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Forskningsartikel2020Vetenskapligt granskad

Combined addition of chemical and organic amendments enhances plant resistance to aboveground herbivores through increasing microbial abundance and diversity

Jiang, Linhui; Bonkowski, Michael; Luo, Ling; Kardol, Paul; Zhang, Yu; Chen, Xiaoyun; Li, Daming; Xiao, Zhenggao; Hu, Feng; Liu, Manqiang


Two greenhouse experiments using soils from long-term field plots were carried out to test whether and how soil factors modulated by organic amendments feed back to rice plant growth and defense against an aboveground herbivore, the planthopperNilaparvata lugens. Using factorial combinations of sterilized soil and soil inocula obtained from chemically amended plots (i.e., control treatment) or chemically plus organically amended plots (i.e., organic treatment), we disentangled the effects of biotic and abiotic soil properties on plant and planthopper performance. We found that, compared with abiotic soil properties, soil biological factors were the main drivers in regulating plant growth performance. Specifically, soil biota that are shaped by the organic treatment had high microbial abundance and diversity and enhanced rice plant tolerance (i.e., increasing plant total biomass) and resistance (i.e., decreasing amino acid and sugar concentrations) to planthoppers. Moreover, the organic treatment simultaneously increased plant growth and defense against planthoppers, which could be explained by high soil nutrient availability driven by soil biota. Our results demonstrate the importance of synergistic effects of soil biota and soil abiotic factors on plant growth and resistance to herbivory. These findings are important for better understanding the mechanisms and impacts of ecological intensification as well as the potential of steering soil communities to reduce the use of chemical fertilizers and pesticides and further optimize crop production.


Organic amendment; Soil biodiversity; Sustainable agriculture; Above; and belowground; Herbivore; Plant defense

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Biology and Fertility of Soils
2020, Volym: 56, nummer: 7, sidor: 1007-1022
Utgivare: SPRINGER

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