Mycorrhizal inoculation and application of cattle manure in field-grown maize in semiarid conditions

Abstract

We evaluated the effects of cattle manure and inoculation with arbuscular mycorrhizal fungi (AMF) in maize plants growing in a semiarid area of Brazilian north-east in 2012 and 2013. Three isolates of AMF (Acaulosporalongula URM-FMA 07 and URM-FMA 03, Claroideoglomusetunicatum UNIVASF 06A) were used, with or without the application of cattle manure, during two growing cycles. In the first year, significant effects of inoculation were detected for straw yield only when the manure was applied. In the second year, there was an interaction between fertilisation and inoculation for plant height and grain yield, with the highest values in the fertilised treatments. Inoculation with A. longula demonstrated that mycorrhizal inoculation in field-grown plants could be an alternative management for improving plant growth and grain yield, reducing the use of cattle manure. The AMF sporulation and mycorrhizal colonisation were improved after inoculation, and A. longula URM-FMA 07 increased sporulation by more than 15 times while inoculation with C. etunicatum increased sporulation by more than 3 times. The mycorrhizal inoculation is a management practice that can be useful for recovering or maintaining AMF infective propagules in soil, showing potential to be used in large-scale field conditions in Brazilian semiarid. Although mycorrhisation presents high agricultural relevance due to benefits promoted to the soil and plants, the knowledge about the factors influencing the interactions among microorganisms, soil and plants need to be broadened aiming to achieve successful crop management in semiarid regions.

Establishment and production of Torch Ginger plants associated with arbuscular mycorrhizal fungi inoculation

“…---spore 100 g-1 soil -----------% -------- In a field experiment, Lino et al ( 2018) also found higher percentages of mycorrhizal colonization in corn roots that had been inoculated at sowing with Acaulospora longula and Claroideoglomus etunicatum (= Entrophospora etunicata) (mean of 72%) compared to non-inoculated ones (mean of 54%). Although mycorrhizal colonization in inoculated plants, both in our study and in Lino et al (2018), was higher than in non-inoculated plants, it is not possible to attribute these percentages to the inoculum used, since the technique used to evaluate mycorrhizal colonization does not allow the identification of the AMF inoculated. In addition, AMF species from the native community can colonize the roots of these plant species, as observed by the percentages found in non-inoculated plants.…”

Mitigating Climate Change: The Influence of Arbuscular Mycorrhizal Fungi on Maize Production and Food Security

“…Nutrient uptake (p) Increased -N; P; K; Ca; Mg; Na [37,186,[207][208][209][210][211][212][213][214][215][216][217][218][219][220][221][222][223] Nutrient uptake (f) Increased -P; K; Ca; Mg; Fe [221,[224][225][226] Vegetative growth (p) Increased -shoot and root biomass; root length; plant, leaf and tassel length; stem girth [186, 203, 205, 206-209, 211, 213, 214, 216, 219, 221-229] Vegetative growth (f) Increased -shoot and root biomass; root length; plant height; leaf mass and area [217,221,224,226,[230][231][232][233][234] Yield (p) Increased -cob and grain yield; number of grains per cob [215,221,[235][236][237] Yield [86,266], while for glomalin, it varies from 6 to 42 years [120]. The effects of AM fungi on soil aggregation are probably more easily detected in nutrient-poor soils with neutral or alkaline soil pH [268].…”