不同氮水平下有机肥碳氮比对土壤硝态氮残留量的影响

采用盆栽试验的方法，研究N0（不施氮）、N1（施N0．067g／kg）、N2（施N0．133g／kg）、N3（施N 0．266g/kg）、N4（施N 0．400g／kg）4个不同氮水平下施入M1（C／N：31．8）、M2（C／N：42．5）、M3（C／N-66．6）不同C/N的有机肥对土壤NO3^-残留量的影响。结果表明：在N0，N1，N2水平下，3种不同C／N的有机肥对土壤NO3^-残留量的影响不显著，在N3，N4水平下，M1能够增加土壤NO3^-的残留量，M2和M3能够降低土壤NO3^-的残留量。N3M1，N4M1处理的土壤NO3^-含量分别比N3，N4处理增加了11．6％和14．4％；N3M2，N3M3处理分别比N3处理降低了15．9％和37．9％；N4M2，N4M3处理与N4处理相比差异不显著。

Effect of the manure with different C/N under different doses of N fertilizer on the content of soil NO-3

Effect of different C/N manure on the content of soil NO3^- under different doses of N fertilizer was discussed. The results showed that there was no significant effect on soil NO3^- by applying the different manure mixed with low doses of nitrogen fertilizer. Soil NO3^- increased by applying the M1 accompanying with high doses of nitrogen fertilizer. But soil NO3^- decreased by applying the M2 and M3 mixed with high doses of nitrogen fertilizer. Soil NO3^- of N3M1 and N4M1 treatment increased by 11.6 % and 14.4 % respectively, compared with N3 and N4. Soil NO3^- of N3M2 and N3M3 treatment decreased by 15.9% and 37.9% respectively, compared with N3. There was no significant difference between the treatments of N4M2, N4M3 and N4 in effect on soil NO3^-.