Long - term phosphorus fertilization of wheat, soybean and maize on Mollisols soil test trends, critical levels and balances

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Few reports have compared the P critical level between different crops under equivalent growing conditions and the impact of P balance and P fertilization practices on the long term dynamics of soil available P. The objectives of this study were: i) to determine and compare, under similar field cond...

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Detalles Bibliográficos
Otros Autores: Sucunza, Florencia A., Gutiérrez Boem, Flavio Hernán, García, Fernando Oscar, Boxler, Miguel, Rubio, Gerardo
Formato: Artículo
Lenguaje:Inglés
Materias:
SOIL TEST PHOSPHORUS
PHOSPHORUS BALANCE
LONG - TERM EXPERIMENTS
P FERTILIZATION
BRAY - P
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2018sucunza.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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024 |a 10.1016/j.eja.2018.03.004 
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245 1 0 |a Long - term phosphorus fertilization of wheat, soybean and maize on Mollisols  |b soil test trends, critical levels and balances 
520 |a Few reports have compared the P critical level between different crops under equivalent growing conditions and the impact of P balance and P fertilization practices on the long term dynamics of soil available P. The objectives of this study were: i) to determine and compare, under similar field conditions, the P critical values for soybean, maize and wheat; and ii) to evaluate the effect of long - term application of P fertilizer on P balance and soil-test P. Results from a long-term experiment (2000/01 and 2013/14) involving soybean, maize and wheat crops in five experimental sites located at the Pampean Region (Argentina) were analyzed. Phosphorus levels included a −P treatment without P application and a +P treatment with continuous P fertilization (annual average 37 kg P ha−1). The critical Bray - P thresholds were 14.3, 12.5 and 19 mg kg−1 for soybean, maize and wheat, respectively. The rate of decline of the Bray - P pool in the −P treatments was described by an exponential decay function common to the five study sites. Obtained results indicated that a net extraction of 327 kg P per hectare is needed to reduce their initial Bray - P values by half, regardless of the initial soil Bray - P value. The soils fertilized with P showed a significant and linear increase in Bray - P. It was possible to fit a single function after pooling the data of the five sites. This combined function indicated that 3.2 kg P ha−1 were necessary to increase Bray - P in 1mg kg−1. Obtained data on crop P critical levels and rates at which soil - test P declines or increases according to the P balance constitutes a useful tool for sustainable use of P resources in Mollisols and related soil units. They can help to monitor future changes of soil P levels and to estimate the P demand of croplands. 
650 |2 Agrovoc  |9 26 
653 |a SOIL TEST PHOSPHORUS 
653 |a PHOSPHORUS BALANCE 
653 |a LONG - TERM EXPERIMENTS 
653 |a P FERTILIZATION 
653 |a BRAY - P 
700 1 |a Sucunza, Florencia A.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina.   |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.  |u CONICET - Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.  |9 67769 
700 1 |9 6387  |a Gutiérrez Boem, Flavio Hernán  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.  |u CONICET - Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina. 
700 1 |9 9707  |a García, Fernando Oscar  |u International Plant Nutrition Institute (IPNI). Latin America Southern Cone, Argentina. 
700 1 |a Boxler, Miguel  |u Consultor privado. Cordoba, Argentina.  |9 28486 
700 1 |9 6390  |a Rubio, Gerardo  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina.  |u CONICET - Universidad de Buenos Aires. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales (INBA). Buenos Aires, Argentina. 
773 0 |t European journal of agronomy  |g Vol.96 (2018), p.87-95, tbls., grafs.  |w SECS000534 
856 |f 2018sucunza  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2018sucunza.pdf  |x ARTI201808 
856 |z LINK AL EDITOR  |u http://www.elsevier.com 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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