Effects of intercropping and Rhizobium inoculation on yield and rhizosphere bacterial community of faba bean (Vicia faba L.) |
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Authors: | Nan Nan Zhang Yan Mei Sun Long Li En Tao Wang Wen Xin Chen Hong Li Yuan |
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Institution: | 1. State Key Lab for Agrobiotechnology, Key Laboratory of Agro-Microbial Resource and Application, Ministry of Agriculture, Center of Biomass Engineering, College of Biological Sciences, China Agricultural University, Beijing, 100193, China 2. College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China 3. Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, 11340, Federal District, Mexico
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Abstract: | The effects of intercropping with maize and Rhizobium inoculation on the yield of faba bean and rhizosphere bacterial diversity were analyzed by terminal restriction fragment
length polymorphism, amplified 16S rDNA restriction analysis (ARDRA), and 16S rDNA sequencing. The results showed that intercropping
but not Rhizobium inoculation significantly increased the faba bean yield. Probably the relatively high level of native rhizobia in soil annulled
the effect of rhizobia inoculation. ARDRA results showed that intercropping did not affect bacterial diversity whereas Rhizobium inoculation decreased bacterial diversity. The canonical correspondence analysis showed that the composition of bacterial
community was changed apparently by intercropping, and there was a positive correlation (P = 0.724) between faba bean yields and intercropping and an apparent correlation (P = 0.648) between intercropping and total N. The available content of K and P had a lower effect on the bacterial community
composition than did the total N content, Rhizobium inoculation, and microbial biomass C. Rhizobium inoculation negatively correlated with microbial biomass C (P = −0.827). These results revealed a complex interaction among the intercropped crops, inoculation with rhizobia, and indigenous
bacteria and implied that the increase of faba bean production in intercropping might be related to the modification of rhizosphere
bacterial community. |
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