Carbon sequestration and its potential in agricultural soils of China

Sun, Wenke; Huang, Yao; Zhang, Wen; Yu, Yongqiang

doi:10.1029/2009gb003484

Cited by 101 publications

(100 citation statements)

References 67 publications

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“…The soil C sequestration amounts in Scenarios I and II could respectively account for 2.43 % and 2.83 % of the C emissions from fuel use in China in 2010 (2.18 Pg C, IEA 2011). Soil C sequestration following adoption of SI in our results was slightly higher than in other reports from China (Table 4), because straw inputs were underestimated in previous reports (Yan et al 2007;Lu et al 2009;Sun et al 2010). Overall, soil C sequestration rates in China were higher than in Europe and the United States (Table 4), which might be attributable to the relatively larger initial soil organic C content in the other countries (Li et al 2003).…”

Section: Estimates Of Soil C Sequestration Under Si In Chinacontrasting

confidence: 55%

How can straw incorporation management impact on soil carbon storage? A meta-analysis

2014

Mitig Adapt Strateg Glob Change

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Straw incorporation (SI) is a common practice in China and has important implications for agricultural sustainability. This study aimed to quantitatively summarise the response of top soil (0-20 cm) carbon (C) to SI under different agricultural management regimes. Results indicated that compared with straw removal (SR), SI significantly increased soil C storage by 12 %. Moreover, incorporation of chopped straw with tillage treatment (ploughing and rotary tillage) increased C storage compared to unchopped straw without tillage treatment. SI implementation with upland cropping, in the northwest and northeast resulted in higher C storage compared with rice cropping, and in the northern and southern regions. Changes in soil C were observed based on SI variables, including tillage and straw amounts in fine-textured soils, however straw amount rather than tillage treatment exhibited a greater influence on soil C in coarse-textured soils. We concluded SI implementation with increased amounts of chopped straw for a longer duration was favourable to soil C sequestration in Chinese croplands. Furthermore, we estimated if SI was popularised across all of China's agricultural regions, soil C sequestration potential would reach 48.25 6.2 Tg C year −1. SI practices should therefore be encouraged.

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Section: Estimates Of Soil C Sequestration Under Si In Chinacontrasting

confidence: 55%

How can straw incorporation management impact on soil carbon storage? A meta-analysis

2014

Mitig Adapt Strateg Glob Change

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“…With recurring application of mineral fertilizers matched to yield demands, soil fertility in China has improved in terms of soil nutrient status, but also soil organic carbon (SOC) since the 1980s (Sun et al, 2010). However, as several long-term field studies observed, excessive soil fertility, especially N fertilizer over-inputs in North China and East China caused nutrient imbalances, contributing to acidification, and decreasing C/N ratios (Darilek et al, 2009;Peng, 2011), but also resulting in a reduced yield response to continuously increasing chemical fertilizer use .…”

Section: Factors Influencing Regional Grain Yields Over the Last 20 Ymentioning

confidence: 99%

Changes in regional grain yield responses to chemical fertilizer use in China over the last 20 years

Wang

Dan

Grant

et al. 2018

J. Soil Sci. Plant Nutr.

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A major challenge facing China is to meet the increasing food demand of its growing population in the face of decreasing arable land area, while sustaining or improving soil productivity and avoiding adverse environmental impacts from intensive agriculture. This study uses data from China Statistical Yearbooks to analyze trends in regional soil productivity and grain yields in the major grain-producing regions in North China (NC), Northeast China (NE), East China (EC), Central China (CC), and Southwest China (SW), associated with regional fertilizer use and annual climate variation in rainfall and mean temperature over the 20 years. During 1992-2012, the average fertilizer increase rates (in kg ha -1 year -1 ) were in the order of regions CC (6.6) > NC (4.8) > EC (2.4) > SW (2.1) > NE (1.3), while yield responses to fertilizer use (with regression model coefficients, in kg kg -1 ) were in the order: SW (-0.9) < CC (1.1) < NC (1.7) < EC (5.7) < NE (9.3), showing higher yield responses to fertilizer use for NE and EC than for other regions. The changes in regional grain yields also showed higher yield responses to soil-based productivity for NC, CC, and SW, or to annual climate variability for CC than for other regions, indicating that other factors (such as inherent soil productivity or annual climate variability could be more important than fertilizer in affecting yields. The strategies for regulating nutrient management are needed considerably based on regional indigenous soil nutrient supply under varying regional climate conditions.

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“…Furthermore, SOC losses from China's croplands have been widely reported (Huang and Sun, 2006;Qin et al, 2013;Sun et al, 2010). SOC stocks of agro-ecosystems may be increased by improving agronomic practices.…”

Section: Introductionmentioning

confidence: 99%

Effects of enhancing soil organic carbon sequestration in the topsoil by fertilization on crop productivity and stability: Evidence from long-term experiments with wheat-maize cropping systems in China

Zhang

Sun

et al. 2016

Science of The Total Environment

102

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Carbon sequestration and its potential in agricultural soils of China

Cited by 101 publications

References 67 publications

How can straw incorporation management impact on soil carbon storage? A meta-analysis

How can straw incorporation management impact on soil carbon storage? A meta-analysis

Changes in regional grain yield responses to chemical fertilizer use in China over the last 20 years

Effects of enhancing soil organic carbon sequestration in the topsoil by fertilization on crop productivity and stability: Evidence from long-term experiments with wheat-maize cropping systems in China

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