Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover
Plastic film mulching and nitrogen (N) fertilization are two important field management practices used to increase crop yields in rain-fed agriculture in arid and semi-arid areas. These two practices, however, can have opposing effects on soil organic carbon (SOC) stock and turnover. To clarify and...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Geoderma |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0016706123003919 |
| _version_ | 1797398732513214464 |
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| author | Kaiping Zhang Zhixin Li Yufei Li Pingxing Wan Ning Chai Ming Li Huihui Wei Yakov Kuzyakov Ekaterina Filimonenko Sulaiman Almwarai Alharbi Feng-Min Li Wenjuan Zhang Feng Zhang |
| author_facet | Kaiping Zhang Zhixin Li Yufei Li Pingxing Wan Ning Chai Ming Li Huihui Wei Yakov Kuzyakov Ekaterina Filimonenko Sulaiman Almwarai Alharbi Feng-Min Li Wenjuan Zhang Feng Zhang |
| author_sort | Kaiping Zhang |
| collection | DOAJ |
| description | Plastic film mulching and nitrogen (N) fertilization are two important field management practices used to increase crop yields in rain-fed agriculture in arid and semi-arid areas. These two practices, however, can have opposing effects on soil organic carbon (SOC) stock and turnover. To clarify and analyze the combined effects of these practices, we conducted a 7-year continuous maize cultivation experiment with four treatments: (1) no plastic film mulching without N fertilization (Control), (2) plastic film mulching without N fertilization (PFM), (3) N fertilization without plastic film mulching (N), and (4) plastic film mulching with N fertilization (PFM + N). The 13C natural abundance of in the light and heavy fractions of organic carbon (LFOC and HFOC) was used to differentiate “old” (>7 years) and “new” (<7 years) C in the soil after C3 to C4 vegetation change. PFM increased soil temperature and moisture content over 7 years and led to a 150 % and 108 % increase in the above-ground and root biomass of maize, respectively. Hot and wet conditions under PFM accelerated the decomposition of both labile C (i.e., LFOC) and persistent C (i.e., HFOC), as measured by CO2 efflux from the soil. PFM decreased the LFOC and HFOC pools due to the fast decomposition of “old” C and inadequate stabilization of “new” C. Furthermore, PFM accelerated HFOC decomposition to a greater extent than that of LFOC. The Q10 values of SOC decomposition remained similar both in the presence and absence of PFM. Nitrogen fertilization increased the aboveground and root biomass of maize by 54 % and 40 %, respectively. In the control soil, microorganisms decomposed organic N owing to limited availability of mineral N and in the absence of any from replenishment by fertilizer N. Thus, the increase in LFOC content under N fertilization, was primarily attributed to the reduced decomposition of “old” C. The use of N fertilization produced a similar HFOC content as that of the control soil, while also accelerating the decomposition of “old” C and promoting the stabilization of “new” C, resulting in a faster turnover rate. Consequently, the impact of N fertilization on SOC turnover was negligible owing to the contrasting effects on LFOC and HFOC. The application of N fertilization resulted in a reduction of the Q10 value as compared to control. The combination of PFM and N fertilization accelerated the decomposition of HFOC and SOC, while having absent effect on SOC, labile C and persistent C contents. This indicates that 7 years weren’t long enough to trigger a response to the combination of PFM and N fertilization from SOC and HFOC contents. In summary, PFM led to a decline in the SOC content by accelerating the decomposition of both LFOC and HFOC. Conversely, N fertilization maintained SOC content by inhibiting LFOC decomposition and enhancing HFOC decomposition. |
| first_indexed | 2024-03-09T01:29:45Z |
| format | Article |
| id | doaj.art-d2d365cbd82b4c0b82b1bf117b528ebd |
| institution | Directory Open Access Journal |
| issn | 1872-6259 |
| language | English |
| last_indexed | 2024-03-09T01:29:45Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
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| series | Geoderma |
