Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies
Agricultural strategies are urgently needed to mitigate greenhouse gas emissions without reducing crop yield. Seedling rate per hill will affect the quantity and quality of tillers, which may affect rice yield and CH<sub>4</sub> emissions. Therefore, it is hypothesized that high yields w...
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MDPI AG
2024-11-01
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| Online Access: | https://www.mdpi.com/2073-4433/15/11/1342 |
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| author | Qiping Chen Hao Li Hexian Huang Wei Wang |
| author_facet | Qiping Chen Hao Li Hexian Huang Wei Wang |
| author_sort | Qiping Chen |
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| description | Agricultural strategies are urgently needed to mitigate greenhouse gas emissions without reducing crop yield. Seedling rate per hill will affect the quantity and quality of tillers, which may affect rice yield and CH<sub>4</sub> emissions. Therefore, it is hypothesized that high yields with low yield-scaled CH<sub>4</sub> emissions could be achieved with optimal seedling rate per hill. A field experiment was conducted with three densities (low seedling rate, LSR; moderate seedling rate, MSR; and high seedling rate, HSR) for two consecutive rice seasons. The CH<sub>4</sub> fluxes were determined by the static chamber–GC method. The results showed no significant differences in rice yields, seasonal CH<sub>4</sub> emissions, or yield-scaled CH<sub>4</sub> emissions between the three treatments. For early rice, the HSR tended to achieve high yield without increasing yield-scaled CH<sub>4</sub> emissions. As for late rice, the MSR showed similar rice yield, and tended to have lower yield-scaled CH<sub>4</sub> emissions in comparison with the HSR. The results suggest that choosing an appropriate seedling rate per hill to increase grain yield while maintaining lower or comparable yield-scaled CH<sub>4</sub> emissions can be a promising option to reduce CH<sub>4</sub> emissions from rice paddies. |
| format | Article |
| id | doaj-art-a6ecb903ce3342c3a9978f53c25e885f |
| institution | Kabale University |
| issn | 2073-4433 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Atmosphere |
| spelling | doaj-art-a6ecb903ce3342c3a9978f53c25e885f2024-11-26T17:50:27ZengMDPI AGAtmosphere2073-44332024-11-011511134210.3390/atmos15111342Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice PaddiesQiping Chen0Hao Li1Hexian Huang2Wei Wang3Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, ChinaEcology and Environment Monitoring Centre of Hunan, Changsha 410014, ChinaEcology and Environment Monitoring Centre of Hunan, Changsha 410014, ChinaKey Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, ChinaAgricultural strategies are urgently needed to mitigate greenhouse gas emissions without reducing crop yield. Seedling rate per hill will affect the quantity and quality of tillers, which may affect rice yield and CH<sub>4</sub> emissions. Therefore, it is hypothesized that high yields with low yield-scaled CH<sub>4</sub> emissions could be achieved with optimal seedling rate per hill. A field experiment was conducted with three densities (low seedling rate, LSR; moderate seedling rate, MSR; and high seedling rate, HSR) for two consecutive rice seasons. The CH<sub>4</sub> fluxes were determined by the static chamber–GC method. The results showed no significant differences in rice yields, seasonal CH<sub>4</sub> emissions, or yield-scaled CH<sub>4</sub> emissions between the three treatments. For early rice, the HSR tended to achieve high yield without increasing yield-scaled CH<sub>4</sub> emissions. As for late rice, the MSR showed similar rice yield, and tended to have lower yield-scaled CH<sub>4</sub> emissions in comparison with the HSR. The results suggest that choosing an appropriate seedling rate per hill to increase grain yield while maintaining lower or comparable yield-scaled CH<sub>4</sub> emissions can be a promising option to reduce CH<sub>4</sub> emissions from rice paddies.https://www.mdpi.com/2073-4433/15/11/1342seedling rateplanting densityyield-scaled global warming potentialgreenhouse gas |
| spellingShingle | Qiping Chen Hao Li Hexian Huang Wei Wang Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies Atmosphere seedling rate planting density yield-scaled global warming potential greenhouse gas |
| title | Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies |
| title_full | Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies |
| title_fullStr | Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies |
| title_full_unstemmed | Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies |
| title_short | Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies |
| title_sort | effect of seedling rates on crop yield and methane emissions from rice paddies |
| topic | seedling rate planting density yield-scaled global warming potential greenhouse gas |
| url | https://www.mdpi.com/2073-4433/15/11/1342 |
| work_keys_str_mv | AT qipingchen effectofseedlingratesoncropyieldandmethaneemissionsfromricepaddies AT haoli effectofseedlingratesoncropyieldandmethaneemissionsfromricepaddies AT hexianhuang effectofseedlingratesoncropyieldandmethaneemissionsfromricepaddies AT weiwang effectofseedlingratesoncropyieldandmethaneemissionsfromricepaddies |