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Effects of long-term cultivation of transgenic Bt rice (Kefeng-6) on soil microbial functioning and C cycling

文献类型： 外文期刊

作者： Lee Zhaolei 1 ; Bu Naishun 2 ; Cui Jun 1 ; Chen Xueping 3 ; Xiao Manqiu 1 ; Wang Feng 4 ; Song Zhiping 1 ; Fang Changming 1 ;

作者机构： 1.Fudan Univ, Inst Biodivers Sci, Key Lab Biodivers & Ecol Engn, Minist Educ, Shanghai, Peoples R China

2.Liaoning Univ, Sch Environm Sci, Shenyang, Peoples R China

3.Shanghai Univ, Sch Environm & Chem Engn, Shanghai, Peoples R China

4.Fujian Acad Agr Sci, Fujian Prov Key Lab Genet Engn Agr, Fuzhou, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2017 年 7 卷

页码：

收录情况： SCI

摘要： Understanding how soil ecosystem responds to transgenic Bacillus thuringiensis (Bt) rice is necessary for environmental risk assessment. While the influences of short-term cultivation of Bt rice on soil properties have been reported previously, little is known about the long-term effects of Bt rice on soil ecosystems. In this study, soil samples were taken from a long-term rice cultivation site in Fujian Province, China, where transgenic Bt rice (Kefeng-6) and its non-Bt parent breed (Minghui-86) had been continuously cultivated for 8 years. Soil Bt protein concentration and a total of 16 variables were analyzed to assess potential risks of soil health under Bt rice cultivation. The results revealed that soil Bt protein is unlikely to accumulate after Bt rice cultivated in the field, and no consistently significant changes were observed in soil enzymatic activities (catalase, dehydrogenase, acid phosphatase, and urease), microbial biomass (microbial carbon and nitrogen), total organic carbon, decomposition (soil respiration, Q(10), and qCO(2)), soil nitrogen and phosphorus contents. Due to a local tradition that aboveground biomass was removed after harvest, the increased net primary productivity by Bt rice cultivation did not significantly change soil C cycling. Results of this study suggested that on the aspects of soil microbial functioning and C cycling, long-term cultivation of Bt rice is unlikely to result in significant effects on soil health.

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