Effect of Biochar Addition on the Ratio of Soil Denitrification Products:A Review
Soil denitrification is an important pathway of soil nitrogen loss.The large amount of nitrogen fertilizer applied in agricultural production leads to the increase of soil N2O emission,and it has caused environmental problems such as the enhanced greenhouse effect.At the same time,soil denitrification is also the main way of N2O reduction,so controlling the ratio of soil denitrification products N2O/(N2O+N2)is the key to reduce soil N2O emission.Based on a large quantity of relevant researches,this paper summarized the measurement methods and influencing factors of denitrification product ratio in soil and the mechanism of biochar addition affecting soil denitrification product ratio.The results showed that there was still existing uncertainty about the effect of biochar application on denitrification product ratio,and whether biochar addition could effectively regulate denitrification product ratio and reduce N2O emission was affected by some influencing factors,such as soil physicochemical properties,biochar properties and application amount.Based on the above research status,the future prospects for improving the measurement methods of denitrification products and clarifying the quantitative effects of biochar addition denitrification products ratio and its key influencing factors were proposed.
BiocharNitrous oxide reductionNitrogenDenitrification product ratio
NETL
NSTL
万方数据
