title: [Effects of biochar on CO2 and N2O emissions and microbial properties of tea garden soils].
abstract: To clarify the effects of biochar addition (0.5%, 1.5%, 2.5%, 3.5%) on the emission of carbon dioxide (CO2) and nitrous oxide (N2O), pH and microbial communities of the tea garden soil, an indoor incubation experiment was conducted using the acidulated tea-planted soil. Results showed that the emissions of CO2 and N2O and the rate of C, N mineralization were increased in a short term after the addition of biochar compared with the control, while the promoting effect was weakened along with increasing the addition of biochar. The pH, dehydrogenase activity and microbial biomass carbon were increased in the biochar treatments. Phospholi-pid fatty acid (PLFA) with different markers was measured and the most PLFA was detected in the group in the 1.5% biochar treatment with significant differences (P<0.05) compared with the control. In addition, the higher levels of 16:0, 14:0 (bacteria), 18:lω9c (fungi), l0Me18:0 (actinomycetes) groups were observed and there were significant differences (P <0.05) in individual phospholipid fatty acid among the different treatments. Taken together, the acidulated tea-planted soil, soil microbial biomass and microbial number were improved after addition of biochar.
authors.forename: Yun-fei
authors.initials: YF
authors.lastname: Hu
authors.forename: Rong-lin
authors.initials: RL
authors.lastname: Li
authors.forename: Yi-yang
authors.initials: YY
authors.lastname: Yang
mesh_terms: D000383:Agriculture; D001419:Bacteria / Q000254:growth & development; D018533:Biomass; D028241:Camellia sinensis; D002245:Carbon Dioxide / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D005658:Fungi / Q000254:growth & development; D009609:Nitrous Oxide / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology
chemical_list: D012987:Soil; C540010:biochar; D002245:Carbon Dioxide; D002606:Charcoal; D009609:Nitrous Oxide