Influence of a tropical grass (Brachiaria brizantha cv. Mulato) as cover crop on soil biochemical properties in a degraded agricultural soil
| Autor: | Jose Manuel Meriles, Jorgelina Huidobro, Silvina Vargas Gil, Carolina Pérez Brandan, Diego N. Chavarria, Cecilia Pérez Brandán |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Otras Ciencias Biológicas MONOCULTURE Soil Science Microbiology Ciencias Biológicas 03 medical and health sciences SUSTAINABILITY MACRONUTRIENTS Cover crop biology business.industry Agroforestry 04 agricultural and veterinary sciences biology.organism_classification Brachiaria 030104 developmental biology Agronomy Agriculture Insect Science SOIL FUNCTIONALITY 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Monoculture business ENZYMES CIENCIAS NATURALES Y EXACTAS |
| Popis: | The inclusion of tropical grass forage as a cover crop (CC) could be a useful tool to improve microbiological activity and, consequently, soil quality. The aim of this study was to evaluate the effect of Brachiaria brizantha cv. Mulato and maize (Zea mays) as CC on soil microbial communities and their contributions to a degraded common bean (Phaseolus vulgaris L.). monoculture system. Soil sampling was carried out in 2016 after six years of cumulative effect across different treatments: B. brizantha-B. brizantha-common bean (B2), B. brizantha-common bean (B1), maize-common bean (M) and common bean monoculture (control). B2 and B1 showed higher fluorescein diacetate hydrolysis (108.1% and 78.6%, respectively) and higher acid phosphatase activity (304.5% and 181.6%, respectively) compared with the control treatment. The metabolic efficiency was higher in treatments containing B. brizantha as CC, with a significantly lower metabolic quotient (respiration rate per unit microbial biomass carbon) in B2 (1.65) compared with the control (5.46). The B2 treatment also showed higher values of soil organic carbon, which was correlated with soil microbial activities. In contrast, qPCR analysis of microbial structure did not show significant differences in response to the evaluated treatments. Thus, fungal and bacterial abundance probably had less influence on the differentiation of treatments compared to microbial activity and soil chemical properties. In context of this research, the use of B. brizantha as CC increased soil fertility and generated a greater microbial metabolic efficiency. Our research demonstrates that B. brizantha cv. Mulato as CC is a suitable agricultural tool to restore soil biochemical properties. Fil: Perez Brandan, Carolina Gabriela. Instituto Nacional de Tecnología Agropecuaria; Argentina Fil: Chavarría, Diego Nicolás. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigaciones Agropecuarias. Instituto de Patología Vegetal; Argentina Fil: Huidobro, Jorgelina. Instituto Nacional de Tecnología Agropecuaria; Argentina Fil: Meriles, Jose Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina Fil: Pérez Brandan, Cecilia María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Patología Experimental. Universidad Nacional de Salta. Facultad de Ciencias de la Salud. Instituto de Patología Experimental; Argentina Fil: Vargas Gil, Silvina. Instituto Nacional de Tecnología Agropecuaria; Argentina |
| Databáze: | OpenAIRE |
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