Microbial community structure is affected by cropping sequences and poultry litter under long-term no-tillage

Metadata Updated: December 15, 2019

Soil microorganisms play essential roles in soil organic matter dynamics and nutrient cycling in agroecosystems and have been used as soil quality indicators. The response of soil microbial communities to land management is complex and the long-term impacts of cropping systems on soil microbes is largely unknown. Therefore, changes in soil bacterial community composition were assessed in response to cropping sequences and bio-covers at long-term no-tillage sites. Main effects of four different cropping sequences of corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean (Glycine max L.) were rotated in four year phases for 12-yrs at two Tennessee Research and Education Centers in a randomized complete block design with split-block treatments of four winter bio-covers: hairy vetch (Vicia villosa L.), wheat (Triticum aestivum L.), poultry litter, and a fallow control. Using Illumina high-throughput sequencing of 16S rRNA genes, bacterial community composition was determined. Composition, diversity, and relative abundance of specific taxa were correlated per cropping system, bio-cover, and their interaction. We found that i) richness and diversity varied temporally and spatially, coinciding with soil carbon, pH, nutrient levels, and climatic variability; ii) community composition varied by cropping system, with continuous corn, soybean, and the corn-soybean rotation presenting a hybrid of the continuous corn and soybean communities; however, continuous cotton resulted in the most varied assemblage; iii) bio-covers asserted the greatest influence on microbial communities; specifically poultry litter treatments differed from cover crops (all of which received inorganic-N). Consequently, microbial diversity was greatest under nutrient rich bio-covers (poultry litter) and high residue producing, less pesticide-intensive cropping sequences (soybean and corn compared to cotton), suggesting a more dynamic soil ecology under these no-till cropping systems. This suggests that nutrient management (inorganic fertilizers vs. animal manure) and greater crop rotations (within 4-yr phases) may directly drive phylogenetic community structure and subsequent ecosystem services across agricultural landscapes.

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Public: This dataset is intended for public access and use. License: Creative Commons CCZero

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Dates

Metadata Created Date August 7, 2019
Metadata Updated Date December 15, 2019

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date August 7, 2019
Metadata Updated Date December 15, 2019
Publisher Agricultural Research Service
Unique Identifier e36c17e2-fe37-4e86-9f6e-f31f6f9f2924
Maintainer
Ashworth, Amanda
Maintainer Email
Public Access Level public
Bureau Code 005:18
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Data Dictionary https://data.nal.usda.gov/dataset/microbial-community-structure-affected-cropping-sequences-and-poultry-litter-under-long-term-no-tillage/resource/6e748df1-3c91-4ba8-ace9-2f0888b57970
Harvest Object Id 112daacc-c6d6-49ac-a82d-a3704bff388e
Harvest Source Id 50ca39af-9ddb-466d-8cf3-84d67a204346
Harvest Source Title USDA JSON
License https://creativecommons.org/publicdomain/zero/1.0/
Data Last Modified 2019-08-23
Program Code 005:040
Source Datajson Identifier True
Source Hash b0278c3277cfc208990a501bc9d905d756867767
Source Schema Version 1.1

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