Influence of edaphic/climatic factor on microbial population in arid soils with irrigated agriculture

Authors

  • Lujan Masseroni Agencia de Extensión Rural –Instituto Nacional de Tecnología Agropecuaria- 25 de Mayo, La Pampa. Estación Experimental Agropecuaria-Anguil.
  • María Micaela Pérez Estación Experimental Agropecuaria Anguil - Instituto Argentina de Tecnología Agrpecuaria https://orcid.org/0000-0001-5556-686X
  • Paolo Daniel Sartor Agencia de Extensión Rural –Instituto Nacional de Tecnología Agropecuaria- 25 de Mayo, La Pampa. Estación Experimental Agropecuaria-Anguil. General Pico 720
  • Laura Marcela Rörig Centro de Investigaciones en Recursos Naturales - Instituto Nacional de Tecnología Agropecuaria - Castelar.
  • Luciano José Merini Estación Experimental Agropecuaria Anguil – Instituto Nacional de Tecnología Agropecuaria - Consejo Nacional de Investigaciones Cinentíficas y Técnicas

Keywords:

Biological activity, Irrigation, Arid ecosystems

Abstract

The agricultural frontier over the arid marginal zones is steadily expanding by means of irrigation technology. Considering the impact of bacterial population and its biological activity on soil homeostasis, information on soil biodiversity and its biological activity are a significant input to maximize the production with minimal impact on these susceptible environments. The aim of this exploratory work was to assess the effect of long term agricultural practices (30 years) on the activity and structural aspects of the microbial community from arid irrigated agricultural soils. For this, three environments were evaluated, collecting samples of a Pristine arid soil (without irrigation and undisturbed) and two different irrigated agricultural (Alfalfa and Corn) throughout the 2014-2015 season.For this, samples from Pristine (without irrigation) arid soil and (Alfalfa and Corn) were collected along the 2014-2015 season. Soil physicochemical analysis was performed, temperature and humidity were recorded, as well as total biological activity (FDA hydrolysis test) and molecular fingerprinting (DGGE and T-RFLP) for each treatment. Soil physicochemical analysis show that agricultural practice improved the edaphic properties like organic matter level, although the contribution of water in limited quantities (pressurized irrigation) an increase in electrical conductivity. Total biological activity along the seasons showed similar profiles for all scenarios, and the coldest/unirrigated and hottest/irrigated-rainy monthsshowed the lowest and highest activities respectively. Overall, the Pristine condition presented significantly lower biological activity levels along the season. The DGGE fingerprint showed a discrete pattern with low number of bands and, against expected, showed no differences between the three scenarios. Subsequent T-RFLP analysis confirmed that soil bacterial biodiversity was not modified by decades of intensive irrigated agricultural activity.      

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Published

2021-12-30

How to Cite

Masseroni, L., Pérez, M. M., Sartor, P. D., Rörig, L. M., & Merini, L. J. (2021). Influence of edaphic/climatic factor on microbial population in arid soils with irrigated agriculture. Boletín Geográfico, 43(2). Retrieved from https://revele.uncoma.edu.ar/index.php/geografia/article/view/3571

Issue

Vol. 43 No. 2 (2021): Boletín Geográfico 43(2)

Section

Land, Geomorphology and Natural Resources

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