scholarly journals Effects of long-term fertilisation on soil organic carbon sequestration after a 34-year rice-wheat rotation in Taihu Lake Basin

2021 ◽  
Vol 67 (No. 1) ◽  
pp. 1-7
Author(s):  
Fang He ◽  
Lin-lin Shi ◽  
Jing-cheng Tian ◽  
Li-juan Mei
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Cropping System ◽  
Lake Basin ◽  
Long Term Effects ◽  
Mineral N ◽  
Organic Fertiliser ◽  
Sequestration Rate ◽  
Soc Fractions

To evaluate the long-term effects of fertilisation on soil organic carbon (SOC) sequestration in rice-wheat cropping ecosystems, SOC dynamics, stocks and fractionation were determined. The treatments included no fertiliser, mineral N and P, mineral N, P and K, organic fertiliser (OF), OF plus NP and OF plus NPK. The results showed that the average carbon inputs that derived from crop stubble, root residues and organic fertilisers were between 1.47 and 4.33 t/ha/year over the past 34 years. The average SOC stocks measured in the samples collected in 2011–2013 ranged from 31.20 to 38.52 t/ha. The range of the SOC sequestration rate was 0.11–0.40 t/ha/year with a SOC sequestration efficiency of 6.3%. Overall, organic fertilisation significantly promoted C-input, SOC and the sequestration rate compared to mineral fertilisation. The "active pool" (very labile and labile fractions) and "passive pool" (less labile and recalcitrant fractions) accounted for about 71.0% and 29.0% of the SOC fractions, respectively. Significant positive relationships between C-inputs and SOC fractions indicated that SOC was not saturated in this typical rice-wheat cropping system, and fertilisation, especially organic amendment, is an effective SOC strategy sequestration.  

scholarly journals Chemical composition of soil organic carbon changed by long-term monoculture cropping system in Chinese black soil

2018 ◽  
Vol 64 (No. 11) ◽  
pp. 557-563 ◽  
Author(s):  
Yunfa Qiao ◽  
Shujie Miao ◽  
Yingxue Li ◽  
Xin Zhong
Keyword(s):  
Chemical Composition ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Relative Proportion ◽  
Cropping System ◽  
Black Soil ◽  
Chemical Compositions ◽  
Crop Species ◽  
Rotation System

Monoculture is common to meet commodity grain requirements in Northeast China. The effect of long-term monoculture on chemical composition of soil organic carbon (SOC) remains unclear. This study was done to evaluate how changes in chemical compositions of SOC responded to long-term monoculture. To achieve this objective, the chemical compositions of SOC in maize-soybean rotation, continuous soybean and continuous maize were characterized with the nuclear magnetic resonance technique. Two main components, O-alkyl and aromatic C, showed a wider range of relative proportion in monoculture than rotation system across soil profiles, but no difference was observed between two monoculture systems. Pearson’s analysis showed a significant relationship between plant-C and OCH<sub>3</sub>/NCH, alkyl C or alkyl O-C-O, and the A/O-A was closely related to plant-C. The findings indicated a greater influence of monoculture on the chemical composition of SOC compared to rotation, but lower response to crop species.

Impact of Long-Term No-Tillage and Cropping System Management on Soil Organic Carbon in an Oxisol: A Model for Sustainability

2008 ◽  
Vol 100 (6) ◽  
pp. 1787-1787 ◽  
Author(s):  
Ademir Calegari ◽  
W. L. Hargrove ◽  
Danilo Dos Santos Rheinheimer ◽  
Ricardo Ralisch ◽  
Daniel Tessier ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Cropping System ◽  
System Management ◽  
No Tillage

Long-term effects of contrasting tillage on soil organic carbon, nitrous oxide and ammonia emissions in a Mediterranean Vertisol under different crop sequences

2018 ◽  
Vol 619-620 ◽  
pp. 18-27 ◽  
Author(s):  
Giuseppe Badagliacca ◽  
Emilio Benítez ◽  
Gaetano Amato ◽  
Luigi Badalucco ◽  
Dario Giambalvo ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Ammonia Emissions ◽  
Long Term Effects

Long-term effects of no-tillage management practice on soil organic carbon and its fractions in the northern China

Geoderma ◽  
2014 ◽  
Vol 213 ◽  
pp. 379-384 ◽  
Author(s):  
Enke Liu ◽  
Saba Ghirmai Teclemariam ◽  
Changrong Yan ◽  
Jianmin Yu ◽  
Runsheng Gu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Management Practice ◽  
Northern China ◽  
No Tillage ◽  
Long Term Effects

scholarly journals Effects of long-term fertilisation on aggregates and dynamics of soil organic carbon in a semi-arid agro-ecosystem in China

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4758 ◽  
Author(s):  
Jiaoyang Zhang ◽  
Caili Sun ◽  
Guobin Liu ◽  
Sha Xue
Keyword(s):  
Fractal Dimension ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Clay Fraction ◽  
Size Class ◽  
Organic Polymer ◽  
Strongly Correlated ◽  
Organic Fertiliser ◽  
Semi Arid

