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Admixing chaff with straw increased the residues collected without compromising machinery efficiencies
Council for Agricultural Research and Economics, Italy.
Council for Agricultural Research and Economics, Italy.
Council for Agricultural Research and Economics, Italy.
RISE Research Institutes of Sweden, Bioeconomy and Health, Agriculture and Food.ORCID iD: 0009-0006-2669-2959
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2020 (English)In: Energies, E-ISSN 1996-1073, Vol. 13, no 7, article id 1766Article in journal (Refereed) Published
Abstract [en]

The collection of residues from staple crop may contribute to meet EU regulations in renewable energy production without harming soil quality. At a global scale, chaff may have great potential to be used as a bioenergy source. However, chaff is not usually collected, and its loss can consist of up to one-fifth of the residual biomass harvestable. In the present work, a spreader able to manage the chaff (either spreading [SPR] on the soil aside to the straw swath or admixed [ADM] with the straw) at varying threshing conditions (with either 1 or 2 threshing rotors [1R and 2R, respectively] in the combine, which affects the mean length of the straw pieces). The fractions of the biomass available in field (grain, chaff, straw, and stubble) were measured, along with the performances of both grain harvesting and baling operations. Admixing chaff allowed for a slightly higher amount of straw fresh weight baled compared to SPR (+336 kg straw ha−1), but such result was not evident on a dry weight basis. At the one time, admixing chaff reduced the material capacity of the combine by 12.9%. Using 2R compared to 1R strongly reduced the length of the straw pieces, and increased the bale unit weight; however, it reduced the field efficiency of the grain harvesting operations by 11.9%. On average, the straw loss did not vary by the treatments applied and was 44% of the total residues available (computed excluding the stubble). In conclusion, admixing of chaff with straw is an option to increase the residues collected without compromising grain harvesting and straw baling efficiencies; in addition, it can reduce the energy needs for the bale logistics. According to the present data, improving the chaff collection can allow halving the loss of residues. However, further studies are needed to optimise both the chaff and the straw recoveries. © 2020 by the authors.

Place, publisher, year, edition, pages
MDPI AG , 2020. Vol. 13, no 7, article id 1766
Keywords [en]
Bioresource, Cereals, Commodity, Harvest index, Staple foods, Triticum, Wheat, Biomass, Harvesting, Soil quality, Bioenergy sources, Energy needs, EU regulations, Field efficiency, Harvesting operations, Renewable energies, Residual biomass, Threshing rotors, Combines
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-44791DOI: 10.3390/en13071766Scopus ID: 2-s2.0-85083629827OAI: oai:DiVA.org:ri-44791DiVA, id: diva2:1436671
Note

Export Date: 5 May 2020; Article; Funding details: Horizon 2020 Framework Programme, H2020, 727961; Funding text 1: Funding: This research was supported by AGROinLOG project funded by the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 727961 (http://agroinlog-h2020.eu/en/home/).

Available from: 2020-06-08 Created: 2020-06-08 Last updated: 2023-11-22Bibliographically approved

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Gunnarsson, Carina

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