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《Acta Pratacultural Science》 2005-03
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The character of phosphorus concentrations in rhizosphere soil of super-xerophytic shrubs

MA Bin, ZHOU Zhi-yu, ZHANG Cai-ping, LI Xue-rui (College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China)  
In this paper we investigated and compared the total phosphorus and available phosphorus concentrations in non-rhizosphere and rhizosphere soils of five super-xerophytic shrubs in the Alashan desert. The results from this study indicated that there were consistently higher total phosphorus and available phosphorus concentrations in the rhizosphere soils than in the non-rhizosphere soils of Zygophyllum xanthoxylum、Ceratoides holmgern、Atraphaxis bracteate、Tetraena Mongolica. Reaumuria soongorica showed a higher total phosphorus concentration in rhizosphere than in non-rhizosphere soils, although was shown to have a lower available phosphorus concentration in the rhizophere compared with the non-rhizosphere soils. Regression analyses indicated that there was a significant correlation between the total phosphorus and available phosphorus concentrations in non-rhizosphere soil. In contrast, rhizosphere soils showed no significant relationship between the total phosphorus and available phosphorus concentrations.
【Fund】: 国家重点基础研究发展规划项目(G2000048705);; 国家自然科学基金西部环境研究项目计划(90102011);; 国家自然基金重点项目(39730100)资助。
【CateGory Index】: S812.2
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