Intercropping Acacia mangium stimulates AMF colonization and soil phosphatase activity in Eucalyptus grandis

  • Daniel Bini State University of Central-West of Paraná; Dept. of Biological Science
  • Cristiane Alcantara dos Santos Campo Real College; Dept. of Agronomic Engineering
  • Mylenne Calcciolari Pinheiro da Silva University of São Paulo; ESALQ; Dept. of Crop Science
  • Joice Andrade Bonfim University of São Paulo; ESALQ; Dept. of Crop Science
  • Elke Jurandy Bran Nogueira Cardoso University of São Paulo; ESALQ; Dept. of Crop Science
Keywords: AMF spores, mycorrhiza, mixed species, soil enzymes, phosphorus

Abstract

Arbuscular mycorrhizal fungi (AMF) are very important to plant nutrition, mostly in terms of acquisition of P and micronutrients. While Acacia mangium is closely associated with AMF throughout the whole cycle, Eucalyptus grandis presents this symbiosis primarily at the seedling stage. The aim of this study was to evaluate the dynamics of AMF in these two tree species in both pure and mixed plantations during the first 20 months after planting. We evaluated the abundance, richness and diversity of AMF spores, the rate of AMF mycorrhizal root colonization, enzymatic activity and soil and litter C, N and P. There was an increase in AMF root colonization of E. grandis when intercropped with A. mangium as well as an increase in the activity of acid and alkaline phosphatase in the presence of leguminous trees. AMF colonization and phosphatase activities were both involved in improvements in P cycling and P nutrition in soil. In addition, P cycling was favored in the intercropped plantation, which showed negative correlation with litter C/N and C/P ratios and positive correlation with soil acid phosphatase activity and soil N and P concentrations. Intercropping A. mangium and E. grandis maximized AMF root colonization of E. grandis and phosphatase activity in the soil, both of which accelerate P cycling and forest performance.

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Published
2018-04-01
How to Cite
Bini, D., Santos, C., Silva, M., Bonfim, J., & Cardoso, E. (2018). Intercropping Acacia mangium stimulates AMF colonization and soil phosphatase activity in Eucalyptus grandis. Scientia Agricola, 75(2), 102-110. https://doi.org/10.1590/1678-992x-2016-0337
Section
Agricultural Microbiology