Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/18593
Tipo: Artigo
Título: Soil, water, and nutrient losses from management alternatives for degraded pasture in Brazilian Atlantic Rainforest biome
Autor(es): Rocha Junior, Paulo Roberto da
Andrade, Felipe Vaz
Mendonça, Eduardo de Sá
Donagemma, Guilherme Kangussú
Fernandes, Raphael Bragança Alves
Bhattharai, Rabin
Kalita, Prasanta Kumar
Abstract: The objective of this study was to evaluate sediment, water and nutrient losses from different pasture managements in the Atlantic Rainforest biome. A field study was carried out in Alegre Espiríto Santo, Brazil, on a Xanthic Ferralsol cultivated with braquiaria (Brachiaria brizantha). The six pasture managements studied were: control (CON), chisel (CHI), fertilizer (FER), burned (BUR), plowing and harrowing (PH), and integrated crop-livestock (iCL). Runoff and sediment samples were collected and analyzed for calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P) and organic carbon contents. Soil physical attributes and above and below biomass were also evaluated. The results indicated that higher water loss was observed for iCL (129.90 mm) and CON (123.25 mm) managements, and the sediment losses were higher for CON (10.24 t ha− 1) and BUR (5.20 t ha− 1) managements when compared to the other managements. Majority of the nutrients losses occurred in dissolved fraction (99% of Ca, 99% of Mg, 96% of K, and 65% of P), whereas a significant fraction of organic carbon (80%) loss occurred in a particulate form. Except for P, other nutrients (Ca, Mg and K) and organic carbon losses were higher in coarse sediment compared to fine sediment. The greater losses of sediment, organic carbon, and nutrients were observed for CON followed by BUR management (p < 0.05). Our findings indicated that the traditional pasture management adopted in the Atlantic Rainforest needs to be rethought and burned management should be avoided. Based on the water, soil, and nutrient losses from various practices, to reduce pasture degradation, farmers should adopt edaphic practices by applying lime and fertilize to improve pasture growth and soil cover, and reducing soil erosion in the hilly Brazilian Atlantic Rainforest biome
Palavras-chave: Pasture management
Nutrients
Runoff
Soil erosion
Tropical soil management
Soil quality
Editor: Science of The Total Environment
Tipo de Acesso: Published by Elsevier B.V.
URI: https://doi.org/10.1016/j.scitotenv.2016.12.187
http://www.locus.ufv.br/handle/123456789/18593
Data do documento: 16-Jan-2017
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