%0 Journal Article
%T Seasonal Dynamics of Soil Active Carbon Pool in a Purple Paddy Soil in Southwest China<br>西南地区紫色水稻土活性碳库的季节动态
%A WU Yan
%A JIANG Chang-sheng
%A HAO Qing-ju
%A <br>吴艳
%A 江长胜
%A 郝庆菊
%J 环境科学
%D 2012
%I 
%X The seasonal dynamics of soil organic carbon (SOC), readily oxidized carbon (ROC), dissolved organic carbon (DOC) and microbial biomass carbon (MBC) in a purple paddy soil were studied in a long-term field experimental station in Chongqing, China. The results showed that the seasonal variations of the contents of SOC, ROC and MBC had similar trends in the rape growing season. The contents were much higher in the early and late stages than in the middle stage of the rape growth. SOC, ROC and MBC all achieved the highest values of 16.20 g ·kg-1, 3.58 g ·kg-1 and 309.70 mg ·kg-1 at the end of the growing period, respectively. The seasonal change of DOC content presented as a single peak and reached to the highest value of 37.64 mg ·kg-1 at the middle stage of the rape growth. The temporal dynamics of the allocation ratios of ROC, MBC and DOC were similar to that of their contents. The allocation ratios of ROC, MBC and DOC were 15.49%-23.93%, 1.44%-2.06% and 0.11%-0.32% during the rape growing season, respectively. The influencing factors of SOC and ROC contents were the soil temperature at 5 cm soil depth, soil total nitrogen content and pH. MBC content was jointly impacted by the soil temperature at 5 cm soil depth, root biomass and its C and N contents. DOC content was mainly affected by soil moisture.
%K purple paddy soil
%K soil organic carbon (SOC)
%K active organic carbon
%K allocation ratios
%K seasonal variations<br>紫色水稻土
%K 土壤有机碳
%K 活性有机碳
%K 分配比例
%K 季节变化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=669A8D56CCC2B6A113499F1541148AF8&yid=99E9153A83D4CB11&vid=27746BCEEE58E9DC&iid=5D311CA918CA9A03&sid=A053742F32909086&eid=B28E8FF0A5EC71B0&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=31