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Influence of glyphosate and nitrogen fertilization on microbial biomass and respiration in a Peruvian high Andean soil
DOI:
https://doi.org/10.26490/puca.v1i1.1929Keywords:
Glyphosate, Nitrogen, CBM, RBSAbstract
The effect of glyphosate and nitrogen fertilization on the biomass and microbial respiration of a Peruvian high Andean soil was determined using a soil from the locality of Pasos, Huancayo, Junín. A completely randomized experiment was designed in a 5x4 factorial arrangement with 5 doses of glyphosate (0, 4, 8, 8, 16 and 32 liters i.a./Ha) and 4 levels of nitrogen fertilization (0, 250, 500 and 1000 mg N/kg of soil), with 3 replications. The doses of N added to the high Andean soil caused increases in microbial biomass carbon (MBC ) and basal soil respiration (BSR), the increases in MBC were greater when glyphosate was applied, while the increase in the doses of N added to the soil caused decreases in the metabolic quotient (qCO2) and increases in the microbial quotient (qMIC). On the other hand, with the increase in glyphosate doses, they generated increases in the MBC as well as in the BSR; while the additions of glyphosate to the high Andean soil caused decreases in the qCO2 and increases in the qMIC.
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