulate transpiration rate, while the effect of Festuca elata was not ideal. [Conclusion]In the loess area of western Shanxi, the transpiration characteristics of different plants differ significantly, and the environmental factors affecting the transpiration characteristics of each plant vary according to the slope position, so the role of slope position as well as environmental factors should be considered comprehensively in the process of vegetation construction.
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Last Update:
2024-12-10