Fertilization increases paddy soil organic carbon density

Wang, Shaoxian; Liang, Xinqiang; Qi-xiang, Luo; Fan, Fang; Chen, Yingxu; Zu-zhang, LI; Sun, Haoran; TianFang, Dai; Wan, Jun-nan; Li, Xiaojun

doi:10.1631/jzus.b1100145

Cited by 29 publications

(16 citation statements)

References 35 publications

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“…The SOC accumulation rate averaged 0.23 t C ha −1 yr −1 over the period 2009–2010 in the present study, generally lower than previous estimates in some double-rice paddy soils under short- or long-term chemical N fertilizer application [30], [61], [62]. However, it falls within the SOC sequestration rate range of 0.13–2.20 t C ha −1 yr −1 estimated by Pan et al [63].…”

Section: Discussioncontrasting

confidence: 64%

Effects of Tillage and Nitrogen Fertilizers on CH4 and CO2 Emissions and Soil Organic Carbon in Paddy Fields of Central China

Zhou

Kou

et al. 2012

PLoS ONE

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Quantifying carbon (C) sequestration in paddy soils is necessary to help better understand the effect of agricultural practices on the C cycle. The objective of the present study was to assess the effects of tillage practices [conventional tillage (CT) and no-tillage (NT)] and the application of nitrogen (N) fertilizer (0 and 210 kg N ha−1) on fluxes of CH4 and CO2, and soil organic C (SOC) sequestration during the 2009 and 2010 rice growing seasons in central China. Application of N fertilizer significantly increased CH4 emissions by 13%–66% and SOC by 21%–94% irrespective of soil sampling depths, but had no effect on CO2 emissions in either year. Tillage significantly affected CH4 and CO2 emissions, where NT significantly decreased CH4 emissions by 10%–36% but increased CO2 emissions by 22%–40% in both years. The effects of tillage on the SOC varied with the depth of soil sampling. NT significantly increased the SOC by 7%–48% in the 0–5 cm layer compared with CT. However, there was no significant difference in the SOC between NT and CT across the entire 0–20 cm layer. Hence, our results suggest that the potential of SOC sequestration in NT paddy fields may be overestimated in central China if only surface soil samples are considered.

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Section: Discussioncontrasting

confidence: 64%

Effects of Tillage and Nitrogen Fertilizers on CH4 and CO2 Emissions and Soil Organic Carbon in Paddy Fields of Central China

Zhou

Kou

et al. 2012

PLoS ONE

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“…which was consistent with related research (Li et al, 2013;Wang et al, 2012). Soil C:N ratio has a direct relationship with the C:N ratio of the crop biomass that is added to the soil.…”

Section: Discussionsupporting

confidence: 92%

“…Our results showed that soil carbon storage showed a tendency to decrease with soil depth under different nitrogen fertilization in coastal saline zone. The results of this research on Jerusalem artichoke were consistent with those of previous studies that N applications increased soil carbon storage compared with CK (Bi et al, 2009;Wang et al, 2012). Recent studies suggested that excess soil N affects C degradation (Liu and Crowley, 2009;Manning et al, 2008); in agreement with those results, our study showed that soil organic carbon decreased when more 8 g urea m −2 nitrogen applied (Table 3).…”

Section: Discussionsupporting

confidence: 92%

Carbon sequestration and Jerusalem artichoke biomass under nitrogen applications in coastal saline zone in the northern region of Jiangsu, China

Chen

Gao

et al. 2016

Science of The Total Environment

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“…Phosphatase activities decreased with increasing soil depth (Figures 1, 2), dramatically in the plow layer and then gently under the plow layer due to the decreasing soil organic matter (Wang et al 2012b) and oxygen with depth.…”

Section: Resultsmentioning

confidence: 98%

Phosphorus loss potential and phosphatase activities in paddy soils

Wang¹,

Liu²,

Li³

et al. 2013

Plant Soil Environ.

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Phosphorus (P) fertilizers are widely applied to the paddy wetland ecosystems in subtropical China (Ma et al. 2011) ABSTRACTThe effects of phosphorus (P) fertilizer on P loss potential, soil Olsen-P and neutral phosphatase activities in paddy soils fertilized with superphosphate or pig manure (PM) were evaluated in this paper. Data were collected from a field experiment in the Tai Lake Basin, China. Superphosphate rates were 0, 17.5, 26.7, and 35.0 kg P/ha, and PM rates were 0, 1.4, 2.1, and 2.8 t/ha for each crop, respectively. Soil Olsen-P in the plow layer increased to a greater extent with PM than with superphosphate. Pig manure increased neutral phosphatase activities in the plow layer compared with PM-free treatment. In contrast, superphosphate inhibited neutral phosphatase activities compared with superphosphate-free treatment. Spring application of P fertilizer markedly increased the total P of surface water in November (< 0.01 vs. 0.10 mg/L) compared with P-free treatment. The total P of shallow groundwater at a 75 cm depth was ~0.01 mg/L. Phosphorus fertilizer did not influence Olsen-P or neutral phosphatase activities under the plow layer. Downward movement of P did not occur. Appropriate rate of P application of 26.2 kg P/ha for each crop in this soil reduced the risk of P loss in the paddy wetland ecosystem.

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Fertilization increases paddy soil organic carbon density

Cited by 29 publications

References 35 publications

Effects of Tillage and Nitrogen Fertilizers on CH4 and CO2 Emissions and Soil Organic Carbon in Paddy Fields of Central China

Effects of Tillage and Nitrogen Fertilizers on CH4 and CO2 Emissions and Soil Organic Carbon in Paddy Fields of Central China

Carbon sequestration and Jerusalem artichoke biomass under nitrogen applications in coastal saline zone in the northern region of Jiangsu, China

Phosphorus loss potential and phosphatase activities in paddy soils

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