| spelling | doaj.art-d2d365cbd82b4c0b82b1bf117b528ebd2023-12-10T06:13:39ZengElsevierGeoderma1872-62592023-12-01440116714Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnoverKaiping Zhang0Zhixin Li1Yufei Li2Pingxing Wan3Ning Chai4Ming Li5Huihui Wei6Yakov Kuzyakov7Ekaterina Filimonenko8Sulaiman Almwarai Alharbi9Feng-Min Li10Wenjuan Zhang11Feng Zhang12State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, ChinaDepartment of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Goettingen, 37077 Göttingen, Germany; Agro-Technological Institute, RUDN University, 117198 Moscow, Russia; Institute of Environmental Sciences, Kazan Federal University, 420049 Kazan, RussiaInstitute of Environmental and Agricultural Biology (X-BIO), Tyumen State University, Tyumen, RussiaDepartment of Botany & Microbiology, College of Science, King Saud University, P.O Box 2455, Riyadh 11451, Kingdom of Saudi ArabiaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China; College of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, ChinaInstitute of Qinghai Provincial Geographical Monitoring, Xining, Qinghai 810000, ChinaState Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China; Corresponding author.Plastic film mulching and nitrogen (N) fertilization are two important field management practices used to increase crop yields in rain-fed agriculture in arid and semi-arid areas. These two practices, however, can have opposing effects on soil organic carbon (SOC) stock and turnover. To clarify and analyze the combined effects of these practices, we conducted a 7-year continuous maize cultivation experiment with four treatments: (1) no plastic film mulching without N fertilization (Control), (2) plastic film mulching without N fertilization (PFM), (3) N fertilization without plastic film mulching (N), and (4) plastic film mulching with N fertilization (PFM + N). The 13C natural abundance of in the light and heavy fractions of organic carbon (LFOC and HFOC) was used to differentiate “old” (>7 years) and “new” (<7 years) C in the soil after C3 to C4 vegetation change. PFM increased soil temperature and moisture content over 7 years and led to a 150 % and 108 % increase in the above-ground and root biomass of maize, respectively. Hot and wet conditions under PFM accelerated the decomposition of both labile C (i.e., LFOC) and persistent C (i.e., HFOC), as measured by CO2 efflux from the soil. PFM decreased the LFOC and HFOC pools due to the fast decomposition of “old” C and inadequate stabilization of “new” C. Furthermore, PFM accelerated HFOC decomposition to a greater extent than that of LFOC. The Q10 values of SOC decomposition remained similar both in the presence and absence of PFM. Nitrogen fertilization increased the aboveground and root biomass of maize by 54 % and 40 %, respectively. In the control soil, microorganisms decomposed organic N owing to limited availability of mineral N and in the absence of any from replenishment by fertilizer N. Thus, the increase in LFOC content under N fertilization, was primarily attributed to the reduced decomposition of “old” C. The use of N fertilization produced a similar HFOC content as that of the control soil, while also accelerating the decomposition of “old” C and promoting the stabilization of “new” C, resulting in a faster turnover rate. Consequently, the impact of N fertilization on SOC turnover was negligible owing to the contrasting effects on LFOC and HFOC. The application of N fertilization resulted in a reduction of the Q10 value as compared to control. The combination of PFM and N fertilization accelerated the decomposition of HFOC and SOC, while having absent effect on SOC, labile C and persistent C contents. This indicates that 7 years weren’t long enough to trigger a response to the combination of PFM and N fertilization from SOC and HFOC contents. In summary, PFM led to a decline in the SOC content by accelerating the decomposition of both LFOC and HFOC. Conversely, N fertilization maintained SOC content by inhibiting LFOC decomposition and enhancing HFOC decomposition.http://www.sciencedirect.com/science/article/pii/S0016706123003919Light fraction organic carbonHeavy fraction organic carbonRain-fedTemperature sensitivityIsotopic approaches |
| spellingShingle | Kaiping Zhang Zhixin Li Yufei Li Pingxing Wan Ning Chai Ming Li Huihui Wei Yakov Kuzyakov Ekaterina Filimonenko Sulaiman Almwarai Alharbi Feng-Min Li Wenjuan Zhang Feng Zhang Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover Geoderma Light fraction organic carbon Heavy fraction organic carbon Rain-fed Temperature sensitivity Isotopic approaches |
| title | Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover |
| title_full | Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover |
| title_fullStr | Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover |
| title_full_unstemmed | Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover |
| title_short | Contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover |
| title_sort | contrasting impacts of plastic film mulching and nitrogen fertilization on soil organic matter turnover |
| topic | Light fraction organic carbon Heavy fraction organic carbon Rain-fed Temperature sensitivity Isotopic approaches |
| url | http://www.sciencedirect.com/science/article/pii/S0016706123003919 |
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