Active carbon pool-size is enhanced by long-term manure application

Meng Wei, Aijun Zhang, Zhonghou Tang, Peng Zhao, Hong Pan, Hui Wang, Quangang Yang, Yanhong Lou and Yuping Zhuge
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Meng Wei: Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province/Xuzhou Sweet Potato Research Center of Jiangsu Province, Xuzhou, P.R. China
Aijun Zhang: Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province/Xuzhou Sweet Potato Research Center of Jiangsu Province, Xuzhou, P.R. China
Zhonghou Tang: Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province/Xuzhou Sweet Potato Research Center of Jiangsu Province, Xuzhou, P.R. China
Peng Zhao: Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province/Xuzhou Sweet Potato Research Center of Jiangsu Province, Xuzhou, P.R. China
Hong Pan: National Engineering Laboratory for Efficient Utilisation of Soil and Fertiliser Resources, College of Resources and Environment, Shandong Agricultural University, Taian, P.R. China
Hui Wang: National Engineering Laboratory for Efficient Utilisation of Soil and Fertiliser Resources, College of Resources and Environment, Shandong Agricultural University, Taian, P.R. China
Quangang Yang: National Engineering Laboratory for Efficient Utilisation of Soil and Fertiliser Resources, College of Resources and Environment, Shandong Agricultural University, Taian, P.R. China
Yanhong Lou: National Engineering Laboratory for Efficient Utilisation of Soil and Fertiliser Resources, College of Resources and Environment, Shandong Agricultural University, Taian, P.R. China
Yuping Zhuge: National Engineering Laboratory for Efficient Utilisation of Soil and Fertiliser Resources, College of Resources and Environment, Shandong Agricultural University, Taian, P.R. China

Plant, Soil and Environment, 2020, vol. 66, issue 11, 598-605

Abstract: We studied the dynamics of soil organic carbon (SOC)-pool mineralisation in agricultural soil. A laboratory incubation experiment was conducted using the soil from a long-term experiment involving the following fertilisation regimes: no fertilisation (CK); mineral (NPK); organic (M), and combined organic-inorganic fertilisers (MNPK). SOC mineralisation rate decreased as follows: MNPK > M > NPK > CK. Cumulative SOC mineralisation (Cm) ranged between 730.15 and 3 022.09 mg/kg in CK and MNPK, respectively; 8.81% (CK) to 20.45% (MNPK) of initial SOC was mineralised after a 360-day incubation. Soil Cm values were significantly higher under NPK, M, and MNPK compared to those under the CK treatment. Dynamic variation in Cm with incubation time fitted a double exponential model. Active carbon pools accounted for 2.06-6.51% of total SOC and the average mean resistant time (MRT1) was 28.76 days, whereas slow carbon pools accounted for 93.49-97.94% of SOC, with an average MRT2 of 8.53 years. The active carbon pool in fertilised soils was larger than in CK; furthermore, it was larger in M- and MNPK- than under NPK-treated plots. SOC decomposed more easily in long-term fertilised plots than in non-fertilised plots.

Keywords: macronutrient; land use management; decomposition; fluvo-aquic soil; long-term fertilisation; organic carbon mineralisation (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:66:y:2020:i:11:id:426-2020-pse

DOI: 10.17221/426/2020-PSE

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