A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields
The combined effects of straw incorporation (SI) and polymer-coated urea (PCU) application on soil ammonia (NH3) and nitrous oxide (N2O) emissions from agricultural fields have not been comprehensively evaluated in Northwest China. We conducted a two-year field experiment to assess the effects of co...
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KeAi Communications Co., Ltd.
2024-05-01
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| Series: | Journal of Integrative Agriculture |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311923004550 |
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| author | Xiaoyun Wang Yajie Tian Qianhui Zhang Zhengxin Zhao Rui Wang Huanjie Cai |
| author_facet | Xiaoyun Wang Yajie Tian Qianhui Zhang Zhengxin Zhao Rui Wang Huanjie Cai |
| author_sort | Xiaoyun Wang |
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| description | The combined effects of straw incorporation (SI) and polymer-coated urea (PCU) application on soil ammonia (NH3) and nitrous oxide (N2O) emissions from agricultural fields have not been comprehensively evaluated in Northwest China. We conducted a two-year field experiment to assess the effects of combining SI with either uncoated urea (U) or PCU on soil NH3 emissions, N2O emissions, winter wheat yields, yield-scaled NH3 (INH3), and yield-scaled N2O (IN2O). Five treatments were investigated, no nitrogen (N) fertilizer (N0), U application at 150 kg N ha–1 with and without SI (SI+U and S0+U), and PCU application at 150 kg N ha–1 with and without SI (SI+PCU and S0+PCU). The results showed that the NH3 emissions increased by 20.98–34.35% following SI compared to straw removal, mainly due to increases in soil ammonium (NH4+-N) content and water-filled pore space (WFPS). SI resulted in higher N2O emissions than under the S0 scenario by 13.31–49.23% due to increases in soil inorganic N (SIN) contents, WFPS, and soil microbial biomass. In contrast, the PCU application reduced the SIN contents compared to the U application, reducing the NH3 and N2O emissions by 45.99–58.07 and 18.08–53.04%, respectively. Moreover, no significant positive effects of the SI or PCU applications on the winter wheat yield were observed. The lowest INH3 and IN2O values were observed under the S0+PCU and SI+PCU treatments. Our results suggest that single PCU applications and their combination with straw are the optimal agricultural strategies for mitigating gaseous N emissions and maintaining optimal winter wheat yields in Northwest China. |
| format | Article |
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| institution | Kabale University |
| issn | 2095-3119 |
| language | English |
| publishDate | 2024-05-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Journal of Integrative Agriculture |
| spelling | doaj-art-43d2d818dbd74fd0a7e9b32ae09ef00a2025-08-20T03:58:21ZengKeAi Communications Co., Ltd.Journal of Integrative Agriculture2095-31192024-05-012351718173610.1016/j.jia.2023.12.008A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fieldsXiaoyun Wang0Yajie Tian1Qianhui Zhang2Zhengxin Zhao3Rui Wang4Huanjie Cai5Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China; Correspondence Xiaoyun Wang, Mobile: +86-17791386466Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China; Correspondence Huanjie Cai, Tel: +86-29-87082133The combined effects of straw incorporation (SI) and polymer-coated urea (PCU) application on soil ammonia (NH3) and nitrous oxide (N2O) emissions from agricultural fields have not been comprehensively evaluated in Northwest China. We conducted a two-year field experiment to assess the effects of combining SI with either uncoated urea (U) or PCU on soil NH3 emissions, N2O emissions, winter wheat yields, yield-scaled NH3 (INH3), and yield-scaled N2O (IN2O). Five treatments were investigated, no nitrogen (N) fertilizer (N0), U application at 150 kg N ha–1 with and without SI (SI+U and S0+U), and PCU application at 150 kg N ha–1 with and without SI (SI+PCU and S0+PCU). The results showed that the NH3 emissions increased by 20.98–34.35% following SI compared to straw removal, mainly due to increases in soil ammonium (NH4+-N) content and water-filled pore space (WFPS). SI resulted in higher N2O emissions than under the S0 scenario by 13.31–49.23% due to increases in soil inorganic N (SIN) contents, WFPS, and soil microbial biomass. In contrast, the PCU application reduced the SIN contents compared to the U application, reducing the NH3 and N2O emissions by 45.99–58.07 and 18.08–53.04%, respectively. Moreover, no significant positive effects of the SI or PCU applications on the winter wheat yield were observed. The lowest INH3 and IN2O values were observed under the S0+PCU and SI+PCU treatments. Our results suggest that single PCU applications and their combination with straw are the optimal agricultural strategies for mitigating gaseous N emissions and maintaining optimal winter wheat yields in Northwest China.http://www.sciencedirect.com/science/article/pii/S2095311923004550straw incorporationpolymer-coated ureaNH3 and N2O emissionswinter wheat yields |
| spellingShingle | Xiaoyun Wang Yajie Tian Qianhui Zhang Zhengxin Zhao Rui Wang Huanjie Cai A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields Journal of Integrative Agriculture straw incorporation polymer-coated urea NH3 and N2O emissions winter wheat yields |
| title | A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields |
| title_full | A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields |
| title_fullStr | A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields |
| title_full_unstemmed | A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields |
| title_short | A combination of straw incorporation and polymer-coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields |
| title_sort | combination of straw incorporation and polymer coated urea offsets soil ammonia and nitrous oxide emissions in winter wheat fields |
| topic | straw incorporation polymer-coated urea NH3 and N2O emissions winter wheat yields |
| url | http://www.sciencedirect.com/science/article/pii/S2095311923004550 |
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