کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5742583 1617764 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shifts in microbial communities with increasing soil fertility across a chronosequence of paddy cultivation in subtropical China
ترجمه فارسی عنوان
تغییر در جوامع میکروبی با افزایش باروری خاک در طول کروموزوم کشت زراعی در چین نیمه گرمسیری
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
An understanding of microbial community assembly and succession are keys to uncovering mechanisms underlying soil fertility development. The dynamics of microbial communities during a paddy soil chronosequence were investigated by phospholipid fatty acid profiling and amplicon high throughput sequencing. The upper 20 cm were sampled from soils after 5, 15, 30 and 100 years of paddy use and from adjacent barren land. Enzyme activities and contents of soil organic carbon, nitrogen and phosphorus of paddy fields strongly increased compared to barren land, and continued to increase at least up to 100 years of paddy cultivation. The increasing soil trophic status favored bacteria over fungi, and fast-growing copiotrophic bacteria gradually replaced slow-growing oligotrophic bacteria. The genus Ignavibacterium with versatile metabolism was identified as an indicator of the bacterial community in year 30 and 100. The variations of bacterial α-diversity tended to stabilize, but species richness continued to increase after 30 years of paddy use. The β-diversity indicated that bacterial community structure in paddy fields differed from that in barren land. The soils of 5 and 15 years of paddy cultivation clustered into one group separated from the group formed from the year 30 and 100. Redundancy analysis indicated that two stoichiometric ratios: C/N and C/P were the major factors affecting microbial community succession. We conclude that long-term paddy cultivation resulted in changes in biochemical properties and variations in trophic pattern of microbial communities, corresponding to increasing soil fertility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soil Ecology - Volume 120, November 2017, Pages 153-159
نویسندگان
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