水土保持学报2017，Vol.31Issue(4)：264-271,8.DOI:10.13870/j.cnki.stbcxb.2017.04.042
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
摘要
Abstract
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 increased by 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 the use efficiency of rice straw and soil fertility.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Key words
rice straw/rice straw ingredient/paddy soil/microbial biomass carbon and nitrogen/dissolved organic carbon and nitrogen分类
农业科技引用本文复制引用
汤宏,沈健林,刘杰云,王聪,吴金水,张杨珠..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[J].水土保持学报,2017,31(4):264-271,8.基金项目
凯里学院获得博士学位教师(引进教授)专项课题(BS201334) （引进教授）
国家自然科学基金青年基金项目(41101247) （41101247）
