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

Fang He, Linlin Shi, Jingcheng Tian and Lijuan Mei
Additional contact information
Fang He: Jiaozuo University, Jiaozuo, P.R. China
Linlin Shi: Instituteof Agricultural Science in Taihu Lake District, Suzhou, P.R. China
Jingcheng Tian: Jiaozuo University, Jiaozuo, P.R. China
Lijuan Mei: College of Environmental Science and Engineering, Yangzhou University, Yangzhou, P.R. China

Plant, Soil and Environment, 2021, vol. 67, issue 1, 1-7

Abstract: 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.

Keywords: carbon input estimation; soil quality; terrestrial ecosystem; long-term experiment; paddy soil (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://pse.agriculturejournals.cz/doi/10.17221/478/2020-PSE.html (text/html)
http://pse.agriculturejournals.cz/doi/10.17221/478/2020-PSE.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:67:y:2021:i:1:id:478-2020-pse

DOI: 10.17221/478/2020-PSE

Access Statistics for this article

Plant, Soil and Environment is currently edited by Mgr. Kateřina Součková

More articles in Plant, Soil and Environment from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().