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不同垄沟覆盖管理下连作马铃薯根际土壤真菌多样性分析

Analysis on Fungal Diversity in Rhizosphere Soil of Continuous Cropping Potato Subjected to Different Furrow-Ridge Mulching Managements.

作者信息

Qin Shuhao, Yeboah Stephen, Xu Xuexue, Liu Yuhui, Yu Bin

机构信息

College of Horticulture, Gansu Agricultural UniversityLanzhou, China.

Gansu Key Laboratory of Crop Genetic and Germplasm Enhancement, Gansu Agricultural UniversityLanzhou, China.

出版信息

Front Microbiol. 2017 May 10;8:845. doi: 10.3389/fmicb.2017.00845. eCollection 2017.

Abstract

Knowledge about fungi diversity following different planting patterns could improve our understanding of soil processes and thus help us to develop sustainable management strategies. The objective of this study was to determine the impact of different furrow-ridge mulching techniques on fungal diversity in rhizosphere soil under continuous cropping system. The investigated treatments were: flat plot without mulch (CK); flat plot with mulch (T1); on-ridge planting with full mulch (T2); on-furrow planting with full mulch (T3); on-ridge planting with half mulch (T4); and on-furrow planting with half mulch (T5). NGS (Illumina) methods and ITS1 sequences were used in monitoring fungi diversity of the potato rhizosphere soil. The fungi diversity in the rhizosphere soil was ranked in the order T5 > T2 > T4 > T1 > CK at the early growth stage and T2 > T3 > T1 > T4 > CK at the late growth stage of potato. The fungal communities found in the rhizosphere soil were Ascomycota, Zygomycota, Basidiomycota, Chytridiomycota, and other unidentified fungal communities. Among the fungal community in the rhizosphere soil, Ascomycota was found to be dominant fungi population, with the highest percentage (89%) in the T5 soil whereas the T2 soils had the lowest percentage (67%). The abundance in fully-mulched treated soils was higher than in half-mulched treated soil. The dominant genus in the T4 soil was , whereas lower populations (1-2%) of , , , and were found in that treatment. Among the eumycetes, the dominant fungal class in all treated soils was the Sordariomycetes, which ranged from 57 to 85% in T2 and T5 soils, respectively. The percentages in half-mulched treated soils (T4 and T5) were 55 and 28% lower than that of complete mulched treated soils (T2 and T3), respectively. The cluster analysis results showed that, CK, T4, and T5 treated soils and T1, T2, and T3 treated soils had similarities in microbial compositions, respectively. Potato tuber yield was greater under the on-ridge planting with full mulch (T2) treated soil, followed by on-ridge planting with half-mulch (T4) treated soil. The rhizosphere soil under the on-ridge planting with full-mulch (T2) soil had the highest fungal diversity, suggesting that this management was the best environment for fungi, whereas the on-ridge planting with half-mulch (T4) soil had the minimum abundance of

摘要

了解不同种植模式下的真菌多样性有助于我们更好地理解土壤过程,从而制定可持续的管理策略。本研究旨在确定不同垄沟覆盖技术对连作体系下根际土壤真菌多样性的影响。研究处理包括:无覆盖平作(CK);有覆盖平作(T1);全膜垄作(T2);全膜沟作(T3);半膜垄作(T4);半膜沟作(T5)。采用NGS(Illumina)方法和ITS1序列监测马铃薯根际土壤真菌多样性。马铃薯生长前期,根际土壤真菌多样性排序为T5>T2>T4>T1>CK;生长后期排序为T2>T3>T1>T4>CK。根际土壤中的真菌群落包括子囊菌门、接合菌门、担子菌门、壶菌门和其他未鉴定的真菌群落。在根际土壤真菌群落中,子囊菌门是优势菌群,在T5土壤中占比最高(89%),而在T2土壤中占比最低(67%)。全膜覆盖处理土壤中的真菌丰度高于半膜覆盖处理土壤。T4土壤中的优势属为 ,该处理中 、 、 和 的数量较少(1-2%)。在真真菌中,所有处理土壤中的优势真菌纲为粪壳菌纲,在T2和T5土壤中分别占57%至85%。半膜覆盖处理土壤(T4和T5)中的该纲占比分别比全膜覆盖处理土壤(T2和T3)低55%和28%。聚类分析结果表明,CK、T4和T5处理土壤以及T1、T2和T3处理土壤在微生物组成上分别具有相似性。全膜垄作(T2)处理土壤上的马铃薯块茎产量最高,其次是半膜垄作(T4)处理土壤。全膜垄作(T2)土壤的根际土壤真菌多样性最高,表明这种管理方式对真菌而言是最佳环境,而半膜垄作(T4)土壤中的真菌丰度最低

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/74ea/5423957/4b339f1c6637/fmicb-08-00845-g001.jpg

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