Summary
This three-year field study evaluated how intercropping systems with Urochloa species (brachiaria) under no-tillage influence soil biological attributes in soybean-corn/sorghum rotations in southwest Brazil. The research demonstrates that intercropping management significantly affects soil microbial biomass, respiration, and enzymatic activity, with β-glucosidase and arylsulfatase enzymes emerging as the most sensitive biological indicators of management effects, though arylsulfatase showed variable sensitivity by site and year.
UK applicability
Direct application to UK conditions would be limited due to substantial differences in climate, soil type, and crop suitability; however, the methodological approach to assessing biological responses to cover cropping under reduced-tillage systems could inform UK soil health monitoring protocols, particularly for rotation systems incorporating forage legumes or grasses.
Key measures
Microbial biomass carbon, microbial biomass nitrogen, basal soil respiration, metabolic quotient (qCO2), microbial quotient (qMic), β-glucosidase, arylsulfatase, acid phosphatase, urease, fluorescein diacetate activity
Outcomes reported
The study evaluated multiple soil biological attributes (microbial biomass carbon and nitrogen, basal respiration, metabolic quotient, and enzymatic activity) across three years in no-tillage systems with different intercropping treatments in southwest Goiás. Management and intercropping systems significantly influenced microbial biomass, respiration rates, and enzymatic activity, with β-glucosidase and arylsulfatase identified as sensitive indicators.
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