Application of Hydrochar Altered Soil Microbial Community Composition and the Molecular Structure of Native Soil Organic Carbon in a Paddy Soil

Published on Mar 3, 2020in Environmental Science & Technology7.149
· DOI :10.1021/acs.est.9b05864
Ke Sun28
Estimated H-index: 28
Lanfang Han15
Estimated H-index: 15
+ 6 AuthorsBaoshan Xing87
Estimated H-index: 87
The benefits and disadvantages of hydrochar incorporation into soil have been heavily researched. However, the effect of hydrochar application on the soil microbial communities and the molecular structure of native soil organic carbon (SOC) has not been thoroughly elucidated. This study conducted an incubation experiment at 25 oC for 135 d using a soil column with 0.5 and 1.5% hydrochar-amended paddy soil to explore the interconnections between changes in soil properties and microbial communities and shifts in native SOC structure using ESI-FT-ICR-MS and NMR after hydrochar application. Hydrochar addition decreased the labile SOC fraction by 15.6-33.6% and increased the stable SOC fraction by 10.3-27.0%. These effects were significantly stronger for 1.5% hydrochar-treated soil. Additionally, hydrochar addition induced the native SOC with 1.0-3.0% more carbon and 6.0-13.0% higher molecular weight. The SOC in hydrochar-amended soil contained more aromatic compounds but fewer carbohydrates and lower polarity...
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