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Quantifying carbon input for targeted soil organic carbon sequestration in China's croplands.
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- Author(s): Wang, Guocheng; Huang, Yao; Zhang, Wen; Yu, Yongqiang; Sun, Wenjuan
- Source:
Plant & Soil; Sep2015, Vol. 394 Issue 1/2, p57-71, 15p, 1 Diagram, 3 Charts, 2 Maps- Subject Terms:
- Source:
- Additional Information
- Subject Terms:
- Abstract: Background and aims: Increasing the soil organic carbon (SOC) pool in croplands can not only promote crop production but also mitigate climate change. The objective of this work was to quantify the needed C input rates for both maintaining China's cropland SOC and improving it to global average level. Methods: By using a biogeophysical model (Agro-C), we performed simulations with a high spatial resolution (10 × 10 km) across China's croplands to quantify the C input rate under given scenarios. Results: The model simulations showed that an average C input of 2.1 Mg C ha year is required to stop soil C loss and that SOC density could approach the global mean of 55 Mg C ha by 2050 when 5.1 Mg C ha year is incorporated into the soils. Conclusions: The quantified C inputs showed a large spatial disparity, depending on the existing SOC level, mean annual temperature and precipitation. The existing SOC level in Heilongjiang Province, where the cropland area accounts for 9.2 % of the national total, is much higher but the current C input is much lower than it is elsewhere. Increasing the organic C input should be given priority in this province. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Plant & Soil is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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