摘要
23年定位试验结果表明:土壤有机碳、全氮和碱解氮、生物氮量以:高量有机肥区>低量有机肥区>化肥区>对照.土壤C/N基本维持在11～16之间.单施化肥处理土壤微生物碳量降低,Kos值高于其它施化肥处理,有机无机肥配合施用,结合态腐殖质含量明显下降,松结态/重组腐殖质的比值和松/紧比值也有所降低.有机无机配施各处理土壤微生物碳量,以及土壤松结态、稳结态、紧结态腐殖质的含量显著升高,提高松结态/重组腐殖质和松/紧的比值;不同用量的施有机肥处理土壤微生物碳量与对照相比差异不显著,Kos值下降,其他指标均升高.
The result of 23-years fixed position experiment showed that : the content ot soil organic carbon,totol nitrogen,hydrolysalde nitrogen and microbial biomass N varied as the following orders; high OM. > low OM. > chemical fertilizer >control. Soil microbial biomass-C,combined humus , loose-combined humus /humus, loose/tight decreased with the applying of chemical fertilizers. If chemical fertilizers were applied with OM. these indexies increased especially. Effect of OM. on soil microbial biomass-C was not remarkable, but others increased, compared with control.
出处
《土壤通报》
CAS
CSCD
北大核心
2005年第4期474-478,共5页
Chinese Journal of Soil Science
基金
辽宁省自然科学基金(9910100402)
关键词
定位施肥
微生物C
N量
Kos
结合态腐殖质
<Keyword>Fixed position fertilization
Microbial-C,N
Kos
Combined humus
