Agricultural and Biological Sciences
8 years ago

Straw returning in dryland soil raises risk of nitrogen leaching.

Acta Agriculturae Boreali-Sinica
Effect of Long-term Straw Returning on Distribution and Accumulation of Nitrate Nitrogen in Dryland Soil
Xie Wen-yan

Paper Summary

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Long-term straw returning in dryland soil can increase crop production but also lead to higher nitrate nitrogen accumulation, raising the risk of nitrogen leaching. Different straw return methods affect the distribution of nitrate nitrogen in soil, with the treatment of straw return after livestock digestion showing the highest accumulation at depths of 80-100 cm and 200-220 cm. Straw returning by mulch had the lowest nitrate nitrogen accumulation but posed the highest risk for nitrogen leaching at depths of 200-300 cm.