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《Acta Prataculturae Sinica》 2008-01
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Effect of Puccinellia tenuiflora growth on nitrogen nutrition in alkalized soil

SUN Guo-rong1,2,PENG Yong-zhen2,3,YUE Zhong-hui4,CHEN Gang1,YAN Xiu-feng5,NI Hong-wei6(1.College of Bioscience and Biotechnology,Yangzhou University,Yangzhou 225009,China;2.School of Municipal and Environmental Engineering,Harbin Institute of Technology,Harbin 150090,China;3.College of Environmental and Energy Engineering,Beijing Polytechnic University,Beijing 100022,China;4.Department of Biology,Harbin Normal University,Harbin 150080,China;5.College of Life Science,Northeast Forestry University,Harbin 150040,China;6.Institute of Natural Resources,Heilongjiang Academy of Sciences,Harbin 150040,China)  
The total nitrogen content,alkali-soluble nitrogen content,ammonification intensity,nitrogen fixation intensity,urease activity, protinase activity,nitrite reductase activity and nitrate reductase activity increased in alkalized soil in which Puccinellia tenuiflora was grown(Pt soil) compared with alkali spot soil and the differences depended on the number of years for which it was grown.The total nitrogen content of the Pt soil for different years was significantly different from that of the alkali spot soil,and the alkali-soluble nitrogen content when P.tenuiflora was grown for three or four years was significantly different from the alkali spot soil,while the ammonification intensity,nitrogen fixation intensity,urease,proteinase,nitrite reductase and nitrate reductase activity of the three,four or five year Pt soils were significantly different from that of the alkali spot soil.All of the above indicated that the growth of P.tenuiflora improved the nitrogen nutrition status of alkalized soil with the best effect when grown for 3-5 years.
【Fund】: 国家自然科学基金(30270234和30770344);; 国家863项目(2007AA021402);; 国家自然科学基金重点项目(50138010)资助
【CateGory Index】: S156.4
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