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Biochar with nitrapyrin reduces ammonia volatilization and increases nitrogen use efficiency of cabbage: A 15N tracer study.
- Source :
- Plant & Soil; May2024, Vol. 498 Issue 1/2, p471-485, 15p
- Publication Year :
- 2024
-
Abstract
- Aim: Nitrogen use efficiency (NUE) in subtropical cropping systems is low causing a large quantity of reactive N loss to the environment. However, the mechanisms and pathways of such losses are poorly understood. The objectives of the research were to quantify N volatilization rates and corresponding NUE in a biochar and nitrapyrin-treated cabbage field using N-control as well as a <superscript>15</superscript>N-based approach. Methods: The treatments consisted of: N-control, urea alone, urea with nitrapyrin (UN), urea with biochar (UB), and urea with biochar and nitrapyrin (UNB). In each plot, <superscript>15</superscript>N-labeled urea was applied in 1 m<superscript>2</superscript> micro-plots to repeat the treatments. Results: The UNB had higher (p < 0.001) crop yields than other treatments by 29, 23 and 16% over the urea, UN and UB treatments, respectively, while the UN and UB were also higher than the urea alone. The estimated <superscript>15</superscript>N-based NUE was higher (p < 0.01) in the UNB (40%) than in the urea alone (32%) but similar to the UN (36%) and UB (38%). The N-control based calculation overestimated NUE by 2–13% relative to the <superscript>15</superscript>N-based approach. The UNB treatment reduced NH<subscript>3</subscript> volatilization by 37, 22, and 33% over urea alone, UB and UN, respectively (p < 0.01). Post-harvest soil organic carbon (SOC) and total N were higher (p < 0.001) in the UNB and UB treatments than the other treatments. Conclusion: Our results with a subtropical crop suggest that biochar alone or co-applied with nitrapyrin improves NUE and mitigates NH<subscript>3</subscript> volatilization while increasing SOC and TN contents. [ABSTRACT FROM AUTHOR]
- Subjects :
- BIOCHAR
CROP yields
AMMONIA
CROPPING systems
CABBAGE
NITROGEN
Subjects
Details
- Language :
- English
- ISSN :
- 0032079X
- Volume :
- 498
- Issue :
- 1/2
- Database :
- Complementary Index
- Journal :
- Plant & Soil
- Publication Type :
- Academic Journal
- Accession number :
- 177817195
- Full Text :
- https://doi.org/10.1007/s11104-023-06448-y