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Aggregation agents and structural stability in soils with different texture and organic carbon contents Scientia Agricola
Carrizo,María Eugenia; Alesso,Carlos Agustín; Cosentino,Diego; Imhoff,Silvia.
The flat pampas in the state of Santa Fe in Argentina have soils with high silt content, variable carbon content, and diverse degrees of structural degradation. Aggregate stability has been used as an indicator of the structural condition of the soil. This study aimed to quantify the effect of the addition of crop residues and root activity on the agents of aggregation and mechanisms of aggregate breakdown in soils with different carbon contents and textures cultivated under no-till. An experimental trial was conducted on a loamy soil (Typic Hapludoll, Santa Isabel series) and a silty soil (Typic Argiudoll, Esperanza series) under controlled conditions for 112 days with the following treatments: (i) with and without wheat plant growth and (ii) with and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glomalin; Carbohydrates; Crop residues; Active roots.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100075
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Arbuscular mycorrhizal fungal communities and soil aggregation as affected by cultivation of various crops during the sugarcane fallow period Rev. Bras. Ciênc. Solo
Truber,Priscila Viviane; Fernandes,Carolina.
Management systems involving crop rotation, ground cover species and reduced soil tillage can improve the soil physical and biological properties and reduce degradation. The primary purpose of this study was to assess the effect of various crops grown during the sugarcane fallow period on the production of glomalin and arbuscular mycorrhizal fungi in two Latosols, as well as their influence on soil aggregation. The experiment was conducted on an eutroferric Red Latosol with high-clay texture (680 g clay kg-1) and an acric Red Latosol with clayey texture (440 g kg-1 clay) in Jaboticabal (São Paulo State, Brazil). A randomized block design involving five blocks and four crops [soybean (S), soybean/fallow/soybean (SFS), soybean/millet/soybean (SMS) and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glomalin; Hyphae; Eutroferric Red Latosol; Acric Red Latosol.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200006
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ARBUSCULAR MYCORRHIZAL FUNGI AND SOIL AGGREGATION R.C. Suelo Nutr. Veg.
Borie,Fernando; Rubio,Rosa; Morales,Alfredo.
Soil aggregation is governed by several biotic and abiotic components including land-use management. Aggregation is essential to maintain soil physical properties and facilitate biogeochemical cycling. Hyphae of arbuscular mycorrhizal fungi (AMF) are considered to be primary soil aggregators and there is a positively correlation between AMF hyphae and aggregate stability in natural systems. Recent evidence suggests that glomalin (GRSP), a glycoprotein produced by AMF hyphae which has a cementing capacity to maintain soil particles together, is mainly involved in such aggregation. However, recently controversial results together with reported shortcoming in glomalin determinat suggest to proceed with caution when studying glomalin in connection with soil...
Tipo: Journal article Palavras-chave: Arbuscular mycorrhizal fungi; Soil aggregates; Glomalin.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000200003
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Arbuscular mycorrhizal fungi within agroforestry and traditional land use systems in semi-arid Northeast Brazil - doi: 10.4025/actasciagron.v35i3.16213 Agronomy
Sousa, Carla Silva; Universidade Federal de Pernambuco; Menezes, Rômulo Simões Cezar; Universidade Federal de Pernambuco; Sampaio, Everardo Valadares de Sá Barretto; Universidade Federal de Pernambuco; Lima, Francisco Sousa; Universidade Federal do Recôncavo da Bahia; Oehl, Fritz; Agroscope Reckenholz-Tänikon Research Station; Maia, Leonor Costa; Universidade Federal de Pernambuco.
The diversity of arbuscular mycorrhizal fungi (AMF) can be a critical factor in enhancing both the productivity and the diversity of plants in ecosystems, and the plants in the ecosystem also strongly influence the occurrence of these fungi. The relationships between different land use systems and AMF communities in the semi-arid region of the State of Paraíba, NE Brazil were evaluated. The experiment followed a split-plot randomized block design, with four replicates. The main plots were defined by the presence or absence of trees (gliricidia and maniçoba), while the split plots were defined by three land use systems: 1) traditional cropping of maize + beans, 2) buffel grass pasture, and 3) prickly pear forage crop. The presence of trees increased...
Palavras-chave: Ciencia do solo; Microbiologia agrícola mycorrhizae; Agroecosystems; Glomalin.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16213
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Effect of Compost Application on Some Properties of a Volcanic Soil from Central South Chile Chilean J. Agric. Res.
Valarini,Pedro José; Curaqueo,Gustavo; Seguel,Alex; Manzano,Karina; Rubio,Rosa; Cornejo,Pablo; Borie,Fernando.
Soil compost application is a common soil management practice used by small farmers of Central-South Chile that produces positive effects on soil properties and also promotes presence and activity of arbuscular mycorrhizal fungi (AMF). This fungi form symbiosis with plant roots improving plant nutrition, as well as producing glomalin, a glycoprotein that has been associated with soil aggregation stability. Therefore, the aim of this study was to evaluate, in an Ultisol from Central-South Chile, the effect of different doses of compost on some soil characteristics at the end of the third year of a crop sequence including wheat (Triticum aestivum L.), bean (Phaseolus vulgaris L.), and grassland (Lolium multiflorum Lam. associated with Trifolium repens L.)....
Tipo: Journal article Palavras-chave: Compost; Glomalin; Soil aggregation; Ultisol.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300015
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High rates of agricultural gypsum affect the arbuscular mycorrhiza fungal community and coffee yield Repositório Alice
GOGO, F. D.; SAGGIN JUNIOR, O. J.; GUIMARÃES. P. T. G.; SIQUEIRA, J. O.; CARNEIRO, M. A. C.
High rates of agricultural gypsum, above the recommended levels, have been used on a regular basis to deepen plant roots and to alleviate recurrent water stress in Cerrado areas. However, very little is known about the consequences of this practice to arbuscular mycorrhizal fungi (AMF). Therefore, the objective of this study was to evaluate whether or not applying high rates of agricultural gypsum affects the mycorrhizal fungi community, glomalin content and coffee yield. The study rates were: 0; 3.5; 7.0; 14 and 56 t·ha-1 of agricultural gypsum applied in the planting row of the coffee plantation on top of the previous recommended gypsum application. Samples were collected for analysis at the depths of 0-20, 20-40 and 40-60 cm at the end of dry and rainy...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Coffea Arábica; Cerrado; Glomalin; Gypsum.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1126810
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Spatial variability of microbial biomass and organic matter labile pools in a haplic planosol soil Bragantia
Loureiro,Diego Campana; De-Polli,Helvécio; Ceddia,Marcos Bacis; Aquino,Adriana Maria de.
The objective of this work was to study the spatial variability of soil microbial biomass (SMB) and labile soil organic matter pools (labile SOM), under different management systems and plant cover. The experiment was conducted in a Haplic Planosol soil on an Integrated Agroecological Production System (SIPA), in Seropédica, Rio de Janeiro. The evaluated management systems were: alley cropping, pasture, and bush garden, the late one was used as reference area. Three grids of regular spacing of 2.5 x 2.5 meters were used for sampling, consisting of 25 georeferenced points each, where soil samples were taken at 0-10 cm depth. The following labile constituents of soil organic matter were determined: free light fraction (FLF), water soluble C and N, C and N of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Organic carbon; Geoestatistic; Glomalin; Precision agriculture.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500010
Registros recuperados: 7
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