PERFORMANCE OF THE CLONE Eucalyptus urograndis IN A CONVENTIONAL AND SILVOPASTORAL SYSTEM

Q4 Environmental Science

Floresta Pub Date : 2022-03-31 DOI:10.5380/rf.v52i2.69982

Jorge Antonio de Farias, Luana De Campos de Jesus, Débora Luana Pasa, S. Souza

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Abstract

The objective of this study was to analyze forest productivity, comparing the financial viability of a silvopastoral system versus a conventional forest plantation, both using the clone of the hybrid of Eucalyptus urograndis. For the survey of the volume data, nineteen plots of 40.0 x 15.0 m (600 m²) were installed in conventional planting and fifteen plots of 25.0 x 32.0 m (800 m²) in silvopastoral planting. All tree diameters and heights of each plot were measured. The hypsometric relationship models were obtained using the Stepwise method and the trees were cubed using the Smalian method. The volumes were separated into assortments, according to the sales options for the local market. The financial analysis considered cash flows from the year of implementation until the cutting age (7 years), considering the costs spent for the formation and maintenance of the forest throughout the cycle, discounted at an interest rate of 6.75% per year and the volume sold at market value, considering standing wood, at the end of the cycle. The following were evaluated: net present value, equivalent annual value, internal rate of return, expected value of land and average cost of production. The two production systems were considered economically viable for the suggested 7-year rotation, however the silvopastoral system showed results that demonstrate greater financial viability caused mainly by the lower cost of implementation and maintenance, and to the greater volume of the assortments with greater added value (S1 and S2).

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无性系尾大桉在常规和银栖系统中的表现

本研究的目的是分析森林生产力，比较造林系统和传统人工林的财务可行性，两者都使用了桉树杂交种的克隆。对于体积数据的调查，19块40.0 x 15.0 m（600 m²）的地块被安装在传统种植中，15块25.0 x 32.0 m（800 m²）土地被安装在森林畜牧种植中。测量了每个地块的所有树木直径和高度。使用逐步法获得高度关系模型，并使用Smalian法对树进行立方体划分。根据当地市场的销售选择，这些卷被分成了不同的种类。财务分析考虑了从实施年份到采伐年龄（7年）的现金流，考虑到整个周期内森林形成和维护的成本，以每年6.75%的利率贴现，以及周期结束时按市场价值出售的数量，考虑到木材。评估了以下内容：净现值、等价年价值、内部收益率、土地预期价值和平均生产成本。对于建议的7年轮换，这两个生产系统被认为在经济上是可行的，但森林畜牧系统显示出更大的财务可行性，这主要是由于实施和维护成本较低，以及具有更大附加值的品种数量较大（S1和S2）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Floresta Environmental Science-Nature and Landscape Conservation

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： Revista Floresta admits articles of scientific contribution in Forest Science, in the areas of Nature Conservation, Economy and Forest Policy, Forest Management, Silviculture and Wood Technology. The main task is to promote and divulgate the development of Forest Science in Brazil and in the world. Articles published in Revista Floresta are under total responsibility of the authors, who are aware that they are original studies. It remains implicit that articles were not submitted for publication to any other divulgation media. It remains explicit the agreement of authors to norms of the journal and, along the development of their work, the observance of ethic aspects and respect of the current copyright legislation.