Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China
Soil respiration is a major source of atmospheric carbon dioxide (CO2). Intensive exploring on soil respiration in farmland may provide important information for controlling CO2 emissions. However, some important meteorological factors, especially for the wind, have been neglected previously. In thi...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X22012973 |
| _version_ | 1797942066676760576 |
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| author | Yongqing Luo Fengxia Zhang Jieping Ding Haojiang Bai Yuqiang Li |
| author_facet | Yongqing Luo Fengxia Zhang Jieping Ding Haojiang Bai Yuqiang Li |
| author_sort | Yongqing Luo |
| collection | DOAJ |
| description | Soil respiration is a major source of atmospheric carbon dioxide (CO2). Intensive exploring on soil respiration in farmland may provide important information for controlling CO2 emissions. However, some important meteorological factors, especially for the wind, have been neglected previously. In this two-season field observation, we measured soil total respiration (Rt) in maize farmland in an agro-pastoral transitional zone in northeastern China, including autotrophic (root) respiration (Ra) and heterotrophic respiration (Rh), using the root-exclusion method. The mean Rt was 4.0 ± 0.8 and 6.1 ± 1.4 μmol·m−2·s−1 in the two growing seasons. The root contribution to the total soil respiration rate (Rc) was 55.5 and 44.1 %, respectively, and both followed an approximately unimodal curve as a function of day of year. Ra and Rh were both positively correlated with the soil temperature. Ra decreased with increasing wind speed, but Rh was not significantly affected; thus, Rc was negatively correlated with the wind speed. The decrease of Rc caused by increased wind speed differed among the growth stages. Significant suppression of Rc was detected at the jointing stage and at maturity. Responses of Rt and its components to meteorological factors differed significantly in magnitude between the day and night. However, Rc decreased with increasing wind speed both during the day and at night. In summary, the decrease of farmland soil respiration by the wind resulted from decreased root respiration and could be regulated by the modifying of artificial windbreaks or by the expanding of row space of the maize planting, thereby reducing carbon dioxide emission. Indeed, this study is only the observation and analysis of some traditional factors, more intensive observations, especially evidence from physiological traits, morphological anatomy and other perspectives are required to confirm this relationship in further studies. |
| first_indexed | 2024-04-10T20:02:51Z |
| format | Article |
| id | doaj.art-b47bad8ea8284bc486685d2f809c0740 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-04-10T20:02:51Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-b47bad8ea8284bc486685d2f809c07402023-01-27T04:19:20ZengElsevierEcological Indicators1470-160X2023-02-01146109824Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern ChinaYongqing Luo0Fengxia Zhang1Jieping Ding2Haojiang Bai3Yuqiang Li4Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding authors at: Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China (Y. Luo) and Institute of Water Environment Research, Gansu Academy of Eco-Environmental Sciences, Lanzhou 730000, China (J. Ding).School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaInstitute of Water Environment Research, Gansu Academy of Eco-Environmental Sciences, Lanzhou 730000, China; Corresponding authors at: Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China (Y. Luo) and Institute of Water Environment Research, Gansu Academy of Eco-Environmental Sciences, Lanzhou 730000, China (J. Ding).Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaNaiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaSoil respiration is a major source of atmospheric carbon dioxide (CO2). Intensive exploring on soil respiration in farmland may provide important information for controlling CO2 emissions. However, some important meteorological factors, especially for the wind, have been neglected previously. In this two-season field observation, we measured soil total respiration (Rt) in maize farmland in an agro-pastoral transitional zone in northeastern China, including autotrophic (root) respiration (Ra) and heterotrophic respiration (Rh), using the root-exclusion method. The mean Rt was 4.0 ± 0.8 and 6.1 ± 1.4 μmol·m−2·s−1 in the two growing seasons. The root contribution to the total soil respiration rate (Rc) was 55.5 and 44.1 %, respectively, and both followed an approximately unimodal curve as a function of day of year. Ra and Rh were both positively correlated with the soil temperature. Ra decreased with increasing wind speed, but Rh was not significantly affected; thus, Rc was negatively correlated with the wind speed. The decrease of Rc caused by increased wind speed differed among the growth stages. Significant suppression of Rc was detected at the jointing stage and at maturity. Responses of Rt and its components to meteorological factors differed significantly in magnitude between the day and night. However, Rc decreased with increasing wind speed both during the day and at night. In summary, the decrease of farmland soil respiration by the wind resulted from decreased root respiration and could be regulated by the modifying of artificial windbreaks or by the expanding of row space of the maize planting, thereby reducing carbon dioxide emission. Indeed, this study is only the observation and analysis of some traditional factors, more intensive observations, especially evidence from physiological traits, morphological anatomy and other perspectives are required to confirm this relationship in further studies.http://www.sciencedirect.com/science/article/pii/S1470160X22012973Farmland ecosystemHeterotrophic respirationHorqin sandy landRoot respirationTotal soil respirationWind speed |
| spellingShingle | Yongqing Luo Fengxia Zhang Jieping Ding Haojiang Bai Yuqiang Li Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China Ecological Indicators Farmland ecosystem Heterotrophic respiration Horqin sandy land Root respiration Total soil respiration Wind speed |
| title | Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China |
| title_full | Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China |
| title_fullStr | Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China |
| title_full_unstemmed | Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China |
| title_short | Soil respiration may be reduced by wind via the suppressing of root respiration: Field observation in maize farmland in the agro-pastoral transitional zone, northeastern China |
| title_sort | soil respiration may be reduced by wind via the suppressing of root respiration field observation in maize farmland in the agro pastoral transitional zone northeastern china |
| topic | Farmland ecosystem Heterotrophic respiration Horqin sandy land Root respiration Total soil respiration Wind speed |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X22012973 |
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