| Registro completo |
| Provedor de dados: |
R.C. Suelo Nutr. Veg.
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| País: |
Chile
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| Título: |
TILLAGE EFFECT ON SOIL ORGANIC MATTER, MYCORRHIZAL HYPHAE AND AGGREGATES IN A MEDITERRANEAN AGROECOSYSTEM
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| Autores: |
Curaqueo,Gustavo
Acevedo,Edmundo
Cornejo,Pablo
Seguel,Alex
Rubio,Rosa
Borie,Fernando
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| Data: |
2010-01-01
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| Ano: |
2010
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| Palavras-chave: |
Agroecosystem Glomalin Related Soil Protein
Mollisol Organic Matter Fractions Soil Aggregates
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| Resumo: |
Arbuscular mycorrhizal fungi (AMF) and their product glomalin (GRSP) play a decisive role in the soil aggregation, affecting the carbon (C) dynamics in agroecosystems. Tillage affects the AMF activity and GRSP content, influencing the stability and the soil C forms as well. The aim of this study was to compare the effect of no tillage (NT) and conventional tillage (CT) on: i) arbuscular mycorrhizal hyphal length and GRSP content; ii) the nature of soil organic matter by means of physical fractionation (free paniculate organic matter [fPOM]; occluded paniculate organic matter [oPOM] and mineral-associated soil organic matter [Mineral]), as well as chemical fractionation (fulvic acid, humic acid and humin), and iii) the relationships between AMF parameters, soil carbon and water stable aggregates (WSA) in a Mollisol of Central Chile managed for 6 years under NT and CT using a wheat-corn rotation. Higher values in the AMF hyphal length, GRSP and WSA in NT compared with CT were observed. Significant relationships were found between GRSP and WSA (r = 0.66, p < 0.01) and total mycelium and GRSP (r = 0.58, p< 0.05). The total carbon increased 44% under NT compared with CT. The chemical fractionation showed percentage greater than 95% for humim in both treatments. Physical fractionation indicates that the higher part of the SOC (89.4 - 95.1%) was associated with the mineral fraction.
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| Tipo: |
Journal article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100002
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| Editor: |
Sociedad Chilena de la Ciencia del Suelo
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| Formato: |
text/html
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| Fonte: |
Revista de la ciencia del suelo y nutrición vegetal v.10 n.1 2010
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