Tesis doctoral Ferrero Holtz Esteban W Glomalina (GRSP) Indicador biolgico del suelo. Su rol en la relacin suelo-planta-animal-1
A healthy agricultural soil consists of a stress-resilient system due to its biological diversity, active nutrient cycling, and high physical stability. The activity of bacteria and fungi are the\nmost important components in the processes of humification and physical stability of the soil, being ar...
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| Formato: | Tesis doctoral acceptedVersion |
| Lenguaje: | Español |
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Universidad de Buenos Aires. Facultad de Ciencias Veterinarias
2023
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| Acceso en línea: | http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=avaposgra&cl=CL1&d=HWA_7246 https://repositoriouba.sisbi.uba.ar/gsdl/collect/avaposgra/index/assoc/HWA_7246.dir/7246.PDF |
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| Sumario: | A healthy agricultural soil consists of a stress-resilient system due to its biological diversity, active nutrient cycling, and high physical stability. The activity of bacteria and fungi are the\nmost important components in the processes of humification and physical stability of the soil, being arbuscular mycorrhiza (AMF) the fungi that stand out. AMF synthesize a glycoprotein\ncalled glomalin predominantly present in the mycelium. The term GRSP (glomalin-related soil protein) is used to refer to the generic product of the pool of proteins extracted and\nquantified from the soil, being the most used to estimate the level of glomalins in a soil. The\ngeneral objective of the project is to evaluate the content of glomalin GRSP, produced by\nAMF, as a biochemical variable related to the productivity of soils with a low content of clay\nfraction, nutrients and structural fragility. The objective is to estimate the quantitative\nparticipation of GRSP in soil organic carbon, its impact on edaphic stability and the\nconsequences on the net primary productivity and quality of forage resources together with\nits ruminal and enzymatic digestibility. Four tests were carried out, three manipulative and one measurative under controlled and production conditions. The GRSP values presented a positive linear relationship with respect to the organic carbon in two different essays (R2=0,93 and R\n2=0,60), the GRSP / Cox values had a negative linear behavior with respect to the organic carbon (R2=0,71). In addition, a positive linear correlation was observed between the weighted mean diameter and GRSP (R2=0,59), the inoculation with AMF presented significant\neffects on GRSP (p<0.05), foliar phosphorus (p<0.05) and aerial biomass(p<0.1). No significant differences were observed in digestibility, ruminal degradability, fiber in acid detergent, fiber\nin neutral detergent and lignin in acid detergent for aerial biomass. These results indicate that GRSP could be considered a biological soil indicator, being the accumulation of soil carbon\nsimultaneous with the enrichment of GRSP. The GRSP content and the ratio of GRSP to organic carbon (GRSP / Cox) could be considered indicators of the soil structure. Inoculation with AMF spores generated significant increases in the contents of GRSP, aerial biomass and foliar\nphosphorus of Festuca arundinacea without the addition of fertilizer. |
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