Effects of surface application of dolomitic limestone and calcium-magnesium silicate on soybean and maize in rotation with green manure in a tropical region

Autor(es)

Amaral Castro, Gustavo Spadotti ^[1] ; Costa Crusciol, Carlos Alexandre ^[2]

Afiliação do(s) autor(es)

^[1] Embrapa Amapa, Transferencia Tecnol, BR-68903419 Macapa, AP - Brazil

^[2] Univ Estadual Paulista Julio de Mesquita Filho UN, Dept Prod Vegetal, BR-18610307 Botucatu, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bragantia; v. 74, n. 3, p. 311-321, JUL-SEP 2015.
• Citações Web of Science: 7

Resumo

Although lime is currently the material most frequently used to ameliorate soil acidity in Brazil, silicate could efficiently replace this source because of its greater solubility and its greater silicon content, which are beneficial for plant development. This study aimed to evaluate the effects of superficial lime and silicate application on soil chemical attributes as well as on soybean and maize nutrition and grain yields when these crops are grown in rotation with green manure. The experimental design was a complete randomized block with sixteen replicates. Plots were treated with one of two materials for acidity correction (dolomitic lime and calcium/magnesium silicate) or with no soil correction, as a control. Silicate corrected soil acidity and increased exchangeable base levels in soil at greater depths faster than does liming. The application of both acidity-correcting materials increased N, Ca and Mg leaf concentrations, and all yield components and grain yield in soybean; but in maize, just silicate also increased N and Si when compared with lime, whereas both acidity-correcting increased just two yield components: grains per ear and mass of 100 grains, resulting in highest grain yield. The application of both acidity-correcting materials increased dry matter production of green manures, but for pigeon pea the silicate provided the best result in this dry-winter region. (AU)

• Processo FAPESP: 06/01705-4 - Alterações físicas e químicas do solo em função do sistema de produção e da aplicação superficial de silicato de calcário
• Beneficiário: Gustavo Spadotti Amaral Castro
• Modalidade de apoio: Bolsas no Brasil - Mestrado