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Position: Home > Articles > Aboveground nutrient components of Eucalyptus camaldulensis and E. grandis in semiarid Brazil under the nature and the mycorrhizal inoculation conditions. Journal of Forestry Research 2009,20 (1) 15-22,i

Aboveground nutrient components of Eucalyptus camaldulensis and E. grandis in semiarid Brazil under the nature and the mycorrhizal inoculation conditions.

作者：

Pagano M. C.;Bellote A. F.;Scotti M. R.

单位：

CEP: 31270-901 Belo Horizonte; Av. Antonio Carlos; Federal University of Minas Gerais;Microorganism-Plant Interaction Laboratory; Institute of Biological Sciences; MG; Brazil.; Pampulha

关键词：

biomass;branches;calcium;chemical composition;dry matter accumulation;forest plantations;inoculation;leaves;magnesium;multipurpose trees;mycorrhizal fungi;mycorrhizas;nitrogen;nutrient content;phosphorus;plant composition;potassium;stems;trees;Eucalyptus camaldulensis;Eucalyptus grandis;Brazil;Minas Gerais

摘要：

A study was conducted to evaluate the aboveground biomass, nutrient content and the percentages of mycorrhizal colonization in Eucalyptus camaldulensis and E. grandis plantations in the semiarid region in the north of the State of Minas Gerais in Brazil. Results show that the total above-ground biomass (dry matter) was 33.6 tonnes/ha^-1 for E. camaldulensis and 53.1 tonnes/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. 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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Aboveground nutrient components of Eucalyptus camaldulensis and E. grandis in semiarid Brazil under the nature and the mycorrhizal inoculation conditions.

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