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Dehulling and groat/hull content measurement at JKI-ZL Groß Lüsewitz M. Herrmann

Dehulling and groat/hull content measurement at JKI-ZL Groß Lüsewitz M. Herrmann. Equipment:. Feed hopper. Weighing scales with dehulled sample. Compressed air dehuller. Air pressure regulator. Influencing factors for groat/hull content:. Environmental effects: sunny days, latitude

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Dehulling and groat/hull content measurement at JKI-ZL Groß Lüsewitz M. Herrmann

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  1. Dehulling and groat/hull content measurement at JKI-ZL Groß Lüsewitz M. Herrmann

  2. Equipment: Feed hopper Weighing scales with dehulled sample Compressed air dehuller Air pressure regulator

  3. Influencing factors for groat/hull content: • Environmental effects: • sunny days, latitude • Weather conditions • Fertilizer • Pretreatment of seeds and grain moisture content • Genetical factors: Kernel size and shape; „dehulling ability“ • Dehulling methods (manually 200 kernels; compressed air dehuller, impact dehuller)

  4. Influencing factors for hull content: • Dehulling parameters: • Amount of seeds; • Duration of dehulling • Air pressure • Insufficient air pressure or duration results in ineffective dehulling, but excessive stress (higher air pressure and duration) results in groat breakage.

  5. Quality of dehulling (300g-samples: 5min) Bad dehulled sample

  6. Quality of dehulling Slightly better

  7. Dehulling results are strongly influenced by location and genotype: (results from 2008) % hull content

  8. Replications needed for evaluation of hull content(results 2008 with standards Groß Lüsewitz) % hull content of replicated standards

  9. Summary and conclusions • Capacity: Dehulling with compressed air dehuller in JKI-Groß Lüsewitz: 40 samples daily (300g-samples) • Wild oats need to be pretreated (de-awning) - dehulling leads to blockage of the dehuller • Very strong genotypic and location effects on dehulling • There is a wide range of hull content within the AVEQ-set of entries (10-80%hull) • Hull content from one replication is a very rough estimate (about ±6%) • Many samples need to be cleaned by hand because of remaining hulls or undehulled grains before analysis

  10. Many thanks to the sponsors: The European Commission’s ( Council Regulation (EC) no. 870/2004), Peter Koelln KGaA, Emco spol. s r. o., Gemeinschaft zur Förderung der privaten deutschen Pflanzenzüchtung e.V. (GFP) Meeting additionally supported by the Association of the Friends and Promotors of the Julius Kühn-Institute (GFF) and Peter Koelln KGaA

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