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| Saturated Hydrocarbon Fractions Root Exudates of Wheat and Alfalfa |
| Yue Bin1,2, Chang Guohua2, Zhang Renzhi1 |
1. College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China;
2. School of Chemistry and Environmental Science, Lanzhou City University, Lanzhou 730070, China |
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Abstract For studying on the characteristics of organic substances in rhizospheric soil of advanced plants,the dissoluble organic substances in rhizospheric soil from wheat land and alfalfa (Medicago sativa) field were analyzed by the pole chromatographic composition separation(GC/MS). Three series of biomarkers (n-alkanes, isoprenoid alkanes and esters) were detected in the non-polar distillate. The odd-even preference (OEP) of n-alkane, the ratio of n-alkanes ∑C22-/∑C23+ and pristane/phytane ratio (Pr/Ph) of biomarkers in the three fields (wheat land, alfalfa field and the border region) were analyzed. The main peak of n-alkane in wheat land and alfalfa field samples were both nC31, and the order of OEP value of n-alkane was the alfalfa>the border region>the wheat >1.4, and then the order of the n-alkanes ∑C22-/∑C23+ was the wheat>the border region>the alfalfa. Lastly, the sequence of the pristane/phytane ratio was the alfalfa>the border region>the wheat. The results showed that the evolution degree of organic substance from wheatland and alfalfa field was different and the former was higher than the latter.
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Received: 26 March 2013
Published: 20 September 2014
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Corresponding Authors:
张仁陟（Email：zhangrz@gsau.edu.cn）
E-mail: zhangrz@gsau.edu.cn
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2014, Vol. 34 
