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Type of organic fertilizer rather than organic amendment per se increases abundance of soil biota

Viketoft, Maria and Riggi, Laura and Bommarco, Riccardo and Hallin, Sara and Taylor, Astrid (2021). Type of organic fertilizer rather than organic amendment per se increases abundance of soil biota. PeerJ. 9 , e11204
[Research article]

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Abstract

Addition of organic amendments is a commonly used practice to offset potential loss of soil organic matter from agricultural soils. The aim of the present study was to examine how long-term addition of organic matter affects the abundance of different soil biota across trophic levels and the role that the quality of the organic amendments plays. Here we used a 17-year-old fertilization experiment to investigate soil biota responses to four different organic fertilizers, compared with two mineral nitrogen fertilizers and no fertilization, where the organic fertilizers had similar carbon content but varied in their carbon to nitrogen ratios. We collected soil samples and measured a wide range of organisms belonging to different functional groups and trophic levels of the soil food web. Long-term addition of organic and mineral fertilizers had beneficial effects on the abundances of most soil organisms compared with unfertilized soil, but the responses differed between soil biota. The organic fertilizers generally enhanced bacteria and earthworms. Fungi and nematodes responded positively to certain mineral and organic fertilizers, indicating that multiple factors influenced by the fertilization may affect these heterogeneous groups. Springtails and mites were less affected by fertilization than the other groups, as they were present at relatively high abundances even in the unfertilized treatment. However, soil pH had a great influence on springtail abundance. In summary, the specific fertilizer was more important in determining the numerical and compositional responses of soil biota than whether it was mineral or organic. Overall, biennial organic amendments emerge as insufficient, by themselves, to promote soil organisms in the long run, and would need to be added annually or combined with other practices affecting soil quality, such as no or reduced tillage and other crop rotations, to have a beneficial effect.

Authors/Creators:Viketoft, Maria and Riggi, Laura and Bommarco, Riccardo and Hallin, Sara and Taylor, Astrid
Title:Type of organic fertilizer rather than organic amendment per se increases abundance of soil biota
Series Name/Journal:PeerJ
Year of publishing :2021
Volume:9
Article number:e11204
Number of Pages:22
Publisher:PEERJ INC
ISSN:2167-8359
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 3.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Keywords:Earthworms, Farmyard manure, Hay, Long-term field experiment, Microarthropods, Microorganisms, Nematodes, Sewage sludge, Soil food-web, Household compost
URN:NBN:urn:nbn:se:slu:epsilon-p-112113
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112113
Additional ID:
Type of IDID
DOI10.7717/peerj.11204
Web of Science (WoS)000648463800002
ID Code:24408
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:07 Jun 2021 14:23
Metadata Last Modified:07 Jun 2021 14:31

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