稻秸的不同组分对水稻土微生物量碳氮及可溶性有机碳氮的影响  

Effects of Different Ingredients of Rice Straw Incorporation on Soil Microbial Biomass Carbon,Nitrogen and Dissolved Organic Carbon,Nitrogen in Rice Paddy Soil

作　　者：汤宏[1,2] 沈健林[2] 刘杰云[3] 王聪[2] 吴金水[2] 张杨珠[4] 

机构地区：[1]凯里学院环境与生命科学学院,贵州凯里556011 [2]中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙410125 [3]宿州学院环境与测绘工程学院,安徽宿州234100 [4]湖南农业大学资源环境学院,长沙410128

出　　处：《水土保持学报》2017年第4期264-271,共8页Journal of Soil and Water Conservation

基　　金：凯里学院获得博士学位教师(引进教授)专项课题(BS201334);国家自然科学基金青年基金项目(41101247)

摘　　要：为探明稻秸(稻草)及其不同组分(腐解稻秸、可溶性有机物和去活稻秸)对红黄泥水稻土微生物量碳、氮(MBC、MBN)和可溶性有机碳、氮(DOC、DON)含量的影响。通过室内恒温培养试验,研究了长期淹水条件下,添加稻秸及其组分对MBC、MBN、DOC和DON的影响。结果表明,与对照(S处理)相比,添加稻秸(RS+S处理)、腐解稻秸(DRS+S处理)和去活稻秸(NARS+S处理)均提高了MBC,提高幅度分别为11.17%(p<0.01),1.83%和6.25%(p<0.05),添加可溶性有机物(DOM+S处理)处理降低了MBC,降低幅度为2.67%;RS+S处理提高了MBN,提高幅度为15.29%,DRS+S、DOM+S和NARS+S处理均降低了MBN,降低幅度分别为15.19%,3.09%和15.92%。与S处理相比,RS+S、DRS+S、DOM+S和NARS+S处理均极显著提高了红黄泥DOC(p<0.01),提高幅度依次分别为13.33%,10.88%,6.81%和11.41%;RS+S、DRS+S和DOM+S处理均显著提高了红黄泥DON(p<0.05),NARS+S处理极显著提高了红黄泥DON(p<0.01),提高幅度依次分别为6.96%,10.84%,10.12%和13.41%。与S处理相比,DRS+S和NARS+S处理极显著提高了MBC/MBN,RS+S处理显著降低了MBC/MBN,DOM+S处理对MBC/MBN几乎没有影响;各处理对DOC/DON没有显著影响。稻秸及其不同组分对红黄泥水稻土MBC、MBN、DOC和DON含量的影响基本一致,但影响程度存在差异,稻秸和去活稻秸影响较大。结果可为稻秸及其不同组分对MBC、MBN、DOC和DON的影响机理提供基础数据,进一步揭示稻田土壤速效养分的来源与转化关系,为农业生产中秸秆的科学利用和稻田土壤肥力定向培育提供科学依据。This study aimed to analyze the effects of rice straw（rice straw）and its different ingredients（decomposed rice straw,dissolved organic material,non-active ingredient rice straw）on microbial biomass carbon,nitrogen（MBC,MBN）and dissolved organic carbon,nitrogen content（DOC,DON）in the well-drained paddy soil from quaternary red clay.An indoor thermostatic incubation experiment under continuous flooding was carried out.The results showed,compared to the control（S treatment）,rice straw（RS＋S treatment）,decomposed rice straw（DRS＋S treatment）and non-active ingredient rice straw treatment（NARS＋S treatment）increased by 11.17%（P〈0.01）,1.83% and 6.25%（P〈0.05）in MBC,respectively,dissolved organic material treatment decreased by 2.67%in MBC.RS＋S treatment increased by 15.29%in MBN,while DRS＋S,DOM＋S,and NARS＋S decreased by 15.19%,3.09% and 15.92% in MBN,respectively.Compared with S,RS＋S,DRS＋S,DOM＋S and NARS＋S treatments significantly increasedby 13.33%,10.88%,6.81% and 11.41%in DOC,respectively（P〈0.01）;RS＋S,DRS＋S and DOM＋S treatments significantly increased by 6.96%,10.84% and 10.12% in DON,respectively（P〈0.05）;and NARS＋S treatment highly significantly increased by 13.41%in DON（P〈0.01）.Compared with S,DRS＋S and NARS＋S treatments highly significantly increased MBC/MBN（P〈0.01）,while RS＋S treatment significantly decreased the MBC/MBN（P〈0.05）,and DOM＋S treatment almost had no effect on MBC/MBN.Among the treatments,there were no significant differences in DOC/DON.As for MBC,MBN,DOC and DON in the well-drained paddy soil from quaternary red clay,rice straw and its different ingredients work in the same direction,but in different degree.The findings can provide a basic data for understanding the controls of rice straw and its different ingredients on MBC,MBN,DOC and DON,and a scientific basis for revealing the relationship between the source and conversion of available nutrient in paddy soil,which are useful for improving th

关 键 词：稻秸 稻秸组分 水稻土 微生物量碳、氮 可溶性有机碳、氮 

分 类 号：S141.4[农业科学—肥料学] S153.5[农业科学—农业基础科学]