| 引用本文: | 陶 甄,李中阳,李松旌,等.模拟再生水、养殖废水灌溉对农田温室气体排放的影响[J].灌溉排水学报,2022,41(5):124-131. |
| TAO Zhen,LI Zhongyang,LI Songjing,et al.模拟再生水、养殖废水灌溉对农田温室气体排放的影响[J].灌溉排水学报,2022,41(5):124-131. |
|
| 摘要: |
| 【目的】探究不同水源灌溉对农田温室气体排放的影响，【方法】采用室内培养的方法研究再生水与养殖废水灌溉对土壤CO2、N2O、CH4排放通量的影响(以地下水灌溉为对照)，同时监测土壤pH值、土壤孔隙含水率（WFPS）、NH4+-N、NO3--N的变化，分析培养期间土壤CO2、N2O、CH4排放特征及相关影响因子变化。【结果】与地下水相比，再生水与养殖废水灌溉均显著增加土壤CO2、N2O、CH4排放（P<0.05），再生水促进N2O排放的效果更明显，养殖废水促进CO2、CH4排放的效果更明显；从全球增温潜势（GWP）来看，与地下水相比，再生水与养殖废水均显著增加GWP，二者无显著差异；试验结束时，养殖废水处理土壤pH值低于地下水对照，而再生水处理高于地下水对照；再生水与养殖废水均显著增加了土壤中无机氮量。【结论】综合考虑GWP与土壤性质，在试验条件下，再生水、养殖废水应用于农业灌溉时一定程度上增加了环境温室效应与土壤无机氮量。 |
| 关键词: 灌溉；再生水；养殖废水；温室气体；土壤氮 |
| DOI：10.13522/j.cnki.ggps.2021514 |
| 分类号: |
| 基金项目: |
|
| Greenhouse Gas Emissions from Soils are Affected by Irrigation Water Sources |
|
TAO Zhen, LI Zhongyang, LI Songjing, LI Baogui, LI Siyi, GAO Feng, LIU Yuan
|
|
1.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China;
2. National Research and Observation Station of Shangqiu Agro-ecology System, Shangqiu 476000, China
|
| Abstract: |
| 【Objective】Reducing greenhouse gas (GHG) emissions from soils play an important role in controlling the temperature rise not exceeding 1.5 ℃ by the end of the century. GHG emission is complicated, affected by various physical and biogeochemical processes. In this paper, we studied the impact of irrigation water sources on emissions of CO2, N2O, and CH4 from soils. 【Method】 Incubation experiment was conducted indoors in microcosms. The microcosms were irrigated using reclaimed wastewater, livestock wastewater respectively, with irrigation with fresh groundwater taken as the control. During the experiment, we measured, concurrently, the emissions of CO2, N2O and CH4, the changes in soil pH, water-filled porosity (WFPS), NH4+-N and NO3--N, as well as other edaphic factors. 【Result】 Reclaimed water and livestock wastewater irrigations both significantly increased the emission of CO2, N2O and CH4, compared to irrigation with groundwater (P<0.05). In particular, it was found that reclaimed water irrigation increased N2O emission most, while livestock wastewater irrigation respired more CO2 and CH4 compared to other treatments. In terms of global warming potential (GWP), there was no significant difference in GWP between the reclaimed water irrigation and the livestock wastewater irrigation; however, compared to groundwater irrigation, they both significantly increased GWP (P<0.05). Compared to the control, the livestock wastewater irrigation reduced soil pH, while the reclaimed water irrigation increased soil pH, both at significant levels. Nitrogen in soil irrigated with groundwater was lower than that irrigated by the reclaimed and livestock wastewaters.【Conclusion】In terms of GWP and change in soil properties, reclaimed wastewater and livestock wastewater irrigation increased GHG emissions and enhanced mineral nitrogen in soil. |
| Key words: irrigation; reclaimed water; livestock wastewater; greenhouse gas emission; soil nitrogen |
