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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Silicon Amendment Enhances Agronomic Efficiency of Nitrogen Fertilization in Maize and Wheat Crops under Tropical Conditions

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Autor(es):
Galindo, Fernando Shintate [1] ; Pagliari, Paulo Humberto [2] ; Rodrigues, Willian Lima [3] ; Fernandes, Guilherme Carlos [3] ; Boleta, Eduardo Henrique Marcandalli [3] ; Santini, Jose Mateus Kondo [3] ; Jalal, Arshad [3] ; Buzetti, Salatier [3] ; Lavres, Jose [3] ; Teixeira Filho, Marcelo Carvalho Minhoto [3]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Ctr Nucl Energy CENA, BR-13416000 Piracicaba - Brazil
[2] Univ Minnesota UMN, Dept Soil Water & Climate, Southwest Res & Outreach SWROC, Lamberton, MN 56152 - USA
[3] Sao Paulo State Univ UNESP, Dept Plant Hlth Rural Engn & Soils DEFERS, BR-15345000 Ilha Solteira - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: PLANTS-BASEL; v. 10, n. 7 JUL 2021.
Citações Web of Science: 0
Resumo

Sustainable management strategies are needed to improve agronomic efficiency and cereal yield production under harsh abiotic climatic conditions such as in tropical Savannah. Under these environments, field-grown crops are usually exposed to drought and high temperature conditions. Silicon (Si) application could be a useful and sustainable strategy to enhance agronomic N use efficiency, leading to better cereal development. This study was developed to explore the effect of Si application as a soil amendment source (Ca and Mg silicate) associated with N levels applied in a side-dressing (control, low, medium and high N levels) on maize and wheat development, N uptake, agronomic efficiency and grain yield. The field experiments were carried out during four cropping seasons, using two soil amendment sources (Ca and Mg silicate and dolomitic limestone) and four N levels (0, 50, 100 and 200 kg N ha(-1)). The following evaluations were performed in maize and wheat crops: the shoots and roots biomass, total N, N-NO3-, N-NH4+ and Si accumulation in the shoots, roots and grain tissue, leaf chlorophyll index, grain yield and agronomic efficiency. The silicon amendment application enhanced leaf chlorophyll index, agronomic efficiency and N-uptake in maize and wheat plants, benefiting shoots and roots development and leading to a higher grain yield (an increase of 5.2 and 7.6%, respectively). It would be possible to reduce N fertilization in maize from 185-180 to 100 kg N ha(-1) while maintaining similar grain yield with Si application. Additionally, Si application would reduce N fertilization in wheat from 195-200 to 100 kg N ha(-1). Silicon application could be a key technology for improving plant-soil N-management, especially in Si accumulator crops, leading to a more sustainable cereal production under tropical conditions. (AU)

Processo FAPESP: 17/06002-6 - Inoculação com Azospirillum brasilense associada à utilização de silício e doses de nitrogênio nas culturas do milho e trigo
Beneficiário:Fernando Shintate Galindo
Linha de fomento: Bolsas no Brasil - Doutorado