Soil Organic Carbon Stocks as Affected by Tillage Systems in a Double-Cropped Rice Field
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2023, Agricultural Soil Sustainability and Carbon ManagementCurrent status of carbon neutrality in Chinese rice fields (2002–2017) and strategies for its achievement
2022, Science of the Total EnvironmentCitation Excerpt :Furthermore, 82.9 % of the carbon pool is stored in the soil layer (0–100 cm) (Tang et al., 2018). The concentration of SOC decreased with the increase of soil depth, and the content of soil organic carbon at a 0–20 cm depth accounted for 47.82–53.25 % of that at a 0–80 cm depth (Xu et al., 2013). At the same time, due to the long-term interference of agricultural activities, the soil in the tillage layer exhibits the most significant changes.
Can reduced-input direct seeding improve resource use efficiencies and profitability of hybrid rice in China?
2022, Science of the Total EnvironmentCitation Excerpt :This difference is likely the result of the combined effects of water management, straw return, and cultivation methods. Although NT is an important way to improve SOC in paddy fields (Xu et al., 2013a, 2013b; Li et al., 2011), the interaction effect of water regime and straw return methods may be greater in this study. The hypoxic environment caused by flooding can slow down the decomposition of SOC and reduce the loss of carbon pool; under oxygen-rich conditions, not only is the decomposition of SOC accelerated (Pampolino et al., 2008; Xu et al., 2017), but the decomposition of straw in the field is also accelerated, weakening the replenishment effect of straw returning to the carbon pool (Wang et al., 2015).
Impact of long-term agricultural management practices on soil organic carbon and soil fertility of paddy fields in Northeastern Thailand
2020, Geoderma RegionalCitation Excerpt :Global food security is largely dependent on soil fertility, and declining soil fertility and reducing crop yields are among the major causes of acute poverty on a global scale (Guo et al., 2017; Wang et al., 2017; Zhang et al., 2017a; Kome et al., 2018). Soil organic carbon is a large fraction of the soil C pool, plays a crucial role in regulating the global C cycle (Lal, 2004; Baker et al., 2007), and helps maintain long-term soil health (Xu et al., 2013). Moreover, SOC also governs soil aeration, soil water retention and use efficiency, nutrient retention and use efficiency, gaseous emissions, and crop productivity (Lal, 2016; Srivastava et al., 2017).
Soil organic carbon changes following wetland restoration: A global meta-analysis
2019, GeodermaCitation Excerpt :Soil depth was identified as another important influential factor. Different changes in SOC at different soil depths have been widely observed in many ecosystems, such as farmland, grassland and forest (Jackson et al., 2017; Jobbagy and Jackson, 2000; Xu et al., 2013). Our results clearly suggest that most changes in SOC occur in the surface 20-cm soil layer, which was the sampling depth in many studies on SOC (Bai et al., 2014; Zhang et al., 2006).
Supported by the Special Fund for Agro-Scientific Research in the Public Interest of China (Nos. 200903003 and 201103001).