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| Nabkha Morphological Characteristics and Sand Fixing Capacity of Artemisia sphaerocphala in the Southeastern Edge of the Ulan Buh Desert |
| Gao Yong1, Dang Xiaohong1, Yu Yi2, Wang Ji1, Wang Shan1, Yuan Weijie2, Zhang Xiwei1 |
1. School of Ecology and Environmental Science, Inner Mongolia Agriculture University, Hohhot 010018, China;
2. International Center for Bamboo and Rattan, Beijing 100102, China |
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Abstract Artemisia sphaerocphala nabkha is a kind of typical desert nabkha widely distributed in the southeastern edge of the Ulan Buh desert. Shrub and nabkha morphological parameters of A. sphaerocphala were measured to explore the relationship between morphological development, sand fixing capacity and shrub morphological parameters. The results show that the shrub height increases in logarithmic curve line with increasing shrub radius. The shrub grows fast in initial stage and then gradually turns to be stable, and its growing velocity in horizontal direction is faster than that in vertical direction. The nabkha radius and height increases with increase of shrub radius and height with significantly linear relationship. The nabkha horizontal development is determined by shrub crown width and the vertical development is determined by shrub height. With the increase of aboveground fresh biomass of A. sphaerocphala shrub, the bottom area, height, volume and sand fixing capacity of the nabkha show very significantly linear changes (p<0.01). The nabkha volume is large when shrub volume is large, and the sand fixing capacity is high. The difference of sand fixing efficiency among different size shrubs is significant (p<0.05). There is a significant correlation between blown sand width (y) and length (x) in the leeward side of A. sphaerocphala shrub (R2=0.9917), and the linear regression equation was y=-19.654x+122.41.The blown sand nearly disappears in the distances of 6-7 heights from the A. sphaerocphala shrub in the leeward side.
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Received: 10 June 2014
Published: 20 January 2015
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2015, Vol. 35 
