Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice
Nitrogen (N) use efficiency worldwide varies greatly due to climate, agronomic, and soil factors. However, the information on individual effects of these factors on N use efficiency is crucial but has remained scanty. Given that climate cannot be regulated, understanding the relative importance of f...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/ac6a6b |
| _version_ | 1797747046281641984 |
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| author | Siyuan Cai Xu Zhao Xiaoyuan Yan |
| author_facet | Siyuan Cai Xu Zhao Xiaoyuan Yan |
| author_sort | Siyuan Cai |
| collection | DOAJ |
| description | Nitrogen (N) use efficiency worldwide varies greatly due to climate, agronomic, and soil factors. However, the information on individual effects of these factors on N use efficiency is crucial but has remained scanty. Given that climate cannot be regulated, understanding the relative importance of fertilizer and soil variations on regional differences in N use efficiency is critical. Here, we constructed a database of 302 studies from 1986 to 2020 in East and Northeast China to determine the effects of climate, soil properties, and fertilizer N (FN) rate on variations in N use efficiency (agronomic efficiency (AE), apparent recovery efficiency (RE), physiological efficiency (PE), N harvest index, partial factor productivity), N surplus, grain N content, and reactive N (Nr) losses (N _2 O emissions, NH _3 volatilization, Nr leaching, and runoff). Rice yield was comparable between two regions under farmers’ N practices, yet the N input was considerably higher in East China. All indices of N use efficiency, except RE, are higher in Northeast China. Differences in AE were dominated by the ability of the plant to mobilize N (PE) rather than N uptake (RE), FN, or Nr loss. Soil properties and FN related to optimizable N management accounted for 29% (RE), 39% (PE), and 43% (Nr losses) of the variations, of which key factors as pH showed a negative effect while available N (AN) correlated positively to the N use efficiency. To realize high N use efficiency, pivotal effects of pH, AN, and FN on N use efficiency under certain climate zone should be considered. |
| first_indexed | 2024-03-12T15:45:32Z |
| format | Article |
| id | doaj.art-eb5a1b60914540919069be3f833c7f1e |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:45:32Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-eb5a1b60914540919069be3f833c7f1e2023-08-09T15:28:59ZengIOP PublishingEnvironmental Research Letters1748-93262022-01-0117505403910.1088/1748-9326/ac6a6bEffects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in riceSiyuan Cai0https://orcid.org/0000-0002-6612-4095Xu Zhao1https://orcid.org/0000-0002-4956-8495Xiaoyuan Yan2State Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008, People’s Republic of China; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaState Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008, People’s Republic of China; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaState Key Laboratory of Soil and Sustainable Agriculture, Changshu National Agro-Ecosystem Observation and Research Station, Institute of Soil Science, Chinese Academy of Sciences , Nanjing 210008, People’s Republic of China; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaNitrogen (N) use efficiency worldwide varies greatly due to climate, agronomic, and soil factors. However, the information on individual effects of these factors on N use efficiency is crucial but has remained scanty. Given that climate cannot be regulated, understanding the relative importance of fertilizer and soil variations on regional differences in N use efficiency is critical. Here, we constructed a database of 302 studies from 1986 to 2020 in East and Northeast China to determine the effects of climate, soil properties, and fertilizer N (FN) rate on variations in N use efficiency (agronomic efficiency (AE), apparent recovery efficiency (RE), physiological efficiency (PE), N harvest index, partial factor productivity), N surplus, grain N content, and reactive N (Nr) losses (N _2 O emissions, NH _3 volatilization, Nr leaching, and runoff). Rice yield was comparable between two regions under farmers’ N practices, yet the N input was considerably higher in East China. All indices of N use efficiency, except RE, are higher in Northeast China. Differences in AE were dominated by the ability of the plant to mobilize N (PE) rather than N uptake (RE), FN, or Nr loss. Soil properties and FN related to optimizable N management accounted for 29% (RE), 39% (PE), and 43% (Nr losses) of the variations, of which key factors as pH showed a negative effect while available N (AN) correlated positively to the N use efficiency. To realize high N use efficiency, pivotal effects of pH, AN, and FN on N use efficiency under certain climate zone should be considered.https://doi.org/10.1088/1748-9326/ac6a6bN use efficiencyfertilizersoil propertyclimaterice cultivationN supply |
| spellingShingle | Siyuan Cai Xu Zhao Xiaoyuan Yan Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice Environmental Research Letters N use efficiency fertilizer soil property climate rice cultivation N supply |
| title | Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice |
| title_full | Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice |
| title_fullStr | Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice |
| title_full_unstemmed | Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice |
| title_short | Effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice |
| title_sort | effects of climate and soil properties on regional differences in nitrogen use efficiency and reactive nitrogen losses in rice |
| topic | N use efficiency fertilizer soil property climate rice cultivation N supply |
| url | https://doi.org/10.1088/1748-9326/ac6a6b |
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