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Grassland yield response to knife/tine slurry injection equipment - benefit or crop damage?
RISE, SP – Sveriges Tekniska Forskningsinstitut, JTI Institutet för Jordbruks- och Miljöteknik.ORCID iD: 0000-0002-3333-2162
SLU Swedish University of Agricultural Sciences, Sweden.
2015 (English)In: Grass and Forage Science, ISSN 0142-5242, E-ISSN 1365-2494, Vol. 70, no 2, p. 255-267Article in journal (Refereed) Published
Abstract [en]

Slurry injection into grassland has advantages as it decreases ammonia losses, but may harm grassland plants. In two field experiments, four different types of knife/tine equipment were tested on three different grassland species (monocultures of red clover, perennial ryegrass and red fescue), with or without added mineral nitrogen (N), but without slurry application. During 2 years, in two separate experiments, the injection treatments were applied in spring or in summer to different plots. Crop damage was assessed by a range of methods. It was concluded that both the timing and the design of the knife/injector equipment had a significant influence on yield when used in grassland, with the greatest decrease in yield after spring use. Mean total yield over 2 years (no treatment = 100) for timing and species, with N added, was 94 (vertical knife), 92 (vertical and horizontal knife), 96 (double disc tine) and 94 (tubulator tine). With no N added, the relative yield decrease caused by equipment was less. Red fescue seemed to be a little more sensitive than the other species at spring treatment in one of the 2 years. Leaf area index could be useful for measuring crop damage.

Place, publisher, year, edition, pages
Blackwell Publishing Ltd , 2015. Vol. 70, no 2, p. 255-267
Keywords [en]
Crop damage, N fertilizer, Perennial ryegrass, Red clover, Red fescue, Slurry injection, Yield, Lolium perenne, Trifolium pratense
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-42312DOI: 10.1111/gfs.12106Scopus ID: 2-s2.0-84926522883OAI: oai:DiVA.org:ri-42312DiVA, id: diva2:1380973
Available from: 2019-12-19 Created: 2019-12-19 Last updated: 2019-12-19Bibliographically approved

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Rodhe, Lena

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