El papel de las raíces y la microbiota en la estabilidad y fertilidad de suelos volcánico-arenosos del Valle de México
Keywords:
suelos volcánicos, comunidad bacteriana, comunidad fúngica, raíces, agregación, volcanic soil, bacterial community, fungal community, roots, aggregation, sols volcaniques, communauté bactérienne, communauté fungique, racines, agrégationAbstract
Abstract. The biological components of soil are fundamental in agroecosystems because they play a crucial role in the decomposition of organic matter and the nutrient cycles. Biological processes in volcanic sandy soil of the Mexico Valley are poorly understood. This paper presents results on the role of the roots of four plant species and of the microbial community in relation to structural stability and biological soil quality. It was noted that: a) the fine roots of maize and Bermuda grass are more capable than those of sunflower and amaranth to trap particles of sand and silt; b) the community of amaranth showed the highest content of Cmic (almost 50% higher than the maize) and the highest dehydrogenase activity (almost 40% more than maize), c) the potential to produce extracellular enzymes showed microbial heterotrophic communities with capacity to produce O2 partial pressure from 4 to 21%, d) fungal and bacterial communities generally have a similar structure in all the rhizosphere.
