Silvina Inés Golik

Effects of Inoculation with Glomus mosseae in Conventionally Tilled and Nontilled Soils with Different Levels of Nitrogen Fertilization on Wheat Growth, Arbuscular Mycorrhizal Colonization, and Nitrogen Nutrition

Evaluation of the performance of inoculants in undisturbed and unsterilized soils, where diverse communities of microorganisms are present, is a necessary step before using arbuscular mycorrhizal fungi (AMF) in agricultural technology. The effects of inoculation with Glomus mosseae on arbuscular mycorrhizal colonization, growth, and nitrogen (N) uptake of wheat plants in unsterilized tilled and untilled soils from the Argentinean Pampas with different levels of N fertilization were assessed. The fertilization and inoculation effects depended on the tillage treatments. In no-tillage, the colonization was greater than in conventional tillage, but it was reduced by the N fertilization. In conventional tillage, the inoculation with G. mosseae increased colonization. Both conventional tillage and N fertilization promoted wheat root growth. Inoculation did not affect root growth but enhanced N concentration in roots when fertilizer was not applied.

Acumulación, removilización, absorción postantesis y eficiencia de utilización de nitrógeno en trigo bajo diferentes labranzas y fertilizaciones

-1 de N como urea a la siembra, aplicacion de 90 kg ha -1 de N como nitrato de amonio calcareo a la siembra y aplicacion de N como urea y como nitrato de amonio calcareo en dosis de 45 kg ha -1 a la siembra mas 45 kg ha -1 a fin de macollaje, respectivamente. Se encontraron diferencias en el N acumulado entre sistemas de labranzas; con cincel se acumulo 18 kg ha -1