English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

O objetivo deste estudo foi avaliar teores de carbono orgânico e atributos químicos do solo em áreas localizadas em Campo Belo do Sul, SC, nos seguintes usos da terra: campo nativo (CN); floresta de pinus (Pinus taeda) com 12 anos (P12); floresta de pinus com 20 anos (P20); reflorestamento de araucária (Araucaria angustifolia) com 18 anos (A18); e mata nativa de araucária (MN). O solo foi amostrado de forma sistemática, com oito repetições, coletando&#45;se as camadas de 0,0&#45;0,05; 0,05&#45;0,1; 0,1&#45;0,2; e 0,2&#45;0,4 m. Os reflorestamentos com pinus e araucária mantiveram os estoques de C orgânico na camada do solo de 0,0&#45;0,4 m em níveis equivalentes aos de mata e campo, totalizando de 12,5 a 14,2 kg m&#45;2. A acidez do solo e os teores de P disponível foram maiores, na média das camadas analisadas, no tratamento P20. Entre os nutrientes, verificaram&#45;se teores baixos a médios de P disponível e de K, Ca e Mg trocável. The objective of this work was to evaluate organic carbon contents and soil chemical attributes in forest areas in Campo Belo do Sul, Santa Catarina, Brazil, with the following land use: native grassland (NG); 12&#45;year&#45;old loblolly pine (Pinus taeda) reforestation (P12); 20&#45;year&#45;old loblolly pine reforestation (P20); 18&#45;year&#45;old araucaria (Araucaria angustifolia) reforestation (A18); and native forest with araucaria (NF). The soil samples were systematically collected with eight replicates, in the layers of 0.0&#45;0.05; 0.05&#45;0.1; 0.1&#45;0.2 and 0.2&#45;0.4 m. The pinus and araucaria reforestations showed organic C stocks similar to those in native forest and grassland areas, reaching 12.5 to 14.2 kg m&#45;2 in the layer of 0.0&#45;0.4 m depth. Soil acidity and available P contents were highest, in the mean of the analyzed soil layers, under the P20 treatment. Soil nutrient status ranged from low to medium for available P and exchangeable K, Ca and Mg

Carbono orgânico e atributos químicos do solo em áreas florestais