Evolution of physical, chemical, and biological attributes of hydromorphic soil under crop-livestock integration systems in the Pampa biome

• Autor(a) principal: Carvalho, Juliana dos Santos
• Data de Publicação: 2016
• Outros Autores: Kunde, Roberta Jeske, Stöcker, Cristiane Mariliz, Lima, Ana Cláudia Rodrigues de, Silva, Jamir Luis Silva da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/22256
• topic: floodplain, edaphic fauna, Haplic Albaqualf, no-tillage, soil quality, lowlands.; áreas de várzea, fauna edáfica, Planossolo Háplico, plantio direto, qualidade do solo, terras baixas.

The objective of this work was to evaluate the evolution of physical, chemical, and biological attributes of a hydromorphic soil, in crop-livestock integration systems in the Pampa biome. The study was carried out in an experimental area under no-tillage system since 2006, in the municipality of Capão do Leão, in the state of Rio Grande do Sul, Brazil, in a Haplic Albaqualf. Three areas were used with the following management types: an area without grazing; a grazing area under crop-livestock integration (CLI), with soybean or corn in alternating years, in succession to winter grazing; and a native grazed field. Soil samplings were conducted in two seasons in all areas, at the 0.00–0.05, 0.05–0.10, and 0.10–0.20-m soil layers, in order to carry out the following soil analyses: physical attributes, macroporosity, microporosity and density; chemical attributes, total organic carbon, total nitrogen, and carbon/nitrogen ratio; biological attributes, diversity and abundance of edaphic macrofauna. In the grazinf area, macroporosity increase over the time. There was a reduction in soil bulk density at the 0.00–0.05-m soil depth, whereas total organic carbon increased in the 0.10–0.20-m soil depth, in all areas. The crop-livestock integration system benefits the abundance and diversity of the edaphic fauna in the soil.