鄱阳湖南矶山湿地不同植被类型对土壤碳组分、羧化酶及cbbl基因的影响

发布时间：2018-05-09 13:41

本文选题：鄱阳湖 + 碳库　；参考：《土壤学报》2017年05期

【摘要】：选取鄱阳湖南矶山湿地南荻群落(ND)、芦苇苔草混合群落(HH)、苔草群落(TC)、茭白群落(JB)及裸滩地(LT)土壤为研究对象,分析土壤中不同碳组分、固碳酶(1,5-二磷酸核酮糖羧化酶/加氧酶(RubisCO)酶活及其大亚基编码基因(cbbl)及环境因子对它们的影响。结果表明:土壤中全碳(TC)、有机碳(SOC)、微生物生物量碳(MBC)和可溶性有机碳(DOC)依次为6 380~33 830、1 209~2 259、124.6~1 282、2.848~18.00 mg kg~(-1),其平均值变化表现为NDHHTCJB;土壤中RubisCO酶活性在38.08~125.1 nmol CO_2 kg~(-1) min~(-1)之间,ND土壤RubisCO酶活性最高(125.1 nmol CO_2 kg~(-1) min~(-1)),TC最低(38.08 nmol CO_2 kg~(-1) min~(-1));HH与JB的RubisCO酶活性分别为38.85、66.05 nmol CO_2 kg~(-1) min~(-1)。土壤cbbl基因总拷贝数在36.07×10~4~195.6×10~4 copies g~(-1)之间,ND最高,JB最低。相关性分析表明,MBC和DOC与cbbl基因均呈极显著正相关(p0.01),而TC、SOC分别与RubisCO酶活性呈显著正相关关系(p0.05)。本研究结果说明,固碳酶及cbbl基因与各碳组分具有密切的关系,这对于进一步揭示鄱阳湖湿地土壤碳素循环及其微生物机制具有重要的参考意义。
[Abstract]:In this paper, the soil samples of Nangji Mountain Wetland in Poyang Lake were selected to analyze the different carbon components in the soil, such as NDN, HHN, TCU, JB, JB) and LTB in the bare beach land, and the mixed community of Reed and moss grass were selected as the research objects. The activities of carbon-sequestrase 1 ~ (1) -ribonose diphosphate carboxylase / oxygenase (RubisCOase) and its large subunit coding gene, cbbl), and the effects of environmental factors on them were studied. The results showed that the total carbon (TCN), organic carbon (SOC), microbial biomass (MBCs) and soluble organic carbon (RubisCO) in soil were 6380 ~ (33) 830 ~ (-1) ~ 1 209N ~ (2 259124.6) ~ 1 282C ~ (2.848) ~ 18.00 mg 路kg ~ (-1) C ~ (-1) respectively, and the RubisCO enzyme activity in soil was between 38.08 ~ 125.1 nmol CO_2 路kg ~ (-1) 路min ~ (-1) 路min ~ (-1). The highest activity of RubisCO (125.1 nmol CO_2 / kg ~ (-1) Tc was 38.08 nmol CO_2 / kg ~ (-1) and the RubisCO activity of HH and JB were 38.85 nmol CO_2 / kg ~ (-1) and 66.05 nmol CO_2 / kg ~ (-1) 路min ~ (-1), respectively, and the activities of RubisCO were 38.08 nmol CO_2 / kg ~ (-1) and 66.05 nmol CO_2 / kg ~ (-1) 路min ~ (-1), respectively. The total copy number of cbbl gene in soil was between 36.07 脳 10 ~ (4) and 195.6 脳 10 ~ (4) copies / g ~ (-1). Correlation analysis showed that both MBC, DOC and cbbl genes were positively correlated with p0.01a, while TCC-SOC was positively correlated with RubisCO activity respectively (p0.05). The results show that carbon sequestration enzyme and cbbl gene are closely related to each carbon component, which is important for revealing the soil carbon cycling and its microbial mechanism in Poyang Lake wetland.
【作者单位】：江西师范大学生命科学学院江西省亚热带植物资源保护与利用重点实验室;江西科技师范大学生命科学学院江西省生物加工过程重点实验室;
【基金】：国家自然科学基金项目(31460147,41461042) 江西省青年科学家基金项目(20142BCB23010) 江西省教育厅项目(GJJ160314)共同资助~~
【分类号】：S151.9

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