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Structural soil quality related to microbiological parameters in sugarcane
Dayane M Garcia1, Claudinei G Silva1, Vinicius R Lansa1
1Universidade Paranaense, Umuarama, PR, Brazil.
Anais Da Academia Brasileira De Ciencias
|July 30, 2020
Summary
Deep localized soil tillage in sugarcane crops impacts soil structure and microbial activity. While it increases microbial respiration, conventional tillage better supports microbial biomass and nitrogen, crucial for soil health and sustainability.
Area of Science:
- Agricultural Science
- Soil Science
- Microbiology
Background:
- Conventional tillage (CT) is being replaced by deep localized soil tillage (DLST) in sugarcane cultivation.
- Limited research exists on DLST's impact on soil quality and sustainability.
Purpose of the Study:
- To assess soil structural volumes under CT and DLST.
- To evaluate the effects of these tillage systems on soil microbiological parameters.
Main Methods:
- Study conducted on dystrophic Red-Yellow Latosol derived from Caiuá Sandstone formation, Brazil.
- Four trenches per system analyzed for cultural profile, carbon microbial biomass (CMB), nitrogen (NMB), basal respiration (BR), and metabolic quotient (qCO2).
Main Results:
- CT profiles showed more cracked soil volumes with higher CMB and NMB.
- DLST profiles exhibited predominantly free, porous soil volumes.
- Higher microbial activity (BR, qCO2) observed in DLST's free powdery soil.
Conclusions:
- DLST may negatively impact soil functionality, increasing erosion risk and causing microbial metabolic stress.
- CT appears more beneficial for maintaining soil microbial biomass and nitrogen levels.
