Abstract
The rapid expansion of eucalyptus cultivation necessitates studies that can identify areas amenable to the planting and development of its different varieties. This study therefore aimed to verify the suitability of two varieties of eucalyptus in the state of Espírito Santo, using Geographic Information Systems supported by strategic decision analysis. Mean precipitation, mean temperature, hydric deficit and land slope data were used as decision factors. These factors were submitted to fuzzy standardization, aggregated and compensated by the Weighted Linear Combination (WLC) process, resulting in the final aptitude mapping. For the reconciliation of conflict areas between the varieties, the Multi-objective Land Allocation (MOLA) module was used to maximize the suitability of the land for the objective. The WLC analysis allowed us to identify the suitability of the areas and with the use of the MOLA module it was possible to resolve the conflict of suitability between the two eucalyptus varieties. Most of the state of Espírito Santo is highly suitable for the the development of varieties. The northwestern region and part of the northern region presented less suitability for both analyzed eucalyptus varieties. Considering the 10,000 km2 most adaptable area for eucalyptus cultivation in the state of Espírito Santo, it was verified that the most suitable areas for planting the two eucalyptus varieties are located in the mountainous regions, part of the southern region and near the northeastern coast.
Highlights
The productive potential of eucalyptus cultivated in tropical regions is very high and has few restrictions
It is noted that the highest values of precipitation occur in the southern, metropolitan and mountainous regions of the state
The species Eucalyptus urophylla has an upper limit of suitability of 1500 mm year -1, which is lower than that shown in some regions of the state
Summary
The productive potential of eucalyptus cultivated in tropical regions is very high and has few restrictions. According to Scolforo et al (2017), the states of Bahia and Espírito Santo have 15.5% of the eucalyptus plantations in Brazil and they are located in the subtropical zone. Eucalyptus wood can be used for cellulose, siderurgy, charcoal, firewood, plywood and wood sheets. It has a great influence on the national economy. Characteristics such as favorable natural conditions, advanced technological forestry development and other privileged conditions (geographic location, infrastructure, transportation logistics and industrial plants diversification) favor the growth of foprestry in Espírito Santo state (Valverde et al, 2005). The fast expansion of eucalyptus cultivated area with its high number of varieties and its great adaptability to the most varied ecological conditions led to the need for studies that could predict its productive capacity in different environments (Bognola et al, 2009)
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