Interaction of Straw Mulching and Nitrogen Fertilization on Ammonia Volatilization from Oilseed Rape-Maize Rotation System in Sloping Farmland in Southwestern China
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View abstract on PubMed
Summary
This summary is machine-generated.Reducing ammonia (NH3) volatilization from urea is crucial for agriculture. Straw mulching combined with urea and N-(n-butyl) thiophosphoric triamide (NBPT) effectively minimizes NH3 emissions and improves nitrogen use efficiency in purple soils.
Area Of Science
- Agricultural Science
- Environmental Science
- Soil Science
Background
- Ammonia (NH3) volatilization from urea application negatively impacts human health, environmental quality, and fertilizer value.
- Optimizing management strategies to reduce NH3 volatilization and enhance nitrogen use efficiency (NUE) is critical for sustainable agriculture.
Purpose Of The Study
- To evaluate the combined effects of mulching treatments and various fertilizer applications on NH3 volatilization, crop production, and NUE.
- To identify optimal management strategies for reducing NH3 emissions in sloping purple soil farmland.
Main Methods
- A two-year field trial was conducted using an oilseed rape-maize rotation system.
- Treatments included non-mulching (NM) and straw mulching (SM) combined with different urea formulations: urea (U), U + N-(n-butyl) thiophosphoric triamide (NBPT), U + controlled-release urea (CRU), and U + commercial organic fertilizer (OF).
Main Results
- Non-mulching with U + NBPT significantly reduced NH3 volatilization by over 64% in both growing seasons compared to non-mulching with urea alone.
- Straw mulching initially increased NH3 volatilization but, when combined with NBPT, CRU, or OF, resulted in reduced emissions compared to non-mulching with urea.
- Nitrogen use efficiency (NUE) showed no significant difference in the oilseed rape season but was higher with U + NBPT during the maize season.
Conclusions
- Combining straw mulching with urea treated with NBPT is the most effective strategy for reducing NH3 emissions in purple soil areas.
- This integrated approach offers a promising solution for mitigating environmental pollution and improving fertilizer efficiency in agriculture.
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