水土保持学报2018，Vol.32Issue(1)：204-209,6.DOI:10.13870/j.cnki.stbcxb.2018.01.032
春季解冻过程对2种温带森林土壤微生物量碳氮和可溶性有机碳氮的影响
Effects of Spring Thawing Process on Soil Microbial Biomass Carbon and Nitrogen and Soluble Organic Carbon and Nitrogen in Two Temperate Forests
摘要
Abstract
In order to study the effects of soil freezing and thawing process on carbon and nitrogen turnover in spring,the contents of microbial biomass carbon (MC),microbial biomass nitrogen (MN),soluble organic carbon (DOC) and nitrogen (DON) in two kinds of forest soil in Changbai Mountain area during spring thawing were measured and analyzed through continuous sampling in situ culture.The results showed that:during the soil thawing process,the temporal variations of Mc and MN were different in the two types of soil,moreover the MC and MN showed obvious vertical spatial heterogeneity,and MN content in 0-10 cm soil layer was significantly higher than that in 10-20 cm soil layer.Except for individual periods,Mc content in 0-10 cm soil layer was also significantly higher than that in 10-20 cm soil layer.During thawing process,the DOC content dynamics in 0-10 cm soil layers were basically the same in two types of soil,but the maximum DOC release in 10-20 cm soil layer presented earlier in Korean pine broad-leaved forest than that in Secondary birch forest.The DOC releases of the two forest types were both concentrated in the middle and late stages of thawing.During the thawing period,the temporal dynamic changes of DON in two forest types were consistent,and the maximum DON release occurred in the late stage of thawing.There were obvious vertical spatial distribution characteristics for DON content in two forest types during thawing period,and the content of DON in 0-10 cm soil layer was significantly higher than that in 10-20 cm layer.关键词
森林土壤/解冻期/DOC/DON/微生物量碳/微生物量氮Key words
forest soil/thawing period/DOC/DON/microbial biomass carbon/microbial biomass nitrogen分类
农业科技引用本文复制引用
朱国君,尹航,吴明根,傅民杰..春季解冻过程对2种温带森林土壤微生物量碳氮和可溶性有机碳氮的影响[J].水土保持学报,2018,32(1):204-209,6.基金项目
国家自然科学基金项目(31560202,31160103) （31560202,31160103）
