| Biology and Soil |
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| Effects of Separate and Mutual Application of Na and Si on Drought Resistance of Haloxglon ammodendron |
| KANG Jian-jun1,2, WANG Suo-min1, YANG Zi-hui3 |
1.College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
2.Gansu Research Academy of Forestry Science and Technology, Lanzhou 730020, China;
3.Minqin National Station for Desert Steppe Ecosystem Studies, Minqin 733300, Gansu, China |
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Abstract We studied pot cultivated Haloxylon ammodendron’s growth, physiological changes and drought resistance under NaCl, H2SiO3 and NaCl+H2SiO3 treatments. Results show that 0.3 g·kg-1 NaCl, 0.2 g·kg-1 H2SiO3 or 0.3 g·kg-1 NaCl+0.1 g·kg-1 H2SiO3 treatments can effectively promote the growth and improve the drought resistance ofHaloxylon ammodendron. Compared with that under no NaCl treatment, Haloxylon ammodendrons height, crown diameter and fresh weight increased by 42%, 91% and 62% respectively under 0.3 g·kg-1 NaCl treatment, and its main stem diameter, main root diameter and main root length increased by 40%, 39% and 23%, respectively. Compared with that under no H2SiO3 treatment, Haloxylon ammodendrons height, crown diameter and fresh weight increased by 36%, 45% and 27% respectively under 0.2 g·kg-1 H2SiO3 treatment, and its main stem diameter, main root diameter and main root length increased by 23%, 23% and 20%, respectively. Compared with that under 0.3 g·kg-1 NaCl treatment, Haloxylon ammodendrons height, crown diameter, fresh weight and main root length increased by 9%, 10%, 17% and 12% respectively under 0.3 g·kg-1 NaCl+0.1 g·kg-1 H2SiO3 treatment. Compared with that under 0.1 g·kg-1 H2SiO3 treatment, Haloxylon ammodendrons height, crown diameter and fresh weight increased by 28%, 76% and 68% respectively under 0.3 g·kg-1 NaCl+0.1 g·kg-1 H2SiO3 treatment, and its main stem diameter, main root diameter and main root length increased by 30%, 32% and 27%, respectively. It suggests that moderate level of NaCl+H2SiO3 interaction can more effectively promote growth ofHaloxylon ammodendron and improve drought resistance ofHaloxylon ammodendron than separate application of NaCl or H2SiO3.
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Received: 25 October 2011
Published: 20 May 2012
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2012, Vol. 32 
