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Effects of polyacrylamide, biopolymer and biochar on the decomposition of 14C-labelled maize residues and on their stabilization in soil aggregates

Title data

Awad, Yasser Mahmoud ; Blagodatskaya, Evgenia ; Ok, Yong Sik ; Kuzyakov, Yakov:
Effects of polyacrylamide, biopolymer and biochar on the decomposition of 14C-labelled maize residues and on their stabilization in soil aggregates.
In: European Journal of Soil Science. Vol. 64 (2013) Issue 4 . - pp. 488-499.
ISSN 1351-0754
DOI: https://doi.org/10.1111/ejss.12034

Abstract in another language

The efficacy of applying plant residues to agricultural soils as a carbon (C) source for microorganisms and C sequestration is dependent on soil physiochemical properties, which can be improved by aggregation using soil conditioners. However, no attempt has been made to assess the effects of soil conditioners such as biochar (BC), biopolymer (BP) or polyacrylamide (PAM) on plant residue decomposition. We assessed the effects of BC, synthesized BP and anionic PAM on the decomposition of 14C-labelled maize residues and on their stabilization in aggregate fractions in sandy and sandy loam soils. Polyacrylamide and BP were applied at 400 kg ha−1 and BC was applied at 5000 kg ha−1, and the soils were incubated for 80 days at 22°C. The conditioners improved the physical and biological properties of both soils, as shown by a 24% increase in the 1–2 mm aggregates. Biochar and BP accelerated the decomposition of plant residues as indicated by 14CO2 efflux, and resulted in reduced stabilization of residues in both soils relative to that observed in the control and PAM treatments. The reduction in 14C incorporation and C stabilization in the BC- and BP-treated soils was observed mainly in the

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER120381
Institutions of the University: Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Jul 2015 05:41
Last Modified: 22 Jul 2015 05:41
URI: https://eref.uni-bayreuth.de/id/eprint/16972