Liming demand and plant growth improvements for an Oxisol under long-term no-till cropping

Autor(es)

Carmeis Filho, A. C. A. ; Crusciol, C. A. C. ; Castilhos, A. M.

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF AGRICULTURAL SCIENCE; v. 155, n. 7, p. 1093-1112, SEP 2017.
• Citações Web of Science: 2

Resumo

The adequate management of soil acidity has long been a challenge in no-till (NT) cropping systems. Some studies conducted in sub-tropical conditions have demonstrated the feasibility of surface liming. However, for tropical regions with dry winters, little long-term information about adequate rates and frequencies of application is available. A 12-year field trial was performed under a tropical no-tillage system with an annual crop rotation scheme. The treatments were composed of four lime rates (0, 1000, 2000 and 4000 kg/ha), estimated via the base saturation (BS) method. Surface application of lime was found to be an effective method for improving the soil fertility profile under this long-term NT cropping system. All three acidity components (pH, hydrogen + aluminium (H + Al), exchangeable Al) and some fertility attributes (phosphorus, exchangeable calcium and magnesium, and BS) were adjusted to a linear function, and better soil chemical conditions were obtained in the 4000 kg/ha treatment, even 4 years after the final application. Due to soil chemical changes, the root length density of wheat and common bean was greater at depths <0.20 m, which led to a higher grain yield, even under unfavourable weather conditions. The results indicate that the application of lime at higher rates can be an acceptable criterion for a tropical Oxisol under a no-tillage system, reducing the frequency of lime application. (AU)

• Processo FAPESP: 13/18462-0 - Alterações Físicas E Matéria Orgânica Do Solo Em Função Da Aplicação Superficial De Calcário E Gesso Na Sucessão Trigo/Feijão Em Experimento De Longa Duração.
• Beneficiário: Antonio Carlos de Almeida Carmeis Filho
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/16712-2 - Fracionamento físico da matéria orgânica e compostos húmicos em função da aplicação superficial de calcário e gesso em experimento de longa duração sob plantio direto
• Beneficiário: Antonio Carlos de Almeida Carmeis Filho
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado