Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China
Carbon dioxide (CO<sub>2</sub>) is recognized as key part of evaluating the soil environment, and the soil respiration rate is an effective indicator of CO<sub>2</sub> emission. To explore the influence and coupling mechanism of irrigation on the soil respiration of millet fa...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/10/1584 |
| _version_ | 1797475434688937984 |
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| author | Xiaoli Gao Nan Zhao Yuhui Lu Xuan Han Zhiping Yang |
| author_facet | Xiaoli Gao Nan Zhao Yuhui Lu Xuan Han Zhiping Yang |
| author_sort | Xiaoli Gao |
| collection | DOAJ |
| description | Carbon dioxide (CO<sub>2</sub>) is recognized as key part of evaluating the soil environment, and the soil respiration rate is an effective indicator of CO<sub>2</sub> emission. To explore the influence and coupling mechanism of irrigation on the soil respiration of millet farmland in the Northern Shanxi Province in China, conventional rainfed (CK) and supplementary irrigation (W1) at the late jointing stage were conducted. The soil respiration rate and carbon emission flux in millet farmland under different treatments were observed. The relationship between soil respiration rate and soil physical–chemical properties and the crop growth index was further analyzed. The result showed that the soil respiration rate and carbon emission flux of W1 were higher than those of CK treatment. The comparison of the linear regression correlation between soil respiration rate and soil physical–chemical properties revealed that the major regulating factors of the soil respiration rate were soil moisture (<10.6%) followed by soil pH, soil moisture (>10.6%), soil temperature, and finally soil organic matter content. There are uncertainties regarding the soil moisture content variation range in soil respiration. Moreover, supplementary irrigation promoted the growth indexes, yield, and irrigation water use efficiency in millet farmland. Further research with less irrigation treatment is necessary for exploring an optimization model of water use efficiency and low carbon dioxide emissions in millet fields, which would be helpful to realize agricultural water utilization and a “carbon peak” in the sense of farmland. |
| first_indexed | 2024-03-09T20:44:04Z |
| format | Article |
| id | doaj.art-b5b25b097a4f434db2678b05a47d4f87 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T20:44:04Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-b5b25b097a4f434db2678b05a47d4f872023-11-23T22:50:30ZengMDPI AGAtmosphere2073-44332022-09-011310158410.3390/atmos13101584Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in ChinaXiaoli Gao0Nan Zhao1Yuhui Lu2Xuan Han3Zhiping Yang4College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaInstitute of Soil and Water Conservation Science, Shanxi Agricultural University, Taiyuan 030013, ChinaCollege of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaShanxi Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, ChinaCarbon dioxide (CO<sub>2</sub>) is recognized as key part of evaluating the soil environment, and the soil respiration rate is an effective indicator of CO<sub>2</sub> emission. To explore the influence and coupling mechanism of irrigation on the soil respiration of millet farmland in the Northern Shanxi Province in China, conventional rainfed (CK) and supplementary irrigation (W1) at the late jointing stage were conducted. The soil respiration rate and carbon emission flux in millet farmland under different treatments were observed. The relationship between soil respiration rate and soil physical–chemical properties and the crop growth index was further analyzed. The result showed that the soil respiration rate and carbon emission flux of W1 were higher than those of CK treatment. The comparison of the linear regression correlation between soil respiration rate and soil physical–chemical properties revealed that the major regulating factors of the soil respiration rate were soil moisture (<10.6%) followed by soil pH, soil moisture (>10.6%), soil temperature, and finally soil organic matter content. There are uncertainties regarding the soil moisture content variation range in soil respiration. Moreover, supplementary irrigation promoted the growth indexes, yield, and irrigation water use efficiency in millet farmland. Further research with less irrigation treatment is necessary for exploring an optimization model of water use efficiency and low carbon dioxide emissions in millet fields, which would be helpful to realize agricultural water utilization and a “carbon peak” in the sense of farmland.https://www.mdpi.com/2073-4433/13/10/1584carbon emissionsoil physical–chemical propertiesgrowth indexirrigationrainfed |
| spellingShingle | Xiaoli Gao Nan Zhao Yuhui Lu Xuan Han Zhiping Yang Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China Atmosphere carbon emission soil physical–chemical properties growth index irrigation rainfed |
| title | Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China |
| title_full | Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China |
| title_fullStr | Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China |
| title_full_unstemmed | Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China |
| title_short | Effects of Supplementary Irrigation on Soil Respiration of Millet Farmland in a Semi-Arid Region in China |
| title_sort | effects of supplementary irrigation on soil respiration of millet farmland in a semi arid region in china |
| topic | carbon emission soil physical–chemical properties growth index irrigation rainfed |
| url | https://www.mdpi.com/2073-4433/13/10/1584 |
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