FRANCIANE LEMES DOS SANTOS
Abstract:
The activity of soil microorganisms is influenced by various ecosystem processes, and this activity can show whether soil management is appropriate for plant development and maintenance of soil quality. The aim of this work was to evaluate the effect of liming application in different production systems on the biochemical indicators of a dystrophic Red Latosol in southwestern Goiás. The experiment was carried out at COMIGO experimental field in Rio Verde - GO, in dystrophic Red Latosol. The experimental design was a randomized complete block in a 2x4 factorial scheme, in split plots, with the soil corrections (surface split and total dose incorporated) and the subplots four crop production systems (S1-Urochloa brizantha/Soybean); S2- Spontaneous vegetation/Soybean, S3- Single corn/Soybean; S4- Corn + Urochloa ruziziensis/Soybean), with four replications. Soil collections were performed in December 2011 and August 2012. From the results it can be observed that the application forms of limestone did not interfere in the evaluated biochemical attributes, except for the phosphatase activity after 4 years of no-tillage implementation. Crop production systems altered the biochemical attributes: respiration and the activity of the enzymes hydrolysis of fluorescein diacetate and acid phosphatase, with the plots with the presence of Urochloa benefiting soil microbiota activity. It can also be observed that the harvest period provided better results in the studied attributes due to temperature and humidity conditions.
