Louis Bolk Institute, Kosterijland 3-5, 3981 AJ Bunnik, the Netherlands; Copernicus Institute of Sustainable Development, Utrecht University, Vening Meinesz Building A, Princetonlaan 8a, 3584 CB Utrecht, the Netherlands.
Louis Bolk Institute, Kosterijland 3-5, 3981 AJ Bunnik, the Netherlands.
Sci Total Environ. 2021 Oct 20;792:148161. doi: 10.1016/j.scitotenv.2021.148161. Epub 2021 May 31.
Paludiculture, the cultivation of crops on rewetted peatlands, is often proposed as a viable climate change mitigation option that reduces greenhouse gas emissions (GHGe), while simultaneously providing novel agricultural business options. In West Europe, experiments are ongoing in using the paludicrop cattail (Typha spp.) as feedstock for insulation panel material. Here, we use a Dutch case study to investigate the environmental potential and economic viability of shifting the use of peat soils from grassland (for dairy production) to Typha paludiculture (for cultivation and insulation panel production). Using a life cycle assessment and cost-benefit analysis, we compared the global warming potential (GWP), yearly revenues and calculated Net Present Value (NPV) of 1 ha Dutch peat soil used either for dairy production or for Typha paludiculture. We estimated that changing to Typha paludiculture leads to a GWP reduction of ~32% (16.4 t CO-eq ha), mainly because of lower emissions from peat decomposition as a result of land-use management (-21.6 t CO-eq ha). If biogenic carbon storage is excluded, the avoided impact of conventional insulation material is insufficient to compensate the impact of cultivating and processing Typha (9.7 t CO-eq ha); however, this changes if biogenic carbon storage is included (following PAS2050 guidelines). Typha paludiculture is currently not competitive with dairy production, mainly due to high cultivation costs and low revenues, which are both uncertain, and will likely improve as the system develops. Its NPV is negative, mainly due to high investment costs. This can be improved by introducing carbon credits, with carbon prices for Typha paludiculture (30 years) comparable to EU-ETS prices. In conclusion, Dutch Typha paludiculture has a significant climate change mitigation potential by reducing emissions from deep drained peatlands. Nevertheless, attention is needed to increase its economic viability as this is a key aspect of the system change.
湿地农业，即在回灌的泥炭地上种植作物，通常被认为是一种可行的气候变化缓解选择，它可以减少温室气体排放（GHGe），同时提供新的农业商业选择。在西欧，正在进行利用湿地作物香蒲（Typha spp.）作为绝缘板材料原料的实验。在这里，我们使用荷兰的案例研究来调查将泥炭土的用途从草地（用于奶牛养殖）转变为香蒲湿地农业（用于种植和绝缘板生产）的环境潜力和经济可行性。我们使用生命周期评估和成本效益分析，比较了 1 公顷荷兰泥炭土用于奶牛养殖或香蒲湿地农业的全球变暖潜力（GWP）、年收益和净现值（NPV）。我们估计，转向香蒲湿地农业会导致 GWP 减少约 32%（16.4 吨 CO2-eq 公顷），主要是由于土地利用管理减少了泥炭分解的排放（-21.6 吨 CO2-eq 公顷）。如果排除生物碳储存，避免使用传统绝缘材料的影响不足以补偿种植和加工香蒲的影响（9.7 吨 CO2-eq 公顷）；然而，如果包括生物碳储存（按照 PAS2050 指南），情况就会改变。香蒲湿地农业目前与奶牛养殖相比不具有竞争力，主要是由于高种植成本和低收益，这两个因素都是不确定的，并且随着系统的发展，它们可能会提高。它的 NPV 是负数，主要是由于高投资成本。通过引入碳信用额，可以改善这种情况，香蒲湿地农业的碳价格（30 年）与欧盟排放交易体系的价格相当。总之，荷兰的香蒲湿地农业通过减少深排水泥炭地的排放具有显著的气候变化缓解潜力。然而，需要注意的是，需要提高其经济可行性，因为这是系统变革的关键方面。
