[1]WANG Yuan,WEI Jiangsheng,ZHOU Mei,et al.Response of Sap Flow of Betula platyphylla to Soil Moisture in Southern Greater Xing'an Mountains[J].Research of Soil and Water Conservation,2020,27(04):128-133.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 04
Page number:
128-133
Column:
目次
Public date:
2020-06-20
- Title:
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Response of Sap Flow of Betula platyphylla to Soil Moisture in Southern Greater Xing'an Mountains
- Author(s):
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WANG Yuan1, WEI Jiangsheng1,2, ZHOU Mei2, ZHAO Pengwu2, LIU Bingbing2
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(1.Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot 010018, China; 2.National Positioning Observation and Research Station of Saihanwula Forest Ecosystem, Chifeng, Inner Mongolia 025150, China)
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- Keywords:
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Southern Greater Xing'an Mountains; Betula platyphylla; sap flow density; soil moisture
- CLC:
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S714
- DOI:
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-
- Abstract:
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In order to clarify the response of changes in stem sap flow of Betula platyphylla with different diameter classes to different soil water conditions, and provide reference for revealing the utilization strategies of Betula platyphylla for soil water and the study of water cycle mechanism in the process of ecological restoration in this area, from early May to late September 2017, the sap flow of Betula platyphylla in Saihanwula area, southern Greater Xing'an Mountains, Inner Mongolia, was observed by using Granier thermal diffusion sap flow probe, and the meteorological factors such as solar radiation, air temperature, air relative humidity and rainfall were monitored synchronously. The response of stem sap flow characteristics of Betula platyphylla to meteorological factors and soil moisture dynamics was analyzed. The results showed that the diurnal variation of sap flow density in non-rainy weather was higher in the daytime and lower in night when soil moisture content was relatively sufficient and relative deficient, which was consistent with the variation of solar radiation and air vapor pressure deficit; under the same water condition, the sap flow densities of the two diameter classes was significantly different, the sap flow density of large diameter class was higher than that of the small diameter class; under the same diameter class, the sap flow density under relatively sufficient soil water content was greater than that under the relatively deficient soil water content; Saturation exponential curve was used to fit the sap flow density with solar radiation and air vapor pressure deficit, respectively, which can better reflect the response of sap flow density to meteorological factors. The stomatal transpiration of Betula platyphylla was highly sensitive to the change of soil water content under different soil water contents.