Effects of mixed pulp mill sludges on crop yields and quality

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Kinnula , S , Toivonen , M , Soinne , H , Joona , J & Kivela , J 2020 , ' Effects of mixed pulp mill sludges on crop yields and quality ' , Agricultural and Food Science , vol. 29 , no. 4 , pp. 276-286 . https://doi.org/10.23986/afsci.95600

Title: Effects of mixed pulp mill sludges on crop yields and quality
Author: Kinnula, Sari; Toivonen, Marjaana; Soinne, Helena; Joona, Juuso; Kivela, Jukka
Contributor organization: Department of Agricultural Sciences
Helsinki Institute of Sustainability Science (HELSUS)
Faculty of Agriculture and Forestry
Date: 2020
Language: eng
Number of pages: 11
Belongs to series: Agricultural and Food Science
ISSN: 1459-6067
DOI: https://doi.org/10.23986/afsci.95600
URI: http://hdl.handle.net/10138/320774
Abstract: There is a great need for sustainable fertilisers and soil amendments, as current fertilisation practices negatively affect the environment. Pulp mill sludges (PMS) could provide a means to replace fertilisers made using non-renewable resources while adding slowly decomposing organic material to the soil and utilising nutrients from the forest industry. This study tested the effects of composted and lime-stabilised mixed PMS (CPMS and LPMS) on wheat (Triticum aestivum) yields and residual effect on oat (Avena sativa) yields in the boreal region. A two-year field experiment included two CPMS and two LPMS treatments all with additional mineral fertilisation, a mineral fertiliser treatment, and a zero-control treatment. All the fertilisers increased yields. There were no differences in crop yields between CPMS, LPMS and mineral fertiliser treatments. However, some quality characteristics and nitrogen (N) uptake were lower with all or some PMS compared with mineral fertilisation. This result suggests that part of the mineral fertilisation for cereals could be replaced by using PMS, but more information on N mineralisation from sludges is needed.
Subject: primary sludge
secondary sludge
organic fertiliser
soil amendment
recycled fertiliser
nutrient recycling
4111 Agronomy
Peer reviewed: Yes
Rights: CC BY
Usage restriction: openAccess
Self-archived version: publishedVersion

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