不同覆盖处理对菠萝园土壤代谢物和细菌群落结构的影响  

Analysis of Differential Metabolites and Bacterial Community Structure in the Soils of a Pineapple Orchard under Different Mulching Treatments

作　　者：刘传和[1] 贺涵 邵雪花[1] 何秀古 LIU Chuan-he;HE Han;SHAO Xue-hua;HE Xiu-gu(Institute of Fruit Tree Research,Guangdong Academy of Agricultural Sciences/Key Laboratory of South Subtropical Fruit Biology and Genetic Resource,Utilization Ministry of Agriculture and Rural Affairs/Guangdong Provincial Key Laboratory of Science and Technology Research on Fruit Tree,Guangzhou 510640;Guangdong Academy of Agricultural Sciences,Guangzhou 510640)

机构地区：[1]广东省农业科学院果树研究所农业农村部南亚热带果树生物学与遗传资源利用重点实验室广东省果树科学与技术研究重点实验室,广州510640 [2]广东省农业科学院,广州510640

出　　处：《生物技术通报》2024年第7期247-258,共12页Biotechnology Bulletin

基　　金：国家重点研发计划(2023YFD2300800);广东省现代农业产业技术体系创新团队建设专项资金;广东省农村科技特派员项目(KTP20210395);广州市科技计划项目(2023E04J0562);广东省农业科学院菠萝产业研究院项目。

摘　　要：【目的】探测不同覆盖处理对菠萝园土壤微生态环境的影响。【方法】以未覆盖为对照(CK),比较研究了聚乙烯地膜(PM)、无纺布(NW)和可降解地膜(BF)覆盖下菠萝营养生长期土壤理化性状、酶活性以及细菌群落结构、代谢物的差异。【结果】与CK相比,NW土壤中有效磷以及BF土壤中全氮含量显著提高;3种覆盖下土壤的过氧化氢酶和蔗糖酶活性显著降低,但PM土壤的蛋白酶、BF的酸性磷酸酶活性显著提高。与CK相比,PM土壤的放线菌数量减少;NW的细菌数量增多,放线菌减少;BF土壤的真菌和细菌数量增多,放线菌减少。16S测序表明3种覆盖的细菌菌群多样性均低于CK,其中BF的菌群丰度相对最高。与CK相比,PM、NW、BF土壤共筛选到17种显著差异代谢物,主要包括糖类、有机酸、含氮化合物和醇类代谢物,3种覆盖处理中BF土壤的糖类代谢物积累最高。CCA分析表明,pH影响土壤菌群结构发生分异,土壤养分、酶活性与细菌群落结构存在正相关。【结论】3种覆盖处理中NW有利于维持营养生长期菠萝园土壤相对稳定的微生态环境。【Objective】The aim of this work is to investigate the effects of different mulching treatments on the soil microecological environment in pineapple orchard.【Method】Taking the un-mulched soil as the control(CK),the differences in physicochemical properties,microbial abundance,bacterial community structure,and metabolites of the soils of mulching treatments with polyethylene mulch(PM),non-woven fabric(NW)and biodegradable film(BF)were compared and measured,respectively.【Result】Compared with CK,PM significantly increased the activity of protease,whereas,decreased the activities of catalase and sucrase.NW significantly increased the content of available P,and decreased the activities of catalase and sucrase.Similarly,BF significantly increased the contents of total N,available P,and the activity of acid phosphatase,and decreased soil pH and the activities of catalase and sucrase.Compared with CK,PM significantly increased the community of actinomycetes.NW significantly increased the community of bacteria,while decreased the actinomycetes.BF significantly increased the communities of bacteria and fungi,while decreased the actinomycetes.The bacterial 16S high-throughput sequencing profiling suggested that the diversity of CK was higher than those of the three mulching treatments,and the bacteria abundance of BF was the highest among the three treatments and CK.Metabolites analysis indicated that there were 17 differential accumulated metabolites in the soils of three comparison groups with CK,mainly including carbohydrates,acids,nitrogen compounds and alcohols.And BF accumulated the highest sugar metabolites in the three mulching treatments.CCA analysis showed that soil pH affected the differentiation of bacterial community structure,and soil nutrients and enzyme activities were positively correlated with bacterial community structure.【Conclusion】Among the three mulching treatments,NW would benefit to maintain the relatively stable microecological environment of soil during the vegetative growth period

关 键 词：覆盖 菠萝 土壤理化性状 代谢物 细菌群落结构 

分 类 号：S668.3[农业科学—果树学] S154.3[农业科学—园艺学]