摘要
研究单施有机肥模式下,3,4-二甲基吡唑磷酸盐(DMPP)对土壤有机氮素转化的影响,为土壤氮素高效利用和减少损失提供科学依据。采用土壤恒温培养试验,研究单施有机肥条件下不同DMPP添加水平对土壤中有机氮素转化及硝化抑制效应的影响。结果表明,单施有机肥条件下,DMPP可明显抑制土壤硝化反应的进程。培养期间DMPP最佳硝化抑制效果出现在14d,与不添加DMPP的处理相比,添加DMPP的处理铵态氮含量增加2~3倍,硝态氮含量减少2~3倍。14d后DMPP硝化抑制效果逐渐减弱。DMPP对硝化反应的抑制效果及有效抑制时间随着DMPP用量的增加而不断增强,但是当用量增加到2%以上水平时,硝化抑制剂效果不再明显增强。综合用量水平和抑制效果,施用有机肥模式下DMPP添加量以氮素含量的1%~2%较为适宜。
In order to improve the efficiency of nitrogen utilization and decrease the nitrogen loss,the influence of DMPP(3,4-dimethypyrazole phosphate) addition on soil nitrogen transformation under the organic fertilizers system were studied.Influence of DMPP addition on soil nitrogen transformation and ammonium oxidation inhibiting with different concentration of DMPP under the organic fertilizers system were studied by aerial soil incubation method.The results showed that,the process of nitration was obviously restrained with DMPP addition under the organic fertilizers system.The optimum efficiency of DMPP appeared on the 14th day.Compared to the treatment without DMPP addition,the NH+4-N content was increased by 2~3 times,meanwhile,the NO-3-N content was reduced by 2~3 times in those treatments with DMPP addition.Effects of nitrification inhibitor with DMPP addition showed a decreasing tendency after 14 days.Effects of DMPP on the nitrification inhibitor were enhanced with the increasing level of DMPP amount,but the inhibitory effect was no longer greatly enhanced when DMPP increased to a certain level above 2%.The optimize amount of DMPP was 1% to 2% in the organic fertilizers application in the agriculture production,concerning about the nitrification inhibitor effect and DMPP application level in the soil.
出处
《水土保持学报》
CSCD
北大核心
2012年第6期111-115,共5页
Journal of Soil and Water Conservation
基金
国家自然科学基金项目(31172030)
浙江省自然科学基金项目(Y3090180)
国际科技合作项目(2011DFA91190)
关键词
硝化抑制剂
DMPP
有机肥
氮素转化
nitrification inhibitor
DMPP
organic fertilizer
nitrogen transformation