Structural characterization of a compacted alfisol under different tillage systems

Conservation tillage is a management system used to mitigate and rehabilitate the dryland areas of southern-central Chile in severely compacted soils. The objective of this study was to evaluate the soil physical properties in the root zone under an oat-wheat crop rotation after three years of the e...

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Autores principales:	Brunel-Saldias,N, Martínez,I, Seguel,O, Ovalle,C, Acevedo,E
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2016
Materias:	Subsoiling rooting porosity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000300010
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spelling	oai:scielo:S0718-951620160003000102017-02-07Structural characterization of a compacted alfisol under different tillage systemsBrunel-Saldias,NMartínez,ISeguel,OOvalle,CAcevedo,E Subsoiling rooting porosity Conservation tillage is a management system used to mitigate and rehabilitate the dryland areas of southern-central Chile in severely compacted soils. The objective of this study was to evaluate the soil physical properties in the root zone under an oat-wheat crop rotation after three years of the establishment of three tillage systems: conventional tillage (CT), zero tillage (ZT) and zero tillage with subsoiling (ZTS). Soil bulk density, porosity, water retention curve, stability of macro- and microaggregates, airflow at field capacity, rest coefficient, and number of roots were evaluated. The results showed that the soil had low water holding capacity in the profile due to the low water retention at the permanent wilting point (matric water potential lower than -1.500 kPa), associated with a high bulk density and clay content. The conservation tillage systems (ZT and ZTS), were similar in the parameters of fast drainage pores (FDP), aggregate stability index, airflow, and rest coefficient compared with CT. However, the volume of pores with diameters between 10-50 μm was higher in ZTS in a 24% and 13%, compared with ZT and CT, respectively. In addition, the root development increased significantly in ZTS. In conclusion, the physical condition of the compacted soil was improved by the zero tillage system with subsoiling, which promoted a better root system in the first horizons in highly compacted soils.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.16 n.3 20162016-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000300010en10.4067/S0718-95162016005000050
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Subsoiling rooting porosity
spellingShingle	Subsoiling rooting porosity Brunel-Saldias,N Martínez,I Seguel,O Ovalle,C Acevedo,E Structural characterization of a compacted alfisol under different tillage systems
description	Conservation tillage is a management system used to mitigate and rehabilitate the dryland areas of southern-central Chile in severely compacted soils. The objective of this study was to evaluate the soil physical properties in the root zone under an oat-wheat crop rotation after three years of the establishment of three tillage systems: conventional tillage (CT), zero tillage (ZT) and zero tillage with subsoiling (ZTS). Soil bulk density, porosity, water retention curve, stability of macro- and microaggregates, airflow at field capacity, rest coefficient, and number of roots were evaluated. The results showed that the soil had low water holding capacity in the profile due to the low water retention at the permanent wilting point (matric water potential lower than -1.500 kPa), associated with a high bulk density and clay content. The conservation tillage systems (ZT and ZTS), were similar in the parameters of fast drainage pores (FDP), aggregate stability index, airflow, and rest coefficient compared with CT. However, the volume of pores with diameters between 10-50 μm was higher in ZTS in a 24% and 13%, compared with ZT and CT, respectively. In addition, the root development increased significantly in ZTS. In conclusion, the physical condition of the compacted soil was improved by the zero tillage system with subsoiling, which promoted a better root system in the first horizons in highly compacted soils.
author	Brunel-Saldias,N Martínez,I Seguel,O Ovalle,C Acevedo,E
author_facet	Brunel-Saldias,N Martínez,I Seguel,O Ovalle,C Acevedo,E
author_sort	Brunel-Saldias,N
title	Structural characterization of a compacted alfisol under different tillage systems
title_short	Structural characterization of a compacted alfisol under different tillage systems
title_full	Structural characterization of a compacted alfisol under different tillage systems
title_fullStr	Structural characterization of a compacted alfisol under different tillage systems
title_full_unstemmed	Structural characterization of a compacted alfisol under different tillage systems
title_sort	structural characterization of a compacted alfisol under different tillage systems
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000300010
work_keys_str_mv	AT brunelsaldiasn structuralcharacterizationofacompactedalfisolunderdifferenttillagesystems AT martinezi structuralcharacterizationofacompactedalfisolunderdifferenttillagesystems AT seguelo structuralcharacterizationofacompactedalfisolunderdifferenttillagesystems AT ovallec structuralcharacterizationofacompactedalfisolunderdifferenttillagesystems AT acevedoe structuralcharacterizationofacompactedalfisolunderdifferenttillagesystems
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Structural characterization of a compacted alfisol under different tillage systems

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