Data/hora: 02/06/2024 13:39:39

Provedor de dados: | Revista Ciência Agronômica (RCA)
País: | Brazil
Título: | Changes in attributes of soils subjected to fallow in desertification hotspot
Autores: | Ferreira,Mirele Paula da Silva; Artur,Adriana Guirado; Queiroz,Hermano Melo; Romero,Ricardo Espíndola; Costa,Mirian Cristina Gomes.
Data: | 2018-03-01
Ano: | 2018
Palavras-chave: | Soil organic carbon; Soil degradation; Semi-arid region; Overgrazing.
Resumo: | ABSTRACT  Soils in semi-arid regions have been degraded by overgrazing, which reduces the production capacity and, in certain situations, leads to desertification. An alternative to recover degraded areas is the fallow period, which works through the resilience of the soil itself, increasing the supply of organic matter and improving soil physical properties. Thus, the objective of this study was to test the hypothesis that 14-year grazing exclusion improves soil physical and chemical attributes in degraded areas under desertification. The study was conducted in Irauçuba, Ceará State, Brazil. The experimental design was completely randomized, in a 4 x 2 factorial scheme corresponding to four areas and two managements (overgrazing and fallow), with four replicates, plus an area with native vegetation (reference), with characteristics of secondary vegetation. Fallow led to improvements in soil physical and chemical attributes after 14 years; however, in comparison to the study conducted in the same area with a 7-year fallow period, there were few alterations. Organic carbon content was higher in fallow areas than in overgrazing areas, and the fraction in highest proportion was the mineral-associated organic carbon.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100022
Editor: | Universidade Federal do Ceará
Relação: | 10.5935/1806-6690.20180003
Formato: | text/html
Fonte: | Revista Ciência Agronômica  v.49 n.1 2018
Fonte: | info:eu-repo/semantics/openAccess