摘要
以沈阳生态站长期定位试验为研究平台,对不同施肥制度下潮棕壤氮素功能群活性进行研究。结果表明:与不施肥相比,长期施肥明显提高土壤氨化作用,硝化作用和反硝化作用强度,其中以NPK+M处理提高幅度最大;而长期施肥均明显抑制土壤固氮作用强度,其中氮肥抑制效果远大于有机肥。相关分析结果显示:土壤氨化作用,硝化作用和反硝化作用强度均与土壤养分含量呈显著正相关;而固氮作用强度与土壤大部分养分含量呈显著负相关,表明土壤氮素功能群活性易受土壤养分状况的影响,可以灵敏地反映土壤肥力质量变化。
The activity of nitrogen functional groups in aquic brown soil under different fertilization systems was studied in long-term field experiment of Shenyang Experimental Station of Ecology.The results showed that compared with control,long-term fertilization significantly improved soil ammonification,nitrification and denitrification intensity,and the greatest increase was observed in NPK＋M treatment.Soil nitrogen fixation strength was significantly inhibited under long-term fertilization,and the effect of fertilizer N was much greater than organic fertilizer.Correlation analysis showed that soil ammonification,nitrification,and nitrification intensity were significantly and positively correlated to soil nutrient content,while the nitrogen fixation intensity was significantly and negatively correlated to most of soil nutrient content,indicating that activity of soil nitrogen function groups is vulnerable to soil nutrient status,and thus can reflect the change of soil fertility sensitively.
出处
《水土保持学报》
CSCD
北大核心
2010年第3期160-163,169,共5页
Journal of Soil and Water Conservation
基金
中国科学院创新项目(KZCX2-YW-407)
国家科技支撑计划课题(2007BAD89B02)
国家自然科学基金(40701067)
关键词
氮素功能群
氨化作用
硝化作用
反硝化作用
固氮作用
nitrogen functional groups
ammonification
nitrification
denitrification
nitrogen fixation
