Catálogo CEIBA de la Biblioteca Central de FAUBA


Vista normal Vista MARC Vista ISBD

N:P:S stoichiometry in grains and physiological attributes associated with grain yield in maize as affected by phosphorus and sulfur nutrition

Colaborador(es): Salvagiotti, Fernando. Dep. Agronomía, EEA Oliveros INTA, Ruta 11 km 353 (C 2206), Santa Fe, Argentina | Prystupa, Pablo. Cátedra de Fertilidad y Fertilizantes, Facultad de Agronomía UBA, INBA-CONICET, Av. San Martín 4453, C 1417DSE, Buenos Aires, Argentina | Ferraris, Gustavo. EEA Pergamino INTA, Ruta 32 km 4,5 (C 2700), Pergamino, Buenos Aires, Argentina | Couretot, Lucrecia A. EEA Pergamino INTA, Ruta 32 km 4,5 (C 2700), Pergamino, Buenos Aires, Argentina | Magnano, Luciana. Dep. Agronomía, EEA Oliveros INTA, Ruta 11 km 353 (C 2206), Santa Fe, Argentina | Dignani, Damián. Private Consultant, Mendoza 60 (C 2131), Coronel Arnold, Santa Fe, Argentina | Gutiérrez Boem, Flavio Hernán. Cátedra de Fertilidad y Fertilizantes, Facultad de Agronomía UBA, INBA-CONICET, Av. San Martín 4453, C 1417DSE, Buenos Aires, Argentina.
ISSN: 0378-4290.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): | SULFUR | MAIZE | PHOSPHORUS | PHYSIOLOGICAL ATTRIBUTES | STOICHIOMETRIC RELATIONSHIPS | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR En: Field crops research Vol.203 (2017), p.128–138; tbls., grafs., mapasResumen: Balanced nutrition is necessary to reduce yield gaps in maize. Simultaneous phosphorus (P) and sulfur(S) deficiencies may be present in soils, so a P × S interaction is expected. In maize, yield is closely relatedto grain number (GN); thus, nutrient deficiencies impacting crop growth during GN formation can con-sequently impact yields. Grain nutrient concentration may reflect soil supplying capacity, and nutrientstoichiometry in grains can be used as an indirect indicator of nutrient deficiency for a retrospectivediagnosis of sites responsive to P or S fertilization. The objectives of this study were to: i) determinemaize response to increasing S fertilizer rates and to P addition; ii) analyze the effects of P, S, and theirinteraction on mechanisms involved in yield determination of maize; and iii) evaluate the effects of Pand S shortage on stoichiometric relationships among N, P, and S content in maize grains. Two fertiliza-tion experiments were conducted on-farming conditions in 19 sites-year (SY) for analyzing grain yieldresponse to increasing S fertilizer rates (E1), and studying the interaction between P and S fertilization ongrain yield and physiological attributes associated with grain yield determination (E2), i.e. CGRCP, IPARCP,RUECPand biomass at R6. Also N (%N), S (%S) and P (%P) concentration in grains were determined. Stoi-chiometric relationships among N, P and S in both P or S fertilized and unfertilized treatments in all SYwere analyzed. Average grain yield response due to S and P addition was ca. 13 and 20%, respectively.Grain yield increased up to S fertilizer rates around 10 kg S ha−1. P addition increased CGRCPby 15–60%in 8 SY while S addition 12–16% in 2 SY. Both, RUECPand IPARCPwere positively associated with biomassproduction. P fertilization increased IPARCPby 4%, but no S effect was observed. Before silking, P additionboosted cumulated radiation by 7%, but after silking no P or S effects were observed. A significant P × Sinteraction was observed for RUECP, since S fertilization increased RUECPby 14% only when P was notadded. Independently of P or S shortage, grain N content scaled almost isometrically with grain S content,while N:P and P:S showed allometric relationships. Phosphorus deficiency did not modify N:S, N:P norP:S stoichiometry. Likewise, S addition did not modify the N:P or N:S stoichiometry. A significant changein the intercept of the P:S relationship was observed in response to fertilization and may be used as atool for identifying S responsive sites using grain nutrient analysis.
Etiquetas de esta biblioteca: No hay etiquetas de esta biblioteca para este título. Ingresar para agregar etiquetas.
    valoración media: 0.0 (0 votos)

Balanced nutrition is necessary to reduce yield gaps in maize. Simultaneous phosphorus (P) and sulfur(S) deficiencies may be present in soils, so a P × S interaction is expected. In maize, yield is closely relatedto grain number (GN); thus, nutrient deficiencies impacting crop growth during GN formation can con-sequently impact yields. Grain nutrient concentration may reflect soil supplying capacity, and nutrientstoichiometry in grains can be used as an indirect indicator of nutrient deficiency for a retrospectivediagnosis of sites responsive to P or S fertilization. The objectives of this study were to: i) determinemaize response to increasing S fertilizer rates and to P addition; ii) analyze the effects of P, S, and theirinteraction on mechanisms involved in yield determination of maize; and iii) evaluate the effects of Pand S shortage on stoichiometric relationships among N, P, and S content in maize grains. Two fertiliza-tion experiments were conducted on-farming conditions in 19 sites-year (SY) for analyzing grain yieldresponse to increasing S fertilizer rates (E1), and studying the interaction between P and S fertilization ongrain yield and physiological attributes associated with grain yield determination (E2), i.e. CGRCP, IPARCP,RUECPand biomass at R6. Also N (%N), S (%S) and P (%P) concentration in grains were determined. Stoi-chiometric relationships among N, P and S in both P or S fertilized and unfertilized treatments in all SYwere analyzed. Average grain yield response due to S and P addition was ca. 13 and 20%, respectively.Grain yield increased up to S fertilizer rates around 10 kg S ha−1. P addition increased CGRCPby 15–60%in 8 SY while S addition 12–16% in 2 SY. Both, RUECPand IPARCPwere positively associated with biomassproduction. P fertilization increased IPARCPby 4%, but no S effect was observed. Before silking, P additionboosted cumulated radiation by 7%, but after silking no P or S effects were observed. A significant P × Sinteraction was observed for RUECP, since S fertilization increased RUECPby 14% only when P was notadded. Independently of P or S shortage, grain N content scaled almost isometrically with grain S content,while N:P and P:S showed allometric relationships. Phosphorus deficiency did not modify N:S, N:P norP:S stoichiometry. Likewise, S addition did not modify the N:P or N:S stoichiometry. A significant changein the intercept of the P:S relationship was observed in response to fertilization and may be used as atool for identifying S responsive sites using grain nutrient analysis.

No hay comentarios para este ítem.

Ingresar a su cuenta para colocar un comentario.

Av. San Martín 4453 - 1417 – CABA – Argentina.
Sala de lectura de Planta Baja: bibliote@agro.uba.ar (54 11) 5287-0013
Referencia: referen@agro.uba.ar (54 11) 5287-0418
Hemeroteca: hemerote@agro.uba.ar (54 11) 5287-0218