Effects of soil physical and chemical parameters, and farm management practices on arbuscular mycorrhizal fungi communities and diversities in coffee plantations in Colombia and Mexico

Arbuscular mycorrhizal (AM) fungi are important for P uptake in Andisols cultivated with wheat. We assessed AM fungal diversity in field experiments established with wheat cultivated after AM host plants and non-host plants at three locations of the Araucanía Region. Wheat seed was treated with two natural products: Fosfobio (FOS), mixture of P-solubilizing bacteria and N 2 -fixing bacteria; and Myconate (MYC), product containing formononetin. For investigations of AM fungal diversity, soil samples were taken before planting and after harvest of wheat. The morphological spore analyses resulted in 26 species, belonging to 10 families and 16 genera; 5 species belonged to Acaulospora (31.2% of total), and 3 to Claroideoglomus (18.8%). Claroideoglomus claroideum was the prevalent while Ambispora leptoticha, Dominikia aurea, and Glomus badium presented the lowest frequency. The AM fungal species distribution was strongly dependent on the location, and richness at planting of wheat was higher when a non-host for AM fungi had been grown before. There appeared to be a tendency that through wheat cultivation, the richness of AM fungal species decreased from time of planting to harvest when the pre-crop was a non-host; when the pre-crop was AM host there was no apparent decrease in AM species richness through wheat cultivation. Natural products did not significantly influence grain yields. However, there was a tendency that MYC increased average grain yields by 7%. It is discussed that increased AM root colonization, as by MYC and improved P-uptake by AM fungi is more important than inoculation of seed with P-solubilizing microbes.

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“…This confirms findings of other researchers about site specific AM fungal communities Posada et al, 2016).…”

Section: Discussionsupporting

confidence: 92%

Arbuscular mycorrhizal fungal diversity in wheat agro-ecosystems in Southern Chile and effects of seed treatment with natural products

Castillo

Oehl

Sieverding

2016

J. Soil Sci. Plant Nutr.

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“…However, they measured a higher abundance of certain rhizospheric fungi in P. euramevicana-based systems than in T. distichum-based systems. Finally, Posada et al (2018) evaluated the impact of management operations on AMF in coffee plantations of Mexico and Colombia characterized by contrasted management schemes from organic to the high use of fertilizers and pesticides. They found a great diversity of AMF in the different plantations, with limited influence of management intensity in Colombian plantations with richer soils and slightly improved diversity in Mexican plantations with poor acidic soils associated with light fertilizer usage.…”

Section: Agroforestry Improves Soil Biotamentioning

confidence: 99%

Agroforestry for soil health

2018

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“…Mycorrhiza as biotechnology in agriculture is considered one of the greatest pro-sustainability gains of the activity. Arbuscular mycorrhizal fungi (AMF) are obligatory biotrophic organisms that establish mutual associations with roots of most plants (JEFFRIES; BAREA, 2012) and are found naturally in coffee plantations (POSADA et al, 2018). However, some authors indicate the enrichment of the rhizosphere of coffee plants with selected AMF in order to take advantage of the benefits of symbiosis (FRANÇA et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi and Phosphorus Doses on Coffee Growth Under a Non-Sterile Soil

et al. 2019

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The use of mycorrhiza is a promising biotechnology that makes coffee cultivation sustainable in the use of fertilizers. In this sense, plant growth and phosphorus contents were assessed in coffee inoculated with Rhizophagus clarus, Claroideoglomus etunicatum and Dentiscutata heterogama in soil fertilized with 0, 0.74, 1.48 and 2.96 g P2O5 kg-1. The experimental design was a randomized block design in a 4 × 4 factorial scheme with four replications. The mycorrhizal seedlings were previously produced and later transplanted to pots, simulating the field planting. The assessments were performed 150 days after transplanting. All variables were influenced by inoculation, but the effects were dependent on P doses. P doses higher than 50% of the recommended dose (0.74 g P2O5 kg-1) decreased the benefit of mycorrhiza. The fungi Rhizophagus clarus and Claroideoglomus etunicatum promoted a higher growth of coffee plants when compared to non-inoculated plants in non-sterilized soils and with a reduction in the applied P.

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Effects of soil physical and chemical parameters, and farm management practices on arbuscular mycorrhizal fungi communities and diversities in coffee plantations in Colombia and Mexico

Cited by 30 publications

References 62 publications

Arbuscular mycorrhizal fungal diversity in wheat agro-ecosystems in Southern Chile and effects of seed treatment with natural products

Arbuscular mycorrhizal fungal diversity in wheat agro-ecosystems in Southern Chile and effects of seed treatment with natural products

Agroforestry for soil health

Arbuscular Mycorrhizal Fungi and Phosphorus Doses on Coffee Growth Under a Non-Sterile Soil

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