Autor(es)

Bossolani, Joao William ; Crusciol, Carlos Alexandre Costa ; Mariano, Eduardo ; Fonseca, Mariley ; Moretti, Luiz Gustavo ; Momesso, Letusa ; Portugal, Jose Roberto ; Costa, Nidia Raquel ; Calonego, Juliano Carlos ; Kuramae, Eiko Eurya

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN JOURNAL OF AGRONOMY; v. 149, p. 12-pg., 2023-09-01.

Resumo

In no-tillage rotation systems, the recovery of nitrogen (N) fertilizer in the soil-plant system is affected by soil fertility and biological changes caused by the surface application of lime (L) and phosphogypsum (PG). Here we assessed the effect of surface-applied L and/or PG on the fate of 15N-labeled fertilizer, soil chemical properties, microbial gene copy number (16 S rRNA of prokaryotes and genes of N cycle) and grain yield of maize (Zea mays L. intercropped with ruzigrass) in rotation with soybean [Glycine max (L.) Merrill] during two growing seasons. We found that applying L improved soil fertility, particularly when combined with PG (LPG treatment), resulting in higher grain yield. Moreover, compared with the control, the recovery of 15N-labeled ammonium sulfate [(15NH4)2SO4] increased in maize and ruzigrass dry matter but decreased in soybean grown on the residue of the first growing season in two treatments (L and LPG). The losses of 15N-labeled fertilizer were highest in the control and PG treatments. A large amount of 15N-labeled fertilizer was found in the deep layers of PG-amended soil, indicating leaching of fertilizer-derived 15N. Conversely, the analysis of soil microbial N cycle genes revealed that the abundances of denitrifiers were highest in the control (no correctives applied), suggesting that the N fertilizer remaining in the soil increased denitrification rates. Surface application of a combination of L and PG is clearly a feasible strategy for increasing soil fertility, 15N recovery from fertilizer, and grain yield while reducing envi-ronmental pollution associated with nitrification and denitrification. (AU)

• Processo FAPESP: 19/12764-1 - Impacto da aplicação a longo prazo do calcário e do gesso em sistema plantio direto tropical e mudanças no microbioma do solo e ciclo do nitrogênio
• Beneficiário: João William Bossolani
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 18/11063-7 - Calagem e gessagem em sistema plantio direto de longa duração: qualidade do solo melhorando a fisiologia das culturas e a recuperação do 15N-fertilizante no sistema solo-planta
• Beneficiário: João William Bossolani
• Modalidade de apoio: Bolsas no Brasil - Doutorado