Topsoil hardening effects on soybean root architecture and water extraction patterns

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Topsoil hardening is one of the major causes of poor root growth although its effects on subsoil roots are still not well-known. Our aim was to examine the effects of topsoil hardening on the growth and functioning of shallow and deep roots of soybean plants. Two rain shelter experiments were conduc...

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Detalles Bibliográficos
Otros Autores: Peralta, Guillermo Ezequiel, Taboada, Miguel Angel, Kantolic, Adriana Graciela, Rubio, Gerardo
Formato: Artículo
Lenguaje:Inglés
Materias:
SOIL PHYSICAL DEGRADATION
SOIL MECHANICAL IMPEDANCE
ROOT ARCHITECTURE
WATER UPTAKE
ROOT DEVELOPMENT
NO-TILLAGE
SOYBEAN
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2020peraltaguillermo.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 10.1007/s42729-020-00286-y 
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245 1 0 |a Topsoil hardening  |b effects on soybean root architecture and water extraction patterns 
520 |a Topsoil hardening is one of the major causes of poor root growth although its effects on subsoil roots are still not well-known. Our aim was to examine the effects of topsoil hardening on the growth and functioning of shallow and deep roots of soybean plants. Two rain shelter experiments were conducted in two consecutive years. Plants were grown in topsoil monoliths (0–20 cm) with low (LR) or high mechanical resistance (HR), extracted from adjacent no-tillage cropping fields, and placed above 180 cmhigh containers filled with a sandy loam soil. The effects of topsoil hardening were largely regulated by the level of water stress. In stressed plants, HR conditions reduced total aboveground biomass (up to 13%), total root biomass, root length density, and root surface area (up to 23, 38, and 37% respectively). Mechanical impedances reduced root biomass and length in both shallow (0–20 cm) and very deep layers (+ 160 cm). No changes were observed in specific root length or specific surface area. Plants growing in HR topsoils showed lower total water rxtraction but greater specific water uptake rates (29–47% higher in year 1 and 2 respectively). No clear architectural (i.e., root fensity) or morphological (i.e., specific root length/area) tesponses of enhanced root foraging capacity were observed in subsoil roots. However, soybean root system responded through functional mechanisms (i.e., specific water uptake) which partially attenuated the negative effects of mechanical impedances. 
650 |2 Agrovoc  |9 26 
653 |a SOIL PHYSICAL DEGRADATION 
653 |a SOIL MECHANICAL IMPEDANCE 
653 |a ROOT ARCHITECTURE 
653 |a WATER UPTAKE 
653 |a ROOT DEVELOPMENT 
653 |a NO-TILLAGE 
653 |a SOYBEAN 
700 1 |a Peralta, Guillermo Ezequiel  |u CONICET. Buenos Aires, Argentina.  |9 27260 
700 1 |a Taboada, Miguel Angel  |u CONICET. Buenos Aires, Argentina.  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Suelos. Hurlingham, Buenos Aires, Argentina.  |9 9839 
700 1 |a Kantolic, Adriana Graciela  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cultivos Industriales. Buenos Aires, Argentina.  |9 22173 
700 1 |9 6390  |a Rubio, Gerardo  |u CONICET. 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.  |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. 
773 |t Journal of Soil Science and Plant Nutrition  |g Vol.20, no.4 (2020), p.2182-2194, tbls., grafs. 
856 |f 2020peraltaguillermo  |i En Reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2020peraltaguillermo.pdf  |x ARTI202103 
856 |u http://www.springer.com/  |z LINK AL EDITOR 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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