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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.)

Biomass and Nutrient Content by Sugarcane as Affected by Fertilizer Nitrogen Sources

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Autor(es):
Mariano, Eduardo ; Leite, Jose M. ; Vieira-Megda, Michele X. ; Ciampitti, Ignacio A. ; Vitti, Andre C. ; Faroni, Carlos E. ; Franco, Henrique C. J. ; Trivelin, Paulo C. O.
Número total de Autores: 8
Tipo de documento: Artigo Científico
Fonte: CROP SCIENCE; v. 56, n. 3, p. 1234-1244, MAY-JUN 2016.
Citações Web of Science: 12
Resumo

Knowing the right fertilizer N source is a key management practice for improving nutrient use and productivity for sugarcane (Saccharum spp.). Therefore, this study evaluated the effect of fertilizer N sources on aboveground biomass (BM) and nutrient (N, P, K, Ca, Mg, and S) content for sugarcane ratoon. Two field trials under highly weathered tropical soils (Site 1, Typic Hapludox; Site 2, Typic Eutrustox) were conducted in the southeast region of Brazil. Five fertilizer N sources (organomineral fertilizer {[}OMF], ammonium chloride {[}AC], ammonium nitrate {[}AN], calcium ammonium nitrate {[}CAN], and urea) were applied on sugarcane at a rate of 100 kg N ha(-1). A control treatment was also included in the randomized complete block design. At harvest, total BM varied from 24.4 Mg ha(-1) (control and AC) at Site 1 to 44.2 Mg ha(-1) (CAN) at Site 2, total K content varied from 185 kg ha(-1) (AC) at Site 2 to 747 kg ha(-1) (OMF) at Site 1, and total N content ranged from 92 kg ha(-1) (AC) at Site 2 to 165 kg ha(-1) (AN) at Site 1. Use of CAN and OMF resulted in comparable or superior BM and nutrient content relative to the other N fertilizers. In contrast, AC did not increase BM and nutrient content (except for N and Mg at Site 1), but also decreased by 33% total N content than control at Site 2. Use of more efficient fertilizer N sources (e.g., CAN and OMF) could increase productivity and nutrient use for sugarcane ratoon systems. (AU)

Processo FAPESP: 09/12537-3 - Acúmulo de fitomassa e de nutrientes em cana-de-açúcar (cana soca) relacionados a fontes de nitrogênio no sistema sem queima
Beneficiário:José Marcos Leite
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 09/10192-9 - Eficiência agronômica de fontes nitrogenadas aplicadas em soqueira de cana-de-açúcar colhida mecanicamente
Beneficiário:Michele Xavier Vieira Megda
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 09/04691-2 - Mineralização e disponibilidade de nitrogênio em solos cultivados com cana-de-açúcar
Beneficiário:Eduardo Mariano
Linha de fomento: Bolsas no Brasil - Mestrado