Effects of biochar application on vegetable production and emissions of N_2O and CH_4(Environment)

スポンサーリンク

概要

• 論文の詳細を見る

• A pot experiment was performed to estimate the effect of maize (Zea mays L.) straw biochar application on nitrous oxide (N_2O) and methane (CH_4) emissions, N_2O emission factors and vegetable yield through cultivation of choy sum (Brassica rapa L. ssp. chinensis) and amaranth (Amaranthus mangostanus L.) for 99 days in 2011 at Nanjing, China. Eight treatments were established as follows: control (CK), 100% urea nitrogen (N) (Urea), urea and manure N at 5:5 (UM1) or 7:3 (UM2) combination, biochar incorporation with urea at 20Mg ha^<-1> (UB1) or 40Mg ha^<-1> (UB2) and biochar incorporation at 30Mg ha^<-1> with UM1 (UM1B) or UM2 (UM2B). UB1, UB2, UM1B and UM2B significantly decreased N_2O emission by 77% to 86%, while UM1 and UM2 did not show significant N_2O emission difference in comparison with Urea. CH_4 emissions were not affected by biochar amendment or manure application. On average, UM1B and UM2B significantly enhanced vegetable production by 32, 48 and 28% as compared to Urea, average UM1/UM2 and average UB1/UB2, respectively. N_2O-N emission factors with biochar application were 0.4-0.7%, while those without biochar being 2.5-3.2%. Comprehensively considering vegetable yield, N_2O emission, CH_4 emission and N_2O-N emission factor, the most effective combination in this study was biochar at 30Mg ha^<-1> when applied with chemical N fertilizer and manure. In conclusion, biochar application greatly reduced N_2O emissions and N_2O-N emission factors while maintaining vegetable production.

• 2012-08-00

著者

• LI Bo

  Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University

• JIA Junxiang

  Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University

• CHEN Zhaozhi

  Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University

• XIE Zubin

  State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences

• XIONG Zhengqin

  Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University

関連論文

• Effects of biochar application on vegetable production and emissions of N_2O and CH_4(Environment)
• Annual N_2O and CH_4 emissions from intensively managed vegetable fields in Nanjing, China(Environment)
• Effects of biochar application on vegetable production and emissions of N_2O and CH_4

スポンサーリンク