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| 001 | 864342 | ||
| 005 | 20210130002521.0 | ||
| 024 | 7 | _ | |a 10.1016/j.soilbio.2019.06.003 |2 doi |
| 024 | 7 | _ | |a 0038-0717 |2 ISSN |
| 024 | 7 | _ | |a 1879-3428 |2 ISSN |
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| 100 | 1 | _ | |a Wu, Lei |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Soil organic matter priming and carbon balance after straw addition is regulated by long-term fertilization |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2019 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Straw incorporation is crucial to soil organic carbon (SOC) sequestration, thus improving soil fertility and mitigating climate change. The fate of straw C and the associated net SOC balance remain largely unexplored, particularly in soils subjected to long-term mineral and organic fertilization. To address this, soil (δ13C: –19‰) that had been continuously cropped with maize for 31 years and subjected to five long-term fertilization regimes, including (i) control (Unfertilized), (ii) mineral fertilizer (NPK) application, (iii) 200% NPK (2 × NPK) application, (iv) manure (M) application, and (v) NPK plus manure (NPKM) application, was incubated with or without addition of rice straw (δ13C: –29‰) for 70 days. Straw addition largely primed SOC mineralization. The priming effect (PE) was considerably higher in 2 × NPK (+122% of CO2 from soil without straw addition) but lower in M (+43%) relative to the unfertilized soil (+82%), highlighting the importance of fertilization in controlling PE intensity. Fertilization increased the straw-derived microbial biomass C by 90–577% and straw-derived SOC by 34–68% compared to the unfertilized soil, primarily due to the increased abundance of Gram-negative bacteria and cellobiohydrolase activity. Straw-derived SOC was strongly positively correlated with straw-derived microbial biomass C, suggesting that dead microbial biomass (necromass) was a dominant precursor of SOC formation. Consequently, fertilization facilitated microbial utilization of straw C and its retention in soil, particularly in the M and NPKM fertilized soils. The amounts of straw-derived SOC overcompensated for the SOC losses by mineralization, resulting in net C sequestration which was highest in the NPK fertilized soil. Our study emphasizes that NPK fertilization decreases the intensity of the PE induced by straw addition and increases straw C incorporation into SOC, thus facilitating C sequestration in agricultural soils. |
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| 700 | 1 | _ | |a Zhang, Wenju |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Wei, Wenjuan |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a He, Zhilong |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Kuzyakov, Yakov |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Bol, Roland |0 P:(DE-Juel1)145865 |b 5 |
| 700 | 1 | _ | |a Hu, Ronggui |0 P:(DE-HGF)0 |b 6 |e Corresponding author |
| 773 | _ | _ | |a 10.1016/j.soilbio.2019.06.003 |g Vol. 135, p. 383 - 391 |0 PERI:(DE-600)1498740-5 |p 383 - 391 |t Soil biology & biochemistry |v 135 |y 2019 |x 0038-0717 |
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