| Effects of sorghum\|peanut intercropping on root traits and soil microorganisms of single\|row crops |
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| DOI：10.7606/j.issn.1000-7601.2022.04.06 |
| Key Words: sorghum\|peanut intercropping root traits soil microorganism |
| Author Name | Affiliation | | WANG Jiaxu | Sorghum Research Institute, Liaoning Academy of Agricultural Sciences，Shenyang, Liaoning 110161, China | | ZHU Kai | Sorghum Research Institute, Liaoning Academy of Agricultural Sciences，Shenyang, Liaoning 110161, China | | ZHANG Zhipeng | Sorghum Research Institute, Liaoning Academy of Agricultural Sciences，Shenyang, Liaoning 110161, China | | ZHANG Kuangye | Sorghum Research Institute, Liaoning Academy of Agricultural Sciences，Shenyang, Liaoning 110161, China | | KE Fulai | Sorghum Research Institute, Liaoning Academy of Agricultural Sciences，Shenyang, Liaoning 110161, China |
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| Abstract: |
| The sorghum variety Liaonian No. 3 and peanut variety Fuhua 18 were used as test crops to study the differences in soil microbial community composition and structural characteristics under sorghum\|peanut intercropping mode with three treatments of single cropping sorghum, single cropping peanut and sorghum\|peanut intercropping (row ratio 4∶4). The single cropping sorghum and peanut were named S and P. The sampling positions of intercropping treatment were adjacent rows and interval rows, and sorghum and peanut were named S1 and S2 and P1 and P2. The result showed that the yield of intercropping sorghum was significantly higher than that of single cropping sorghum, and the peanut yield decreased under the same planting area. The yield of intercropping sorghum increased by 36.14%, and the yield of peanut decreased by 12.86%. The land equivalent ratio of sorghum\|peanut intercropping increased by 12.0 %. Compared with monoculture, the root length, root volume, root surface area and root active absorption area of S1 increased by 28.01%, 12.86%, 18.53% and 18.42%.These values increased by 39.87%, 66.67%, 47.94% and 21.43% in P2. A total of 2 825 microbial populations were detected in rhizosphere soil of sorghum population, and 2 826 were detected in peanut population. Chao1 value of sorghum intercropping was significantly higher than that of single cropping with S1 and S2 increased by 8.10 % and 8.23 % and P2 and P1 by 7.70% and 4.23%. The observed OTUs of sorghum\|peanut intercropping were significantly higher than those of single cropping. The Shannon index of peanut P2 increased by 27.60%. The Simposon index of intercropping sorghum S1 and S2 was significantly higher than that of single cropping sorghum. The common dominant phylum of each treatment was Proteobacteria, and there was a significant positive correlation between the dominant phylum and root traits. Principal component analysis (PCA) and redundancy analysis (RDA) showed that the soil microbial community structure was affected by root length, root volume and root surface area. The soil microbial function characteristics were higher in the intercropping than that of the single cropping. When sorghum\|peanut intercropping (row ratio 4∶4), sorghum was the dominant crop and peanut was the weak crop. The intercropping system significantly improved the growth and development of the root system of adjacent rows of sorghum as well as the functional characteristics of the soil microbial community. |
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