Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 67, Issue 41, Pages 11322-11330Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.9b03323
Keywords
biochar; priming effect; sweet potato residue; three C sources; C isotope label
Funding
- Water Pollution Control and Treatment of China [201SZX07204, 2017ZX07602]
- National Natural Science Foundation of China [41203062, 51438008]
- Jiangsu Nature Science Fund [BK20151378, BE2015708]
- Fundamental Research Funds for the Central Universities [090514380001]
- Natural Science Fund for Colleges and Universities in Jiangsu Province [16KJB610004]
- Natural Science Foundation of Guangdong Province [2016A030313021]
- Guangzhou Science and Technology Plan Scientific Research Project [201607010259]
Ask authors/readers for more resources
The simultaneous effects of biochar on soil organic matter (SOM, C4) and sweet potato (SP) residue (Ipomoea batatas, C3) mineralization were studied over 180 days via C-13 and C-14 isotopic label partitioning. Upon concomitant SP residue addition, biochar mineralization decreased by 11% of the total added biochar-C. Compared to positive priming effects induced by biochar amendment alone on SOM (0.46 mg C g(-1) soil) at 180 days, amendment solely with SP residues induced significantly larger effects (1.5 mg C g(-1) soil). Combination biochar and SP residue addition reduced SOM mineralization by 20.5% and increased SP residue mineralization by 10.1%. Biochar addition caused preferential uptake of SP residues over SOM by microbes. Thus, the lower priming effects on SOM and CO2 emission induced by biochar amendment with or without SP residues compared to that from SP residue addition alone may result in crop residues being partly pyrolyzed to biochar in the cropland.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
