Record ID No. |
3231 |
Author(s) |
Curaqueo G., Acevedo E., Cornejo P., Seguel A., Rubio R., Borie F. , 2010. |
Affiliation |
1Center of Amelioration and Sustainability of Volcanic Soils, BIOREN-UFRO, Universidad de La Frontera. Casilla 54-D, Temuco, Chile. email:(Borie F) fborie@ufro.cl |
Title |
Tillage effect on soil organic matter, mycorrhizal hyphae and aggregates in a Mediterranean agroecosystem |
Source. Vol.(no):Page |
Revista de la Ciencia del Suelo y Nutricion Vegetal. 10(1): 12-21p |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Soil plant relations |
Sub-subjects |
Cropping effect |
Host |
Triticum aestivum, Zea mays |
Organism |
AMF |
Country |
Chile, S. America. |
Abstracts |
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. |