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首页> 外文期刊>Biomass & bioenergy >Biogas production from catch crops: Increased yield by combined harvest of catch crops and straw and preservation by ensiling
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Biogas production from catch crops: Increased yield by combined harvest of catch crops and straw and preservation by ensiling

机译：捕获作物产生的沼气：通过结合收获捕获作物和秸秆提高产量，并通过青贮保存

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摘要

The combination of catch crop cultivation with its use for biogas production would increase renewable energy production in the form of methane, without interfering with the production of food and fodder crops. The low biomass yield of catch crops has been shown as the main limiting factor for using these crops as co-substrate in biogas plants, since the profit obtained from the sale of methane barely compensates the harvest costs. Therefore, a new agricultural strategy to harvest catch crops together with the residual straw of the main crop was investigated, in order to increase the biomass and the methane yield per hectare. Seven catch crops harvested together with stubble from the previous main crop were evaluated. The effects of stubble height, harvest time and ensiling as a storage method for the different catch crops/straw blends were studied. Biomass yields as TS ranged between 3.2 and 3.6 t ha~(-1) y~(-1) of which the catch crop constituted around 10% of the total biomass yield. Leaving the straw on the field until harvest of the catch crop in the autumn could benefit methane production from the straw both due to increased biomass yield and an increased organic matter bioavailability of the straw taking place on the field during the autumn months. Ensiling as a storage method could be feasible in terms of energy storage and guaranteeing the feedstock availability for the whole year. This new agricultural strategy may be a good alternative for economically feasible supply of catch crops and straw for biogas production.
机译：捕捞作物种植及其用于沼气生产的结合将以甲烷的形式增加可再生能源的生产，而不会影响粮食和饲料作物的生产。捕获农作物的低生物量产量已被证明是将这些作物用作沼气厂的共底物的主要限制因素，因为从甲烷销售中获得的利润几乎无法弥补收获成本。因此，为了增加每公顷的生物量和甲烷产量，研究了一种新的农业策略，该策略将收获的农作物与主要农作物的残留秸秆一起收获。评估了七种收获作物以及先前主要作物的残茬。研究了秸秆高度，收割时间和青贮作为不同收获农作物/稻草混合物的贮藏方法的影响。 TS的生物量产量在3.2至3.6 t ha〜（-1）y〜（-1）之间，其中的农作物占生物量总产量的10％左右。将秸秆留在田间，直到秋天收获的收成作物，都可以从秸秆中生产甲烷，这既得益于生物量的增加和秋季在田间进行秸秆的有机质生物利用度的提高。在能量存储和保证全年的原料可用性方面，将其用作存储方法是可行的。这种新的农业策略可能是经济可行的捕捞作物和秸秆生产沼气的良好选择。

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  • 来源
    《Biomass & bioenergy》 |2015年第8期|3-11|共9页
  • 作者

    Beatriz Molinuevo-Salces; Soren U. Larsen; Birgitte K. Ahring; Hinrich Uellendahl;

  • 作者单位

    Section for Sustainable Biotechnology, Aalborg University Copenhagen, A C Meyers Voenge 15, 2450 Copenhagen, Denmark;

    Agrotech - Institute for Agri Technology and Food Innovation, Agro Food Park 15, DK-8200 Aarhus N, Denmark;

    Section for Sustainable Biotechnology, Aalborg University Copenhagen, A C Meyers Voenge 15, 2450 Copenhagen, Denmark,Center for Bioproducts and Bioenergy, Washington State University, 2710 Crimson Way, Richland, WA 99354, USA;

    Section for Sustainable Biotechnology, Aalborg University Copenhagen, A C Meyers Voenge 15, 2450 Copenhagen, Denmark;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Catch crops; Raphanus sativus var. oleiformis; Lolium perenne; Trifolium sp.; Vicia sativa; Silage;

    机译：收割庄稼;萝卜变种油状黑麦草白三叶野豌豆;青贮饲料;

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