Corn shoot and grain nutrient uptake affected by silicon application combined with Azospirillum brasilense inoculation and nitrogen rates

Autor(es)

Galindo, Fernando Shintate ^[1] ; Pagliari, Paulo Humberto ^[2] ; Buzetti, Salatier ^[1] ; Rodrigues, Willian Lima ^[1] ; Fernandes, Guilherme Carlos ^[1] ; Biagini, Antonio Leonardo Campos ^[1] ; Marega, Evelyn Maria Rocha ^[1] ; Tavanti, Renan Francisco Rimoldi ^[1] ; Jalal, Arshad ^[1] ; Teixeira Filho, Marcelo Carvalho Minhoto ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Dept Plant Hlth Rural Engn & Soils, Ilha Solteira, SP - Brazil

^[2] Univ Minnesota, Southwest Res & Outreach Ctr, Dept Soil Water & Climate, Lamberton, MN - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PLANT NUTRITION; v. 45, n. 2, p. 168-184, NOV 15 2021.
• Citações Web of Science: 1

Resumo

This study was developed to investigate if Ca and Mg silicate application as Si source combined with inoculation with Azospirillum brasilense and N rates can affect corn nutrient uptake. The study was set up in a Rhodic Hapludox under no-till system, located in Selviria, state of Mato Grosso do Sul, Brazil. Treatments included: (i) two seed inoculation (with and without A. brasilense); (ii) two soil amendment sources (Ca and Mg silicate as Si source and dolomitic limestone); and (iii) five N application rates applied as side-dress (0 to 200 kg ha(-1)). Increasing N rates positively influenced corn nutrition with increased nutrient and Si uptake in shoot and grain. The average nutrient uptake in descending order was K > N > Ca > Si > Mg > S > P >Fe > Mn > Zn > Cu > B for shoot and N > K > P > S > Mg > Ca > Si> Fe > Zn > Mn > B > Cu for grain. Calcium and Mg silicate application positively influenced corn nutrition with greater shoot P, K, Ca, S, and B uptake and grain Ca uptake. Inoculation with A. brasilense was found to increase nutrient uptake with greater shoot N, K, Ca, B, and Si and grain Cu uptake. Grain N and S increased by 22.5 and 26.8% when plants were inoculated and 200 kg N ha(-1) was applied and grain Zn increased by 88.6, 65.7, and 99% when plants were inoculated and 50, 150, and 200 kg N ha(-1) were applied, respectively. Therefore, studies conducted under tropical conditions are needed to better understand the role of Si combined with PGPB inoculation under different N management and their effects on plant nutrition and cereal development aiming at improving nutrient replenishment. (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
• Modalidade de apoio: Bolsas no Brasil - Doutorado