Summary
This field experiment evaluates the competing agronomic strategies of straw incorporation and crop rotation for managing soil nitrogen cycling in cereal systems. The findings indicate that straw return exerts a stronger effect than rotation pattern alone on soil nitrogen fractions and associated gaseous losses. The work suggests organic matter management may be a more effective lever than crop diversification alone for regulating nitrogen availability and reducing environmental losses under the study conditions.
UK applicability
UK cereal growers may find these findings relevant given similar climatic and soil conditions, though results from China should be validated under British soil types and temperature regimes. Straw management options in the UK are constrained by economic incentives (anaerobic digestion, biofuel markets) and regulatory frameworks, which may limit the practical uptake of straw return strategies identified as optimal here.
Key measures
Soil nitrogen fractions (likely inorganic and organic N pools), gaseous nitrogen emissions (N₂O, NH₃, or NOₓ), crop rotation pattern variables, straw incorporation rates
Outcomes reported
The study measured soil nitrogen fractions and quantified gaseous nitrogen losses under different straw management and crop rotation regimes. It compared the relative importance of straw return versus rotation pattern in controlling nitrogen cycling in cereal-based systems.
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