Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors
Nitric oxide (NO) emissions from alpine ecosystems conventionally being long-term cultivated with feed crops are not well quantified. The authors attempted to address this knowledge gap by performing a year-round experimental campaign in the northeastern Tibetan Plateau. Fertilized (F) and unfertili...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2018-07-01
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| Series: | Atmospheric and Oceanic Science Letters |
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| Online Access: | http://dx.doi.org/10.1080/16742834.2018.1487764 |
| _version_ | 1819297713915691008 |
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| author | Fei LIN Chun-Yan LIU Xiao-Xia HU Yong-Feng FU Xunhua ZHENG Wei ZHANG Rui WANG Guang-Min CAO |
| author_facet | Fei LIN Chun-Yan LIU Xiao-Xia HU Yong-Feng FU Xunhua ZHENG Wei ZHANG Rui WANG Guang-Min CAO |
| author_sort | Fei LIN |
| collection | DOAJ |
| description | Nitric oxide (NO) emissions from alpine ecosystems conventionally being long-term cultivated with feed crops are not well quantified. The authors attempted to address this knowledge gap by performing a year-round experimental campaign in the northeastern Tibetan Plateau. Fertilized (F) and unfertilized (UF) treatments were established within a flat calcareous-soil site for the long-term cultivation of feed oats. NO fluxes and five soil variables were simultaneously measured. A single plow tillage accounted for approximately 54%–73% of the NO releases during the cropping period (CP); and the non-cropping period (NCP) contributed to 51%–58% of the annual emissions. The direct NO emissions factor (EFd) was 0.021% ± 0.021%. Significantly lower Q10 values (p < 0.01) occurred in the F treatment during the CP (approximately 3.6) compared to those during the other period or in the other treatment (approximately 4.9−5.1), indicating a fertilizer-induced reduction in the temperature sensitivity. The selected soil variables jointly accounted for up to 72% (p < 0.01) of the variance for all the fluxes across both treatments. This finding suggests that temporally and/or spatially distributed fluxes from alpine calcareous-soil ecosystems for feed crop production may be easily predicted if data on these soil variables are available. Further studies are needed to test the hypothesis that the EFd is larger in alpine feed-oat fields than those in this study if the soil moisture content is higher during the period following the basal application of ammonium- or urea-based fertilizer. |
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| issn | 1674-2834 2376-6123 |
| language | English |
| last_indexed | 2024-12-24T05:18:23Z |
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| series | Atmospheric and Oceanic Science Letters |
| spelling | doaj.art-0674bff5a66f4c57ba2b73a07f8f3e8c2022-12-21T17:13:30ZengKeAi Communications Co., Ltd.Atmospheric and Oceanic Science Letters1674-28342376-61232018-07-0111433834410.1080/16742834.2018.14877641487764Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factorsFei LIN0Chun-Yan LIU1Xiao-Xia HU2Yong-Feng FU3Xunhua ZHENG4Wei ZHANG5Rui WANG6Guang-Min CAO7Institute of Atmospheric Physics, Chinese Academy of SciencesInstitute of Atmospheric Physics, Chinese Academy of SciencesInstitute of Atmospheric Physics, Chinese Academy of SciencesInstitute of Atmospheric Physics, Chinese Academy of SciencesInstitute of Atmospheric Physics, Chinese Academy of SciencesInstitute of Atmospheric Physics, Chinese Academy of SciencesInstitute of Atmospheric Physics, Chinese Academy of SciencesResearch Center for Plateau Ecology, Northwest Institute of Plateau BiologyNitric oxide (NO) emissions from alpine ecosystems conventionally being long-term cultivated with feed crops are not well quantified. The authors attempted to address this knowledge gap by performing a year-round experimental campaign in the northeastern Tibetan Plateau. Fertilized (F) and unfertilized (UF) treatments were established within a flat calcareous-soil site for the long-term cultivation of feed oats. NO fluxes and five soil variables were simultaneously measured. A single plow tillage accounted for approximately 54%–73% of the NO releases during the cropping period (CP); and the non-cropping period (NCP) contributed to 51%–58% of the annual emissions. The direct NO emissions factor (EFd) was 0.021% ± 0.021%. Significantly lower Q10 values (p < 0.01) occurred in the F treatment during the CP (approximately 3.6) compared to those during the other period or in the other treatment (approximately 4.9−5.1), indicating a fertilizer-induced reduction in the temperature sensitivity. The selected soil variables jointly accounted for up to 72% (p < 0.01) of the variance for all the fluxes across both treatments. This finding suggests that temporally and/or spatially distributed fluxes from alpine calcareous-soil ecosystems for feed crop production may be easily predicted if data on these soil variables are available. Further studies are needed to test the hypothesis that the EFd is larger in alpine feed-oat fields than those in this study if the soil moisture content is higher during the period following the basal application of ammonium- or urea-based fertilizer.http://dx.doi.org/10.1080/16742834.2018.1487764Nitric oxide (NO) emissionsdirect NO emissions factoralpine meadow cultivationnon-growing seasonfreeze–thaw periodplow tillage effecttemperature sensitivity (Q10) |
| spellingShingle | Fei LIN Chun-Yan LIU Xiao-Xia HU Yong-Feng FU Xunhua ZHENG Wei ZHANG Rui WANG Guang-Min CAO Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors Atmospheric and Oceanic Science Letters Nitric oxide (NO) emissions direct NO emissions factor alpine meadow cultivation non-growing season freeze–thaw period plow tillage effect temperature sensitivity (Q10) |
| title | Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors |
| title_full | Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors |
| title_fullStr | Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors |
| title_full_unstemmed | Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors |
| title_short | Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors |
| title_sort | non cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous soil alpine ecosystems with marginally low emission factors |
| topic | Nitric oxide (NO) emissions direct NO emissions factor alpine meadow cultivation non-growing season freeze–thaw period plow tillage effect temperature sensitivity (Q10) |
| url | http://dx.doi.org/10.1080/16742834.2018.1487764 |
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