PDF(Pubmed)
Abstract：
UNASSIGNED: Tillage practices can substantially affect soil properties depending on crop stage. The interaction between tillage and crop growth on arbuscular mycorrhizal fungi (AMF) communities remains unclear. We investigated the interactions between four tillage treatments (CT: conventional tillage, RT: reduced tillage, NT: no tillage with mulch, and SS: subsoiling with mulch), maintained for 25 years, and two wheat growth stages (elongation stage and grain filling stage) on AMF diversity and community composition.
UNASSIGNED: The AMF community composition strongly changed during wheat growth, mainly because of changes in the relative abundance of dominant genera Claroideoglomus, Funneliformi, Rhizophagu, Entrophospora, and Glomus. Co-occurrence network analysis revealed that the grain filling stage had a more complex network than the elongation stage. Redundancy analysis results showed that keystone genera respond mainly to changes in soil organic carbon during elongation stage, whereas the total nitrogen content affected the keystone genera during grain filling. Compared with CT, the treatments with mulch, i.e., NT and SS, significantly changed the AMF community composition. The change of AMF communities under different tillage practices depended on wheat biomass and soil nutrients. NT significantly increased the relative abundances of Glomus and Septoglomus, while RT significantly increased the relative abundance of Claroideoglomus.
UNASSIGNED: Our findings indicate that the relative abundance of dominant genera changed during wheat growth stages. Proper tillage practices (e.g., NT and SS) benefit the long-term sustainable development of the Loess Plateau cropping systems.
UNASSIGNED: The AMF community composition strongly changed during wheat growth, mainly because of changes in the relative abundance of dominant genera Claroideoglomus, Funneliformi, Rhizophagu, Entrophospora, and Glomus. Co-occurrence network analysis revealed that the grain filling stage had a more complex network than the elongation stage. Redundancy analysis results showed that keystone genera respond mainly to changes in soil organic carbon during elongation stage, whereas the total nitrogen content affected the keystone genera during grain filling. Compared with CT, the treatments with mulch, i.e., NT and SS, significantly changed the AMF community composition. The change of AMF communities under different tillage practices depended on wheat biomass and soil nutrients. NT significantly increased the relative abundances of Glomus and Septoglomus, while RT significantly increased the relative abundance of Claroideoglomus.
UNASSIGNED: Our findings indicate that the relative abundance of dominant genera changed during wheat growth stages. Proper tillage practices (e.g., NT and SS) benefit the long-term sustainable development of the Loess Plateau cropping systems.
摘要：
■耕作方式可以根据作物阶段对土壤性质产生实质性影响。耕作与作物生长在丛枝菌根真菌（AMF）群落上的相互作用尚不清楚。我们调查了四种耕作处理之间的相互作用(CT：常规耕作，RT：减少耕作，NT：不覆盖耕作，和SS：用覆盖物深松)，维持了25年,和两个小麦生育期(伸长期和籽粒灌浆期)对AMF多样性和群落组成的影响。
■AMF群落组成在小麦生长过程中发生了强烈变化，主要是因为Claroideoglomus显性属的相对丰度的变化，真菌,根瘤菌,Entrophospora,还有Glomus.共现网络分析表明，籽粒灌浆阶段比伸长阶段具有更复杂的网络。冗余分析结果表明，梯形属主要响应伸长期土壤有机碳的变化，而在籽粒灌浆过程中，总氮含量会影响梯形属。与CT相比,用覆盖物治疗，即，NT和SS,显著改变了AMF群落组成。不同耕作方式下AMF群落的变化取决于小麦生物量和土壤养分。NT显着增加了Glomus和Septoglomus的相对丰度，而RT显着增加了Claroideoglomus的相对丰度。
■我们的发现表明，优势属的相对丰度在小麦生育期发生了变化。适当的耕作方式(例如，NT和SS）有利于黄土高原种植系统的长期可持续发展。
■AMF群落组成在小麦生长过程中发生了强烈变化，主要是因为Claroideoglomus显性属的相对丰度的变化，真菌,根瘤菌,Entrophospora,还有Glomus.共现网络分析表明，籽粒灌浆阶段比伸长阶段具有更复杂的网络。冗余分析结果表明，梯形属主要响应伸长期土壤有机碳的变化，而在籽粒灌浆过程中，总氮含量会影响梯形属。与CT相比,用覆盖物治疗，即，NT和SS,显著改变了AMF群落组成。不同耕作方式下AMF群落的变化取决于小麦生物量和土壤养分。NT显着增加了Glomus和Septoglomus的相对丰度，而RT显着增加了Claroideoglomus的相对丰度。
■我们的发现表明，优势属的相对丰度在小麦生育期发生了变化。适当的耕作方式(例如，NT和SS）有利于黄土高原种植系统的长期可持续发展。
