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Greenhouse gas emissions in agricultural cultivated soils using animal waste-based digestates for crop fertilization
The Journal of Agricultural Science ( IF 2 ) Pub Date : 2021-04-22 , DOI: 10.1017/s0021859621000319
Modupe Olufemi Doyeni , Urte Stulpinaite , Ausra Baksinskaite , Skaidre Suproniene , Vita Tilvikiene

Agricultural waste contributes significantly to greenhouse gas (GHG) emissions if not adequately recycled and sustainably managed. A recurring agricultural waste is livestock waste that has consistently served as feedstock for biogas systems. The objective of this study was to assess the use of animal waste digestate to mitigate GHG emissions in agricultural fields. Wheat (Triticum spp. L.) was fertilized with different types of animal waste digestate (organic fertilizers) and synthetic nitrogen fertilizer (inorganic fertilizer). The 170 kg N/ha presented in digestates were split fertilized at an application rate of 90 and 80 kg N/ha. Emissions of GHGs (carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O)) were monitored directly by a static chamber system. The soil and environmental variables were measured to determine their influence on GHG emissions. Emission peaks in N2O and CO2 after the first application of fertilizers with the emissions flattening out over the cultivating season while CH4 emission was negligible with no apparent patterns observed. Results showed individual and cumulative emissions of CO2, CH4 and N2O from the digestates were relatively low and digestate fertilization could be an efficient method for reducing GHGs from agricultural sources in temperate climate conditions.

中文翻译:

使用基于动物粪便的消化物进行作物施肥在农业耕地土壤中的温室气体排放

如果不能充分回收和可持续管理,农业废弃物会显着增加温室气体 (GHG) 排放。经常性的农业废物是一直用作沼气系统原料的牲畜废物。本研究的目的是评估使用动物粪便消化物来减轻农业领域的温室气体排放。小麦 (小麦spp. L.) 用不同类型的动物粪便消化物(有机肥)和合成氮肥(无机肥)施肥。消化物中的 170 kg N/ha 以 90 和 80 kg N/ha 的施用率分开施肥。温室气体排放(二氧化碳(CO2), 甲烷 (CH4) 和一氧化二氮 (N2O)) 由静态室系统直接监测。测量土壤和环境变量以确定它们对温室气体排放的影响。N 中的排放峰值2氧气和一氧化碳2在第一次施肥后,排放量在整个栽培季节趋于平缓,而 CH4发射可以忽略不计,没有观察到明显的模式。结果显示二氧化碳的单独和累积排放2, CH4和 N2来自沼渣的 O 相对较低,沼渣施肥可能是在温带气候条件下减少农业来源温室气体的有效方法。
更新日期:2021-04-22
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