Enhanced roles of biochar and organic fertilizer in microalgae for soil carbon sink.
Improved soil carbon sink capability is important for the mitigation of carbon dioxide emissions and the enhancement of soil productivity. Biochar and organic fertilizer (OF) showed a significant improving effect on microalgae in soil carbon sink capacity, and the ultimate soil total organic carbons with microalgae-OF, microalgae-biochar, microalgae-OF-biochar were about 16, 67 and 58% higher than that with microalgae alone, respectively, indicating that carbon fixation efficiency of microalgae applied in soil was improved with biochar and OF whilst the soil carbon capacity was promoted, the mechanism of which is illustrated through simulative experiments. Organic fertilizer could spur algal conversion of carbon into cell molecules by increasing intracellular polysaccharide production of microalgae. Biochar could change carbon metabolism pathway of microalgae through altering the yield of intracellular saccharides, and yield and type of extracellular saccharides. There was a superimposition effect on the soil carbon sink when biochar and OF were both present with microalgae.
CAS Key Laboratory of Low-Carbon Conversion and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 100 Haike Road, Zhangjiang Hi-Tech Park, Pudong Shanghai, 20110, China.
Shiping
S
Zhang
CAS Key Laboratory of Low-Carbon Conversion and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 100 Haike Road, Zhangjiang Hi-Tech Park, Pudong Shanghai, 20110, China.
Liang
L
Wang
CAS Key Laboratory of Low-Carbon Conversion and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 100 Haike Road, Zhangjiang Hi-Tech Park, Pudong Shanghai, 20110, China. weiwei@sari.ac.cn.
Wei
W
Wei
Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, 200444, China. hujiajunsu@shu.edu.cn.
Jiajun
http://orcid.org/0000-0002-3642-947X
J
Hu
CAS Key Laboratory of Low-Carbon Conversion and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 100 Haike Road, Zhangjiang Hi-Tech Park, Pudong Shanghai, 20110, China.
Shouhua
S
Mei
CAS Key Laboratory of Low-Carbon Conversion and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, No. 100 Haike Road, Zhangjiang Hi-Tech Park, Pudong Shanghai, 20110, China.
Quanyu
Q
Zhao
Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China.
Yiu Fai
YF
Tsang
D001673:Biodegradation, Environmental; D002244:Carbon / Q000032:analysis; D057965:Carbon Sequestration; D002606:Charcoal / Q000378:metabolism*; D005308:Fertilizers; D058086:Microalgae / Q000378:metabolism*; D009930:Organic Chemicals / Q000032:analysis; D012987:Soil / Q000737:chemistry*
D005308:Fertilizers; D009930:Organic Chemicals; D012987:Soil; C540010:biochar; D002606:Charcoal; D002244:Carbon
Biochar; Microalgae; Organic fertilizer; Soil carbon sink; Soil total organic carbon