Optimizing foliar N-fertilization in sugarcane depends on plant genotype and nitrogen concentration
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Optimizing foliar N-fertilization in sugarcane depends on plant genotype and nitrogen concentration. / Quassi de Castro, Saulo Augusto; Sermarini, Renata Alcarde; Rossi, Monica Lanzoni; Linhares de Castro, Renata Rebellato; Trivelin, Paulo Cesar Ocheuze; Linhares, Francisco Scaglia.
I: Physiologia Plantarum, Bind 175, Nr. 6, e14085, 2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Optimizing foliar N-fertilization in sugarcane depends on plant genotype and nitrogen concentration
AU - Quassi de Castro, Saulo Augusto
AU - Sermarini, Renata Alcarde
AU - Rossi, Monica Lanzoni
AU - Linhares de Castro, Renata Rebellato
AU - Trivelin, Paulo Cesar Ocheuze
AU - Linhares, Francisco Scaglia
N1 - Publisher Copyright: © 2023 Scandinavian Plant Physiology Society.
PY - 2023
Y1 - 2023
N2 - Foliar N-fertilization (FNf) has emerged as a promising approach to synchronize plant nitrogen (N) demands and application timing, reducing the N losses to the environment associated with traditional soil-based fertilization methods. However, limited information exists regarding the effectiveness of FNf in sugarcane. This study aimed to optimize FNf in sugarcane by evaluating N-fertilizer recovery by the plant (NRP) and assessing potential toxicity effects. Four sugarcane genotypes were subjected to FNf using 15N-urea at five nitrogen concentrations. NRP was assessed at five time points for roots, stalk, old leaves, 15N-urea-fertilized leaves (15NL), and unexpanded leaves (UEL). Leaf scorching, indicating FNf toxicity, was analyzed using morpho-anatomical and histochemical techniques. The results showed that FNf promoted high NRP, with an average recovery of 62.3%. Surprisingly, the redistribution of 15N-urea did not follow the nitrogen uptake rate by sugarcane leaves, with an average of 41.3% of the total-NRP. The stalk emerged as the primary sink for 15N-urea, followed by the UEL. Genotypes differed in the leaf scorching intensity, which increased with higher concentration of 15N-urea. Genotypes also differed in the 15N-urea uptake rate, down-regulated by the N content in the 15NL. These findings emphasize that by carefully choosing the appropriate genotype and nitrogen concentration, FNf can significantly enhance N-fertilizer uptake, resulting in potential environmental and economic benefits.
AB - Foliar N-fertilization (FNf) has emerged as a promising approach to synchronize plant nitrogen (N) demands and application timing, reducing the N losses to the environment associated with traditional soil-based fertilization methods. However, limited information exists regarding the effectiveness of FNf in sugarcane. This study aimed to optimize FNf in sugarcane by evaluating N-fertilizer recovery by the plant (NRP) and assessing potential toxicity effects. Four sugarcane genotypes were subjected to FNf using 15N-urea at five nitrogen concentrations. NRP was assessed at five time points for roots, stalk, old leaves, 15N-urea-fertilized leaves (15NL), and unexpanded leaves (UEL). Leaf scorching, indicating FNf toxicity, was analyzed using morpho-anatomical and histochemical techniques. The results showed that FNf promoted high NRP, with an average recovery of 62.3%. Surprisingly, the redistribution of 15N-urea did not follow the nitrogen uptake rate by sugarcane leaves, with an average of 41.3% of the total-NRP. The stalk emerged as the primary sink for 15N-urea, followed by the UEL. Genotypes differed in the leaf scorching intensity, which increased with higher concentration of 15N-urea. Genotypes also differed in the 15N-urea uptake rate, down-regulated by the N content in the 15NL. These findings emphasize that by carefully choosing the appropriate genotype and nitrogen concentration, FNf can significantly enhance N-fertilizer uptake, resulting in potential environmental and economic benefits.
KW - labeled nitrogen
KW - leaf scorching
KW - nitrogen recovery
KW - sugarcane varieties
KW - urea
U2 - 10.1111/ppl.14085
DO - 10.1111/ppl.14085
M3 - Journal article
C2 - 38148209
AN - SCOPUS:85177445646
VL - 175
JO - Physiologia Plantarum
JF - Physiologia Plantarum
SN - 0031-9317
IS - 6
M1 - e14085
ER -
ID: 376457386