Fallow Reduces Soil Losses and Increases Carbon Stock in Caatinga
Tipo de material:
ArtigoAssunto(s): Recursos online:
Em: Floresta e Ambiente (Brazil) v. 24 p. 1-10; (2017)Sumário:
ABSTRACT
This study aimed at evaluating whether 10 years of fallow was sufficient to restore a degraded
hillslope in the semi-arid Caatinga biome, Brazil. For this purpose, runoff, erosion, loss of
nutrients and organic carbon were measured on two comparable hillslopes: one was left fallow
and the other degraded caused by overgrazing. Fallow management reduced runoff (36%), soil
loss (65%) and organic carbon loss (81%) in comparison with the degraded hillslope. However,
the fallow did not significantly reduce nutrient loss. Animal grazing has been shown to influence
the nutrient cycle in the soil. The loss of organic carbon shows significant correlation with the
loss of other nutrients, and may be used to estimate nutrient loss. Results show that a decade of
fallow did not promote significant changes in the loss of nutrients, but was enough to reduce
runoff, erosion and loss of organic carbon.
Keywords: soil recovery, land use, runoff, semi-arid.
| Tipo de material | Biblioteca atual | Coleção | Número de chamada | Informaçaõ do volume | Situação | Devolução em | Código de barras |
|---|---|---|---|---|---|---|---|
Periódicos
|
Biblioteca Nacional de Agricultura - Binagri Agrobase - Periódicos | Periódicos agrícolas | 2017 24(101 artigos) | Online | 2025-0444 |
Publicação on-line; 35 ref.; 3 tables; 2 illus.; Summary (En)
ABSTRACT
This study aimed at evaluating whether 10 years of fallow was sufficient to restore a degraded
hillslope in the semi-arid Caatinga biome, Brazil. For this purpose, runoff, erosion, loss of
nutrients and organic carbon were measured on two comparable hillslopes: one was left fallow
and the other degraded caused by overgrazing. Fallow management reduced runoff (36%), soil
loss (65%) and organic carbon loss (81%) in comparison with the degraded hillslope. However,
the fallow did not significantly reduce nutrient loss. Animal grazing has been shown to influence
the nutrient cycle in the soil. The loss of organic carbon shows significant correlation with the
loss of other nutrients, and may be used to estimate nutrient loss. Results show that a decade of
fallow did not promote significant changes in the loss of nutrients, but was enough to reduce
runoff, erosion and loss of organic carbon.
Keywords: soil recovery, land use, runoff, semi-arid.
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