BackgroundLong-term fertilisation has a large influence on soil physical and chemical properties in agro-ecosystems. The effects on the distribution of aggregates, however, are not fully understood. We determined the dynamic change of the distribution of aggregates and soil organic carbon (SOC) content over time in a long-term field experiment established in 1998 on the Loess Plateau of China and illustrated the relationship between them.MethodsWe determined SOC content and the distribution of aggregates in nine fertiliser treatments: manure (M); nitrogen (N); phosphorus (P); M and N; M, N, and P; M and P; N and P; bare land; and an unfertilised control. These parameters were then used for a path analysis and to analyse the fractal dimension (Dv).ResultsThe organic fertiliser increased SOC content. The proportions of 0.1–0.25 mm microaggregates and 0.25–0.5 mm macroaggregates were higher and the proportion of the 0.01–0.05 mm size class of the silt + clay fraction was lower in the treatments receiving organic fertiliser (M, MN, MNP, and MP) than that in the control, indicating that the addition of organic fertiliser promoted aggregation. The distribution of aggregates characterised by their fractal dimension (Dv), however, did not differ among the treatments.DiscussionDvwas strongly correlated with the proportion of the <0.002 mm size class of the silt + clay fraction that did not differ significantly among the treatments. The change in the distribution of aggregates was strongly correlated with SOC content, which could produce organic polymer binding agents to increase the proportion of larger particles. Long-term application of organic fertiliser is thus necessary for the improvement and maintenance of soil quality in semi-arid agricultural land when residues are removed.

scholarly journals Estimating Soil Organic Carbon Under Different Land-Use Types in Australia’s Northern Grains Region Using Mid-Infrared Spectroscopy

Proceedings ◽  
2020 ◽  
Vol 36 (1) ◽  
pp. 141
Author(s):  
Alwyn Williams ◽  
Ryan Farquharson ◽  
David Lawrence ◽  
Jeff Baldock ◽  
Mike Bell
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Native Vegetation ◽  
Land Use Type ◽  
Short Term ◽  
Mid Infrared ◽  
Land Use Types ◽  
Soc Fractions

Land-use type is known to affect levels of soil organic carbon (SOC). However, the degree to which SOC is affected by land-use type over the short—(<10-years) and long—(≥10-years) term remains relatively uncertain. Moreover, there is limited data on the distribution of SOC across particulate (POC), humus (HOC) and resistant (ROC) fractions, and the responses of these fractions to land-use. Using mid-infrared spectroscopy (MIR) coupled with partial least squares regression (PLSR) algorithms generated from the Australian Soil Carbon Research Program (SCaRP), soil organic carbon (TOC, POC, HOC and ROC) was estimated across 280 paired samples across Australia’s Northern Grains Regions. Our analysis covered five land-use types: remnant native vegetation, long-term pasture (≥10-years), short-term pasture (<10-years), short-term cropping (<10-years) and long-term cropping (≥10-years). All land-use types except long-term pasture generated significant declines across all SOC fractions compared with native vegetation. Long-term cropping resulted in the greatest declines, with an average decrease of 6.25 g TOC/kg soil relative to native vegetation. Long-term cropping also reduced POC (−0.71 g/kg) and HOC (−3.19 g/kg) below that of short-term cropping. In addition, the ROC fraction responded to land-use type, with native vegetation and long-term pasture maintaining greater ROC compared with other land-use types. The results demonstrate substantial reductions across all SOC fractions with long-term cropping. The ability of long-term pastures to maintain levels of SOC similar to that of native vegetation indicates the importance of limiting soil disturbance and maintaining more continuous living plant cover within cropping systems.

scholarly journals Effects of Residue Returning on Soil Organic Carbon Storage and Sequestration Rate in China’s Croplands: A Meta-Analysis

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 691
Author(s):  
Xudong Wang ◽  
Cong He ◽  
Bingyang Liu ◽  
Xin Zhao ◽  
Yang Liu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Crop Production ◽  
Management Practice ◽  
Meta Analysis ◽  
Central China ◽  
Mean Annual Precipitation ◽  
Alkaline Soils ◽  
Sequestration Rate

Crop residue returning (RR) is a promising option to increase soil organic carbon (SOC) storage, which is linked to crop yield promotion, ecologically sustainable agriculture, and climate change mitigation. Thus, the objectives of this study were to identify the responses of SOC storage and sequestration rates to RR in China’s croplands. Based on a national meta-analysis of 365 comparisons from 99 publications, the results indicated that RR increased SOC storage by 11.3% compared to residue removal (p < 0.05). Theoretically, when combined with low nitrogen fertilizer input rates (0–120 kg N ha−1), single cropping system, paddy-upland rotation, lower mean annual precipitation (0–500 mm), alkaline soils (pH 7.5–8.5), other methods of RR (including residue chopping, evenly incorporating, and burying) or long-term use (>10 yrs), an increase in SOC storage under RR by 11.6–15.5% could be obtained. The SOC sequestration rate of RR varied from 0.48 (Central China) to 1.61 (Southwest China) Mg C ha−1 yr−1, with a national average value of 0.93 Mg C ha−1 yr−1. Higher SOC sequestration rates enhanced crop production. However, decreases in SOC sequestration rate were observed with increases in experimental durations. The phenomenon of “C saturation” occurred after 23 yrs of RR. Overall, RR can be used as an efficient and environmentally friendly and climate-smart management practice for long-term use.

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