Arbuscular Mycorrhizal fungi community, nutrient availability and soil glomalin in organic farming
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 1
Abstract
Organic agriculture promotes the use of agronomic practices and alternative technologies in accordance with the socioeconomic and ecological conditions, which is usually carried out by applying organic materials. Soil microbial communities have been considered a vital factor for the functioning of agroecosystems and success in organic farming. Among the soil microbial communities, Arbuscular mycorrhizal fungi (AMF) is key component of the soil microbiota, fundamental for soil fertility, plant nutrition and functioning of agroecosystems. Have been mentioned that, organic farmers manage for high soil organic matter (SOM). Furthermore, use of chemical materials, which can negatively impact soil biota, is also prohibited. As a consequence, soil microbial communities such as AMF are often higher in organic farming systems than conventional ones. Increasing in soil content of Arbuscular mycorrhizal fungi will be improve the efficiency of nutrient uptake, such as immobile phosphate ions. Which it seems that this improvement in nutrient availability could be important, especially in low nutrient status soils. Whereas glomalin is produced by Arbuscular mycorrhizal fungi, so it seems that with Increasing in Arbuscular mycorrhizal fungi content and activity, the concnetraion of glomalin in soil increace as well. As a consequence, high levels of glomalin result in better soil aggregate formation, which is important for soil structure and stability. In general, it seems that agricultural practices (organic farming in comparison with conventional farming) significantly can affect the Arbuscular mycorrhizal fungi communities and follow that the other agents which are in associated with AMF is affected as well.
Authors and Affiliations
Jasem aminifar, Alireza sirousmehr
Keywords
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