Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants
Two rice cultivars (Xiushui 09 and Chunyou 84) were used to evaluate the effects of various soil oxygen (O2) conditions on soil nitrogen (N) transformation, absorption and accumulation in rice plants. The treatments were continuous flooding (CF), continuous flooding and aeration (CFA), and alternate...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-03-01
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| Series: | Rice Science |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1672630820300093 |
| _version_ | 1811286677350514688 |
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| author | Xu Chunmei Chen Liping Chen Song Chu Guang Wang Danying Zhang Xiufu |
| author_facet | Xu Chunmei Chen Liping Chen Song Chu Guang Wang Danying Zhang Xiufu |
| author_sort | Xu Chunmei |
| collection | DOAJ |
| description | Two rice cultivars (Xiushui 09 and Chunyou 84) were used to evaluate the effects of various soil oxygen (O2) conditions on soil nitrogen (N) transformation, absorption and accumulation in rice plants. The treatments were continuous flooding (CF), continuous flooding and aeration (CFA), and alternate wetting and drying (AWD). The results showed that the AWD and CFA treatments improved soil N transformation, rice growth, and N absorption and accumulation. Soil NO3– content, nitrification activity and ammonia-oxidising bacteria abundance, leaf area, nitrate reductase activity, and N absorption and accumulation in rice all increased in both cultivars. However, soil microbial biomass carbon and pH did not significantly change during the whole period of rice growth. Correlation analysis revealed a significant positive correlation between the nitrification activity and ammonia-oxidising bacteria abundance, and both of them significantly increased as the total N accumulation in rice increased. Our results indicated that improved soil O2 conditions led to changing soil N cycling and contributed to increases in N absorption and accumulation by rice in paddy fields. Keywords: ammonium-nitrogen content, nitrate-nitrogen content, nitrification activity, nitrate reductase activity, rhizosphere oxygen condition, ammonia-oxidising bacteria abundance, rice, nitrogen use efficiency |
| first_indexed | 2024-04-13T03:05:11Z |
| format | Article |
| id | doaj.art-70be731a251c46acb9d88dde84fef0fb |
| institution | Directory Open Access Journal |
| issn | 1672-6308 |
| language | English |
| last_indexed | 2024-04-13T03:05:11Z |
| publishDate | 2020-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Rice Science |
| spelling | doaj.art-70be731a251c46acb9d88dde84fef0fb2022-12-22T03:05:17ZengElsevierRice Science1672-63082020-03-01272162174Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice PlantsXu Chunmei0Chen Liping1Chen Song2Chu Guang3Wang Danying4Zhang Xiufu5China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, ChinaChina National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, ChinaCorresponding author.; China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, ChinaCorresponding author.; China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310006, ChinaTwo rice cultivars (Xiushui 09 and Chunyou 84) were used to evaluate the effects of various soil oxygen (O2) conditions on soil nitrogen (N) transformation, absorption and accumulation in rice plants. The treatments were continuous flooding (CF), continuous flooding and aeration (CFA), and alternate wetting and drying (AWD). The results showed that the AWD and CFA treatments improved soil N transformation, rice growth, and N absorption and accumulation. Soil NO3– content, nitrification activity and ammonia-oxidising bacteria abundance, leaf area, nitrate reductase activity, and N absorption and accumulation in rice all increased in both cultivars. However, soil microbial biomass carbon and pH did not significantly change during the whole period of rice growth. Correlation analysis revealed a significant positive correlation between the nitrification activity and ammonia-oxidising bacteria abundance, and both of them significantly increased as the total N accumulation in rice increased. Our results indicated that improved soil O2 conditions led to changing soil N cycling and contributed to increases in N absorption and accumulation by rice in paddy fields. Keywords: ammonium-nitrogen content, nitrate-nitrogen content, nitrification activity, nitrate reductase activity, rhizosphere oxygen condition, ammonia-oxidising bacteria abundance, rice, nitrogen use efficiencyhttp://www.sciencedirect.com/science/article/pii/S1672630820300093 |
| spellingShingle | Xu Chunmei Chen Liping Chen Song Chu Guang Wang Danying Zhang Xiufu Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants Rice Science |
| title | Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants |
| title_full | Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants |
| title_fullStr | Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants |
| title_full_unstemmed | Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants |
| title_short | Rhizosphere Aeration Improves Nitrogen Transformation in Soil, and Nitrogen Absorption and Accumulation in Rice Plants |
| title_sort | rhizosphere aeration improves nitrogen transformation in soil and nitrogen absorption and accumulation in rice plants |
| url | http://www.sciencedirect.com/science/article/pii/S1672630820300093 |
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