An increase in topsoil SOC stock of China's croplands between 1985 and 2006 revealed by soil monitoring

Pan, Genxing; Xu, Xiao Le; Smith, Pete; Pan, Weinan; Lal, Rattan

doi:10.1016/j.agee.2009.12.011

Cited by 170 publications

(110 citation statements)

References 27 publications

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“…At national scale, a similar trend was also observed by Yan et al [18], who compared soil profile data from the periods of 1979-1982 and 2007-2008 The results obtained in this paper are consistent with these earlier assessments for the detection of a downward trend in cropland SOM in NEC during the past 20 years. But our assessment on the extent of this downward trend in terms of cropland area differs from previous studies [10,32]. Firstly, we adopted a systematic sampling strategy and collected 750 samples on cropland of NEC, resulting in a considerably fair spatial coverage (Figure 1).…”

Section: Comparison With Previous Assessmentsmentioning

confidence: 80%

Cropland soil organic matter content change inNortheast China, 1985-2005

Yao

Tang

et al. 2015

Open Geosciences

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Soil organic matter (SOM) content is one of the most important indicators of soil quality and hence the productive capacity of soils. Northeast China (NEC) is the most important region in grain production in China. In this study, we assessed the spatiotemporal change of cropland SOM content in NEC using sampling data of 2005 and survey data of 1985. We also analysed the driving forces behind the SOM content change. Our results showed that SOM content decreased in 39% of all the cropland in NEC, while increase in SOM content was only detected on 16% of the cropland. SOM remained unchanged in nearly half (i.e. 45%) of the cropland. Our results also revealed that cropping intensity and fertilizer application were the two most important factors driving SOM change. Overall, results from this research provided novel details of the spatiotemporal patterns of cropland SOM content change in NEC which was not revealed in earlier assessments. The datasets presented here can be used not only as baselines for the calibration of process-based carbon budget models, but also to identify regional soil quality hotspots and to guide spatial-explicit soil management practices.

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Section: Comparison With Previous Assessmentsmentioning

confidence: 80%

Cropland soil organic matter content change inNortheast China, 1985-2005

Yao

Tang

et al. 2015

Open Geosciences

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“…6), respectively. It was even slightly faster than that of paddy soils (0.099 g kg −1 year −1 ), which were considered to be more efficient in sequestrating carbon than upland soils (Pan et al 2010;Pan et al 2003a;Qin et al 2013;Sun et al 2010). Therefore, the NCP might be the region with the fastest SOC accumulation rate during the last three decades.…”

Section: Soc Evolutions During the Last 30 Yearsmentioning

confidence: 95%

“…We defined the SOC change (SOCC) as the difference between the initial and final values in the reported period. SOC changes often depend on the baseline SOC values, and the relative change in the baseline may better reflect the SOC change under climate change and land use management (Pan et al 2010), Similar to Bellamy et al (2005), we utilized the SOCC rate (g kg −1 year −1…”

Section: Soc Datamentioning

confidence: 99%

Changes and controlling factors of cropland soil organic carbon in North China Plain over a 30-year period

Han¹,

Sun²,

Li³

et al. 2016

Plant Soil

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Aims Try to detect the spatiotemporal dynamics and the controlling factors of soil organic carbon (SOC) in the North China Plain (NCP) over the last 30 years: 1980s-2010s. Methods We investigated the SOC evolution by compiling data from 32 published papers during the last 30 years. Then we examined the spatial pattern and controlling factors by analysing a two-period sampling observations (1980s and 2010s) and multiple explanatory variables in four typical counties.

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“…Crop straw was widely harvested for fuel but, with the 20 improvement in rural livelihoods after the 1990s, farmers have tended to switch to electricity, liquid gas or coal (Zhang et al, 2017), introducing challenges for managing large amounts of 'waste' straw (Kong et al, 2014). The recently renewed recognition of the importance of SOC for soil health and quality has encouraged straw incorporation as a simple and environmentally-friendly measure to effectively enhance cropland SOC levels (Pan et al, 2010) and to improve crop production .…”

Section: Introductionmentioning

confidence: 99%