التفاصيل البيبلوغرافية
| العنوان: |
Straw retention and inhibitor application reduce the leaching risk of mineral N in no-tillage systems of Northeast China. |
| المؤلفون: |
Yuan, Lei, Hu, Yanyu, Yang, Miaoyin, Lei, Ningbo, Chen, Huaihai, Ma, Jian, Chen, Xin, Xie, Hongtu, He, Hongbo, Zhang, Xudong, Lu, Caiyan |
| المصدر: |
Plant & Soil; Jul2024, Vol. 500 Issue 1/2, p431-443, 13p |
| مصطلحات موضوعية: |
STRAW, LEACHING, NITRIFICATION inhibitors, CROP yields, SOIL profiles, MOLLISOLS, NO-tillage |
| مستخلص: |
Purpose: To clarify the effects of maize straw retention combined with reduced fertilization and urease/nitrification inhibitors on the accumulation and leaching potential of mineral N in the deep soil profile of no-tillage agroecosystem. Methods: A 15N-tracing micro-plot experiment was conducted with four treatments (NPK, traditional NPK fertilization; NPKS, NPK with maize straw retention; RNPKS, NPKS with 20% fertilizer-N reduction; and RNPKSI, RNPKS with inhibitors application) in the Mollisol of Northeast China. We analyzed fertilizer-N transformation dynamics in different soil N pools, quantified the fertilizer N use efficiency in crops, and evaluated fertilizer-derived nitrate leaching losses throughout the complete maize growing period. Results: Our analyses revealed that, compared to the NPK treatment, NPKS, RNPKS, and RNPKSI remarkably reduced the accumulation of urea-derived mineral-N during maize seedling stage by enhancing the transformation of urea-N into fixed NH4+-N and organic-N pools, both of which could be quickly released for maize uptake following the extension of crop growth periods. At the maize ripening stage, soil NO3−-N and 15N-labeled urea-derived NO3−-N, which migrated vertically to a depth of 80–100 cm, were significantly reduced by treatments of RNPKS and RNPKSI without minimizing crop yields when compared with NPK. Conclusion: Our results suggest that combining maize straw retention with reduced fertilization and the application of urease/nitrification inhibitors can be efficient management practices for lowering urea N leaching risk, improving N use efficiency, and maintaining or even increasing crop yields by enhancing soil N retention and supply in the croplands of Northeast China. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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