[1]MENG Ming,GU Junlong,YANG Xinguo,et al.Effect of Morphological Degradation on Stem Flow in Canopy of Caragana intermedia[J].Research of Soil and Water Conservation,2019,26(05):202-209.
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Effect of Morphological Degradation on Stem Flow in Canopy of Caragana intermedia
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 05
Page number:
202-209
Column:
Public date:
2019-09-06
- Title:
- Effect of Morphological Degradation on Stem Flow in Canopy of Caragana intermedia
- Keywords:
- Caragana intermedia; stem flow; small precipitation; desert grassland; morphologic degradation
- CLC:
- S718.4
- DOI:
- -
- Abstract:
- In order to deeply understand the relationship between precipitation distribution and the occurrence of stem flow in shrub of Caragana intermedia forest in degraded desert steppe, selection of Caragana intermedia banded forest planted in experimental plot, the natural thickets (healthy group) and adjacent typical degraded thickets (degenerated group) of Caragana intermedia community were taken as the research objects, based on the stem flow data of small and meso-scale precipitation events (0~15 mm) obtained from 2016 to 2017, the typical degraded shrubs (degraded group) and the natural scattered Caragana intermedia (healthy group) in desert steppe were selected, the differences in stem flow of different shrubs, the distribution of stem flow with precipitation, and the regression relationship between stem flow and precipitation characteristics were analyzed. The results showed that:(1) the stem flows of healthy and degraded groups were 14.42 mm and 15.9 mm, respectively, trunk and stem flow accounted for 8.06% and 7.91% of the total rainfall, respectively, and there was no significant difference between them; (2) as the rainfall level increased, the stem flow and stem flow percentage of the healthy group and the degraded group showed an increasing trend; in the healthy group, the variation coefficient of stem flow and stem flow percentage decreased first and increased later, while the variation coefficient of stem flow and stem flow percentage decreased in the degraded group; (3) the relationship between stem flow and rainfall, rainfall duration and rainfall intensity in healthy and degraded groups can be fitted with a linear function, and the relationship between stem flow percentage and rainfall, rainfall duration and rainfall intensity can be fitted with logarithmic function. In general, the significant water confluence effect in the middle Caragana intermedia was observed, but no significant effect on the stem flow was found due to the morphological degeneration of shrubs.
- References:
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1900-01-01