Plant Soil Environ., 2011, 57(9):441-446 | DOI: 10.17221/5911-PSE
Analysis of various implementations of hop strings during hop production
- Department of Agricultural Machines, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic
Hop purchasers impose still higher requirements on the quality of the final product, which is why hop granules have to be divested of all possible impurities. One of the places that are most at risk from the given point of view is the making of hop strings and the way they are attached to the hop-field supporting structure. Commonly used hop string attachments very often remain on the supporting structure after the harvest, spontaneously loosen in the following years, penetrate into the post-harvest processing stage of the technological procedure and negatively influence the output quality of the hops. The article summarizes the results of field experiments done during the pull-down of hop vines using a common hop string, but with various attachments with the aim of looking for the most suitable treatment which would exclude the risk of impurities penetrating from this stage of the technological procedure into the final product. The measurement carried out shows that so far the most advantageous treatment is hop string with simple attachment formed by twine 12 500. Breakage of hop strings occurred in 93% in twine, while with the rest of the vines only in wire.
Keywords: hop; granule; impurity; growing; processing
Published: September 30, 2011 Show citation
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