| Contrastive study on soil water content characters of Artemisia arenaria and Calligonum mongolicunl shrubs in artificial sand-fixation area in Gurbantunggut Desert of Northwest China |
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| DOI：10.7606/j.issn.1000-7601.2011.04.30 |
| Key Words: artificial sand-fixation area Artemisia arenaria Calligonum mongolicunl soil water content bulk density fertile island effec
t Gurbantunggut Desert |
| Author Name | Affiliation | | HOU Jianxiu | Engineering Construction Management Bureau for Ertix River Basin Development in Xinjiang, Urumqi 830000, China | | ZHANG Yuanming | Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China | | TAO Ye | Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China
Graduate University of Chinese Academy of Sciences, Beijing 100049, China | | QUAN Yongwei | Engineering Construction Management Bureau for Ertix River Basin Development in Xinjiang, Urumqi 830000, China | | LI Mingjie | Engineering Construction Management Bureau for Ertix River Basin Development in Xinjiang, Urumqi 830000, China | | DU Xiaohu | Engineering Construction Management Bureau for Ertix River Basin Development in Xinjiang, Urumqi 830000, China |
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| Abstract: |
| The natural Artemisia arenaria and Calligonum mongolicunl shrubs were selected in five-year sand fixation area beside the desert canal in Gurbantunggut Desert, Northwest China. According to shrub crown size, five horizontal distance levels and four vertical depth levels were chosen to contrastively study the soil water content (SWC) of the two shrubs. The result showed that the SWC values increased with the soil layer depth, the AWC values of two lower layers (20～40 cm, 40～60 cm) were significantly (P<0.05) more than the two upper layers (0～10 cm, 10～20 cm), while the other AWC were not markedly different. There were no clear differences at every distance at the soil layers of the two upper levels of A. arenaria shrub and total four of C. mongolicunl shrub. While the RWC of mid-shrub (50 cm) at the two lower layers of A. arenaria were the most, and it was significantly (P<0.05) different from the shrub edge (80 cm). The soil bulk density values at the upper layers of the two shrubs were slightly higher than those at the two lower layers, but there were no evident differences between the two shrubs, different distances and different layers. It was found that A. arenaria shrub with dense branches had a certain “fertile island effect” of water, compared to C. mongolicunl shrub which had sparse branches. This effect was beneficial to the growth and diffusion of A. arenaria population, maybe it was one of the important factors to cause the distribution difference of the two shrubs and to widely distribute in the artificial sand-fixation area for A. arenaria population. |
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