Influence of Soil Organic Carbon on Greenhouse Gas Emission Potential After Application of Biogas Residues or Cattle Slurry: Results from a Pot Experiment
Influence of Soil Organic Carbon on Greenhouse Gas Emission Potential After Application of Biogas Residues or Cattle Slurry: Results from a Pot Experiment
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DOI：
10.1016/s1002-0160(17)60388-6
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发表时间：
2017-10-01
期刊：
影响因子：
5.7
通讯作者：
Droesler, Matthias
中科院分区：
文献类型：
--
作者：
Heintze, Gawan;Eickenscheidt, Tim;Droesler, Matthias
欧洲联盟能源政策的变化明显促进了沼气生产的扩大。因此，大量营养丰富的残留物被用作有机肥料。通过盆栽试验模拟了能源玉米种植中施用有机肥后温室气体排放增加的高风险状况。我们假设，牛泥浆的应用增强CO2和N2 O通量相比，沼气发酵状态，因为整体较高的碳（C）和氮（N）的输入，和更高水平的CO2和N2 O排放量可以预期通过增加土壤有机碳（SOC）和N含量。以150 kg NH 4 + ha（-1）的比例将沼气发酵液和牛粪掺入具有低、中、高SOC含量的3种土壤类型（Cambisol、Mollie Gleysol和Sapric Histosol，分别称为C-低、C-中、C-高）。温室气体交换（CO2，CH 4，和N2 O）进行了测量，在22天的时间内，使用密闭室技术的5个重复。施用牛粪的CO2和N2 O排放通量显著高于施用沼肥。在CH 4交换方面没有观察到差异，所有处理的CH 4交换接近于零。显著较高的CO2排放量，观察到在C-高相比，其他两种土壤类型，而最高的N2 O排放量，观察到在C-中。因此，这些结果表明了土壤类型适应性施肥在改变土壤物理和环境条件方面的重要性。
A change in the European Union energy policy has markedly promoted the expansion of biogas production. Consequently, large amounts of nutrient-rich residues are being used as organic fertilizers. In this study, a pot experiment was conducted to simulate the high-risk situation of enhanced greenhouse gas (GHG) emissions following organic fertilizer application in energy maize cultivation. We hypothesized that cattle slurry application enhanced CO2 and N2O fluxes compared to biogas digestate because of the overall higher carbon (C) and nitrogen (N) input, and that higher levels of CO2 and N2O emissions could be expected by increasing soil organic C (SOC) and N contents. Biogas digestate and cattle slurry, at a rate of 150 kg NH4+ ha(-1), were incorporated into 3 soil types with low, medium, and high SOC contents (Cambisol, Mollie Gleysol, and Sapric Histosol, termed C-low, C-medium, and C-high, respectively). The GHG exchange (CO2, CH4, and N2O) was measured on 5 replicates over a period of 22 d using the closed chamber technique. The application of cattle slurry resulted in significantly higher CO2 and N2O fluxes compared to the application of biogas digestate. No differences were observed in CH4 exchange, which was close to zero for all treatments. Significantly higher CO2 emissions were observed in C-high compared to the other two soil types, whereas the highest N2O emissions were observed in C-medium. Thus, the results demonstrate the importance of soil type-adapted fertilization with respect to changing soil physical and environmental conditions.