Aboveground nutrient components of Eucalyptus camaldulensis and E. grandis in semiarid Brazil under the nature and the mycorrhizal inoculation conditions |
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| Authors: | Marcela C Pagano Antonio F Bellote Maria R Scotti |
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| Institution: | 1. Microorganism-Plant Interaction Laboratory, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Ant?nio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
2. Embrapa Forestry, Estrada da Ribeira, km 111, Caixa Postal 319, Colombo, PR, 83411-000-, Brazil
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| Abstract: | A study was conducted to evaluate the aboveground biomass, nutrient content and the percentages of mycorrhizal colonization
in Eucalyptus camaldulensis and Eucalyptus grandis plantations in the semiarid region (15° 09′ S 43° 49′ W) in the north of the State of Minas Gerais in Brazil. Results show
that the total above-ground biomass (dry matter) was 33.6 Mg·ha?1 for E. camaldulensis and 53.1 Mg·ha?1 for E. grandis. The biomass of the stem wood, leaves, branches, and stem bark for E. camaldulensis accounted for 64.4%, 19.6%, 15.4%, and 0.6% of the total biomass, respectively (Table 2); meanwhile a similar partition of
the total above-ground biomass was also found for E. grandis. The dry matter of leaves and branches of E. camaldulensis accounted for 35% of total biomass, and the contents of N, P, K, Ca, Mg, and S in leaves and branches accounted for 15.5%,
0.7%, 12.3%, 22.6%, 1.9%, and 1.4% of those in total above-ground biomass, respectively. In the trunk (bark and wood), nutrient
accumulation in general was lower. Nutrient content of E. grandis presented little variation compared with that of E. camaldulensis. Wood localized in superior parts of trunk presented a higher concentration of P and bark contained significant amounts of
nutrients, especially in E. grandis. This indicated that leaving vegetal waste is of importance on the site in reducing the loss of tree productivity in this
semi-arid region. The two species showed mycotrophy. |
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| Keywords: | Eucalyptus biomass nutrient components semi-arid region mycorrhizal symbioses Brazil |
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