CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2022, Vol. 44 ›› Issue (6): 1296-1306.doi: 10.19802/j.issn.1007-9084.2021283

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Effects of strip intercropping of maize and peanut on nitrogen uptake and soil microbial community diversity

Qi-qi DONG1(), Yang YUAN1, Qi DU2, Zhen-hua LIU1, Xiao-long SHI1, Ke-zhao ZHANG1, Dong-ying ZHOU1, Xu YANG1, Xiao-guang WANG1, Chun-ji JIANG1, Xi-bo LIU1, Feng GUO3, Xin-hua ZHAO1(), Hai-qiu YU1()   

  1. 1.Peanut Research Institute, Shenyang Agricultural University, Shenyang 110866, China
    2.Institutes of Coastal Agriculture, Hebei Academy of Agriculture and Forestay Sciences, Tangshan 063299, China
    3.Shandong Academy of Agricultural Sciences,Jinan 250100, China
  • Received:2021-11-03 Online:2022-12-25 Published:2022-11-24
  • Contact: Xin-hua ZHAO,Hai-qiu YU E-mail:QiqiDong77_syau@163.com;xinhua_zhao@syau.edu.cn;yuhaiqiu@syau.edu.cn;xinhua_zhao@syau.edu.cn


In order to explore the nitrogen uptake and utilization and the characteristics of soil microbial community under the intercropping of maize and peanut, three treatments were set up for sole maize (SM), sole peanut (SP) and intercropping of maize and peanut (IMP). The nitrogen absorption and utilization under different planting modes were systematically analyzed, and 16S/ITS sequencing technology were used to clarify the changes in soil bacterial/fungal community structure under the intercropping of maize and peanut. The results showed that side-row maize of intercropping had a marginal advantage, the dry matter weight and nitrogen accumulation was higher than the middle of intercropping maize and sole maize. The diversity and richness of bacterial and fungal in intercropped maize and the shared soil of intercropping maize and peanut was decreased, while the diversity and richness of fungal in intercropped peanut was increased, and the most enrichment of beneficial bacterial were increased, such as Proteobacteria, Basidiomycetes and Ascomycetes. There was complex correlation between bacteria and fungi. The Proteobacteria was positively correlated with Ascomycetes. The intercropping enriched the functional diversity of bacterial, and the enrichment of bacterial and saprophytic fungal involved in the amino acid transport and metabolism and carbohydrate transport and metabolism improved the nutrient uptake and promoted the growth and development of plants. In conclusion, intercropping of maize and peanut optimized the soil microbial community structure, promoted plant nutrient absorption and dry matter accumulation, which provided a scientific basis for the mutual promotion of nitrogen absorption of the maize and peanut intercropping.

Key words: maize, peanut, strip intercropping, the shared soil of intercropping maize and peanut, nitrogen uptake and utilization, 16S/ITS

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