张玉铭, 董文旭, 曾江海, 陈德立. 玉米地土壤反硝化速率与N2O排放通量的动态变化[J]. 中国生态农业学报(中英文), 2001, 9(4): 70-72.
引用本文: 张玉铭, 董文旭, 曾江海, 陈德立. 玉米地土壤反硝化速率与N2O排放通量的动态变化[J]. 中国生态农业学报(中英文), 2001, 9(4): 70-72.
ZHANG Yu-Ming, DONG Wen-Xu, ZENG Jiang-Hai, CHEN De-Li. Dynamic of denitrification rate and N2O flux in maize field[J]. Chinese Journal of Eco-Agriculture, 2001, 9(4): 70-72.
Citation: ZHANG Yu-Ming, DONG Wen-Xu, ZENG Jiang-Hai, CHEN De-Li. Dynamic of denitrification rate and N2O flux in maize field[J]. Chinese Journal of Eco-Agriculture, 2001, 9(4): 70-72.

玉米地土壤反硝化速率与N2O排放通量的动态变化

Dynamic of denitrification rate and N2O flux in maize field

  • 摘要: 应用乙炔抑制原状土柱培育法测定了4种施肥处理的玉米地N素反硝化损失速率和氧化亚氮(N2O)排放通量,并分析了它们与土壤湿度、土壤温度以及硝态氮(NO-3-N)含量之间的关系,计算了因反硝化和N2O排放造成的N肥损失率。结果表明,玉米生育期内土壤N素的反硝化损失量为0.67~3.85kg/hm2,N肥的反硝化损失率为0.5%~1.5%;土壤N2O排放总量为0.55~1.42kg/hm2,N肥的N2O排放系数为0.2%~0.5%。

     

    Abstract: Denitrification rates and N2O fluxes are measured by using the acetylene inhibition method on intact soil cores in different N-fertilized maize plots.The relationships among denitrification rate and N2O flux with soil moisture,soil temperature and NO-3-N concentration in soil are analyzed,and losses of N-fertilizer caused by denitrification and N2O emission are calculated.The results show that denitrification loss from soil is 0.67~3.85kg/hm2 during the growing period of maize,percentage of denitrification loss from N-fertilizer is 0.5%~1.5%,the total N2O emission is 0.55~1.42kg/hm2,and N2O emission coefficient of N-fertilizer is 0.2%~0.5%.

     

/

返回文章
返回