| Biology and Soil |
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| Seedling Growth Dynamic of Haloxylon ammodendron under Different Water Supply |
| LIU Guo-jun1,2, ZHANG Xi-ming1, L Chao-yan1,3, SUN Hong-ye4, WU Jun-xia1,3, DENG Chao-zhou1,3 |
1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2.Cele National Station of Observation & Research for Desert Grassland Ecosystem, Cele 848300, Xinjiang, China;
3.Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
4.XinJiang Center for Environment Engineering Appraisal, Urumqi 830011, China |
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Abstract In the natural condition, the responses of seedling growth of Haloxylon ammodendron to melting snow change are investigated by artificially controlling water supply at five levels of 10 mm, 20 mm, 40 mm, 60 mm and 80 mm.Results show that the quota of water supply significantly affects seedling height, root length, seedling dry weight, root dry weight and stem base diameter. At some stages of the growing season, the responses of increments of seedling height, root length, seedling dry weight, and root dry weight and stem base diameter to water supply are significant, and the response of root/shoot ratio is also significant. It is more benefit to survival and growth of H. ammodendron with water supply of 10~80 mm. Throughout the growing season, the length of vertical root of H. ammodendron is 3~5 times the height of shoot, and the growth speed of the vertical root is 2~6 times the growth speed of shoot. The rapid growth of root is decisive to survival and growth of seedlings of H. ammodendron.
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Received: 07 May 2011
Published: 20 March 2012
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2012, Vol. 32 
