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首页> 外文期刊>Revista rvore >Biomassa e macronutrientes de uma floresta estacional decidual em Itaara-RS, Brasil
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Biomassa e macronutrientes de uma floresta estacional decidual em Itaara-RS, Brasil

机译：巴西Itara-rs落叶季节性森林的生物量和Macronurients

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摘要

The present study was conducted in a fragment of a seasonal deciduous forest in Itaara-RS, Brazil. The objective of this work was to quantify the nutrient in above ground biomass of forestry species. For the above ground biomass evaluation, 20 trees were cut down according to five different diameter classes (3,2-13,5 cm; 13,6-23,9 cm; 24,0-33,6 cm; 33,7-44,6 cm; 44,7-55,0 cm). The above ground biomass was separated in the compartment trunk wood, trunk bark, branches and leaves. The contents of N, P, K, Ca, Mg and S in the biomass samples were determined. The stock of nutrients in the biomass for each component was obtained based on the estimated dry biomass, multiplied by the nutrient content. The total production of above ground biomass was estimated at 210.0 Mg ha-1. The branches, trunk wood, trunk bark and leaves corresponded to 48.8, 43.3, 5.4 and 2.4% of the above ground biomass. The largest contents of N, P, K, Mg and S were verified in leaves; while greatest Ca content was found in trunk bark. The trunk wood was the component that showed the lowest concentration of nutrients in its biomass. In general, Ca, N and K are the nutrients with the largest stock in the above ground biomass. The largest stocks of nutrients are present in branches, which is mainly due to the great biomass, followed by trunk wood.
机译：本研究在巴西的Itaara-Rs季节性落叶林的片段中进行。这项工作的目的是量化林业物种以上生物质的营养素。对于上述地面生物质评价，根据五种不同的直径等级（3,2-13,5cm; 13,6-23,9cm; 24,0-33,6厘米; 33,7- 44,6厘米; 44,7-55,0厘米）。将上述地面生物质分离在隔室树干，树干树皮，树枝和叶子中。测定了生物质样品中N，P，K，Ca，Mg和S的含量。基于估计的干生物质，得到了每个组分的生物质中的营养素的储备，乘以营养含量。估计在210.0mg HA-1的地上生物质的总产量。分支机构，树干木材，躯干吠声和叶子对应于上述地上生物质的48.8,43.3,5.4和2.4％。在叶子中验证了n，p，k，mg和s的最大含量;虽然在Trunk Bark中发现了最大的CA内容。树干木材是其生物质中营养成分最低的组成部分。通常，Ca，N和K是上述地面生物质中最大的营养素。在分支中存在最大的营养股，主要是由于伟大的生物量，然后是树干木材。

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