不同经营模式茶园土壤微生物熵对台风干扰的响应  

Response of soil microbial quotient to typhoon disturbance in different management modes of tea plantations

作　　者：梁裕华 曹瑞 王芝慧 李旭清 王怀宾 冯忠娟 董慧慧 安文丽 武启骞 杨万勤 LIANG Yuhua;CAO Rui;WANG Zhihui;LI Xuqing;WANG Huaibin;FENG Zhongjuan;DONG Huihui;AN Wenli;WU Qiqian;YANG Wanqin(College of Forestry and Biotechnology,Zhejiang A&F University,Hangzhou 311300,China;School of Life Sciences,Taizhou University,Taizhou 318000,China)

机构地区：[1]浙江农林大学林业与生物技术学院,杭州311300 [2]台州学院生命科学学院,台州318000

出　　处：《生态学报》2023年第17期7216-7225,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(32201537)。

摘　　要：台风干扰可能显著影响我国东南沿海山地茶园土壤有机碳稳定性和矿化过程,而土壤微生物熵(qMB)是指示土壤有机碳稳定性和矿化潜力的敏感指标。因此,研究不同经营模式茶园土壤微生物熵对台风干扰的响应,可为山地茶园土壤碳库管理提供重要科学依据。为此,以浙江省台州市天台县苍山顶传统化肥经营的纯茶园(M0)、林茶间作(M1)、茶园养鸡(M2)、施用微生物肥料的纯茶园(M3)四种经营模式茶园为研究对象,在2021年7月28日台风"烟花"(第6号台风)来临前一天(T1)、台风过境后一天(T2)和台风过境后7天(T3),按照表层土壤(0-10 cm)和亚表层土壤(10-30 cm)采集四种经营模式的茶园土样,同步测定土壤有机碳(SOC)含量、微生物生物量碳(MBC)和可溶性有机碳(DOC)含量。结果表明:(1)台风干扰对M2和M3的土壤有机碳影响更显著,而且不同经营模式茶园中表层和亚表层的土壤有机碳含量对台风干扰的响应存在差异;(2)台风干扰对M2的土壤微生物熵影响更显著,对表层土壤的微生物熵影响更显著,说明台风干扰对M2土壤有机碳稳定性和矿化影响显著,M2的土壤微生物熵对台风干扰的响应显著;(3)台风干扰对M2的土壤微生物生物量碳影响最显著,对M0和M1的影响最弱,且不同经营模式茶园中不同土层的土壤微生物生物量碳对台风干扰的响应存在差异;(4)台风干扰对M0的土壤可溶性有机碳含量影响更显著,M1和M3次之,对M2的影响最弱。而且不同经营模式茶园中表层和亚表层土壤的可溶性有机碳含量对台风干扰的响应存在差异。综上,台风干扰会对不同经营模式茶园土壤微生物熵影响程度不同,说明台风干扰对不同经营模式茶园土壤有机碳稳定性具有不同程度的影响,其中M2的土壤有机碳是响应台风干扰最敏感的经营模式茶园。Typhoon disturbance might significantly affect the stability and mineralization process of soil organic carbon in mountain tea plantations along the southeast coast of China.Meanwhile,soil microbial quotient(qMB)is a sensitive indicator of soil organic carbon stability and mineralization potential.As a result,understanding on the response of soil microbial quotient in tea plantations with different management modes to typhoon disturbance can provide an important scientific basis for managing soil carbon pools in mountain tea plantations.Therefore,the concentrations of soil organic carbon,dissolved organic carbon and microbial biomass carbon in surface soil(0-10 cm)and subsurface soil(10-30 cm)in four management tea plantation modes,i.e.,traditional tea plantation with chemical fertilizer(M0),tree and tea intercropping plantation(M1),tea plantation with breeding chickens(M2),and traditional tea plantation with microbial fertilizer(M3)in Tiantai County,Zhejiang Province,were measured before one day of Typhoon Fireworks(Typhoon No.6)coming(T1),and after one day(T2)and seven days(T3)of typhoon passing.The results showed that(1)the strongest effects of typhoon disturbance on soil organic carbon in tea plantations were observed in M2 and M3.Moreover,the responses of organic carbon in surface and subsurface soils to disturbance also varied greatly with tea plantation management modes;(2)More significant effects of typhoon disturbance on soil microbial quotient were observed in M2 mode compared with other tea plantation management modes,and the effects of typhoon disturbance on subsurface soil microbial quotient were more significant,suggesting that typhoon disturbance had stronger effect on soil organic carbon stability and mineralization in M2 mode,and the response of soil microbial quotient in M2 mode to typhoon disturbance was more sensitive;(3)The strongest effects of typhoon disturbance on soil microbial biomass carbon were observed in M2 mode,and the weakest effects of those in M0 and M1.Moreover,the responses of

关 键 词：台风干扰 山地茶园 土壤微生物生物量 土壤可溶性有机碳 

分 类 号：S154.3[农业科学—土壤学] S571.1[农业科学—农业基础科学]