Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert
Few studies have investigated how the reclamation of the desert to cropland affects soil nitrous oxide (N<sub>2</sub>O) emissions. A study site was initiated in 2005 at the southern Taklimakan Desert by establishing four fields along the desert−oasis ecotone. Three fields were reclaimed...
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MDPI AG
2022-11-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/11/1897 |
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| author | Yufeng Wu Xiaopeng Gao Wennong Kuang Xiangyi Li Fanjiang Zeng |
| author_facet | Yufeng Wu Xiaopeng Gao Wennong Kuang Xiangyi Li Fanjiang Zeng |
| author_sort | Yufeng Wu |
| collection | DOAJ |
| description | Few studies have investigated how the reclamation of the desert to cropland affects soil nitrous oxide (N<sub>2</sub>O) emissions. A study site was initiated in 2005 at the southern Taklimakan Desert by establishing four fields along the desert−oasis ecotone. Three fields were reclaimed as croplands for continuous cotton (<i>Gossypium hirsutum</i> L.) production and received (1) high, (2) low, and (3) no fertilizer inputs and the fourth field remained as a native desert. Static-chamber monitoring of N<sub>2</sub>O flux was conducted from April 2019 to March 2021. N<sub>2</sub>O emissions occurred in cropland mainly after drip fertigation during the growing season. The two−year N<sub>2</sub>O emissions in the desert, no fertilizer, low fertilizer, and high fertilizer were 248, 670, 2232, and 3615 g N ha<sup>−1</sup>, respectively. The native desert was a weak source of N<sub>2</sub>O emissions, with the non−growing season emissions accounting for 66% of the annual emissions. N<sub>2</sub>O emissions from farmland mainly occurred over the growing season, accounting for 73−98% of the total annual emissions. The N<sub>2</sub>O flux was positively related to soil NO<sub>3</sub><sup>−</sup>−N concentration and soil water−filled pore space (WFPS), highlighting the importance of soil N availability and moisture in affecting N<sub>2</sub>O emissions in extremely arid areas. Our results demonstrate that land reclamation from the desert to cropland significantly increased N<sub>2</sub>O emissions due to high nutrient inputs. Thus, appropriate fertilizer management in the reclaimed land is essential for maintaining yield, improving soil quality, and reducing N<sub>2</sub>O emissions for continuous cotton production. |
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| language | English |
| last_indexed | 2024-03-09T18:28:37Z |
| publishDate | 2022-11-01 |
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| series | Atmosphere |
| spelling | doaj.art-ae97eaa8bbca466bbdd7902122be06ae2023-11-24T07:42:36ZengMDPI AGAtmosphere2073-44332022-11-011311189710.3390/atmos13111897Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from DesertYufeng Wu0Xiaopeng Gao1Wennong Kuang2Xiangyi Li3Fanjiang Zeng4State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaDepartment of Soil Science, University of Manitoba, Winnipeg, MB R3T2N2, CanadaResearch Center of Forest Management Engineering of State Forestry and Grassland Administration, Beijing Forestry University, Beijing 100083, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaState Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, ChinaFew studies have investigated how the reclamation of the desert to cropland affects soil nitrous oxide (N<sub>2</sub>O) emissions. A study site was initiated in 2005 at the southern Taklimakan Desert by establishing four fields along the desert−oasis ecotone. Three fields were reclaimed as croplands for continuous cotton (<i>Gossypium hirsutum</i> L.) production and received (1) high, (2) low, and (3) no fertilizer inputs and the fourth field remained as a native desert. Static-chamber monitoring of N<sub>2</sub>O flux was conducted from April 2019 to March 2021. N<sub>2</sub>O emissions occurred in cropland mainly after drip fertigation during the growing season. The two−year N<sub>2</sub>O emissions in the desert, no fertilizer, low fertilizer, and high fertilizer were 248, 670, 2232, and 3615 g N ha<sup>−1</sup>, respectively. The native desert was a weak source of N<sub>2</sub>O emissions, with the non−growing season emissions accounting for 66% of the annual emissions. N<sub>2</sub>O emissions from farmland mainly occurred over the growing season, accounting for 73−98% of the total annual emissions. The N<sub>2</sub>O flux was positively related to soil NO<sub>3</sub><sup>−</sup>−N concentration and soil water−filled pore space (WFPS), highlighting the importance of soil N availability and moisture in affecting N<sub>2</sub>O emissions in extremely arid areas. Our results demonstrate that land reclamation from the desert to cropland significantly increased N<sub>2</sub>O emissions due to high nutrient inputs. Thus, appropriate fertilizer management in the reclaimed land is essential for maintaining yield, improving soil quality, and reducing N<sub>2</sub>O emissions for continuous cotton production.https://www.mdpi.com/2073-4433/13/11/1897desertextremely arid landland use changenitrous oxidenon−growing seasonreclamation |
| spellingShingle | Yufeng Wu Xiaopeng Gao Wennong Kuang Xiangyi Li Fanjiang Zeng Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert Atmosphere desert extremely arid land land use change nitrous oxide non−growing season reclamation |
| title | Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert |
| title_full | Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert |
| title_fullStr | Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert |
| title_full_unstemmed | Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert |
| title_short | Long−Term Fertilization Increased Nitrous Oxide Emissions from Croplands Reclaimed from Desert |
| title_sort | long term fertilization increased nitrous oxide emissions from croplands reclaimed from desert |
| topic | desert extremely arid land land use change nitrous oxide non−growing season reclamation |
| url | https://www.mdpi.com/2073-4433/13/11/1897 |
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