Response of surface GHG fluxes to long-term manure and inorganic fertilizer application in corn and soybean rotation.
Response of surface GHG fluxes to long-term manure and inorganic fertilizer application in corn and soybean rotation.
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DOI：
10.1016/j.scitotenv.2018.01.120
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
E. Ozlu;Sandeep Kumar
中科院分区：
文献类型：
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作者：
E. Ozlu;Sandeep Kumar
本研究旨在研究牛粪和无机肥对玉米（Zea maysL.）土壤表层温室气体（GHG）[CO2、N2O和CH4]排放通量的影响。大豆（Glycine maxL.）旋转试验在粉壤土上进行，设3个有机肥施用量[磷基推荐量（低粪肥，LM），氮基推荐施用量（中肥，MM）和2倍推荐施氮量（高粪肥，HM）]，两种无机肥水平[推荐肥料中肥（MF）和高肥（HF）处理，对照（CK）重复4次。在2015年和2016年的生长季节，每周监测一次土壤温室气体通量。研究数据显示，2015年和2016年施用有机肥和无机肥对CH4年通量没有显著影响。然而，每年的土壤表面CO2通量增加的有机肥处理相比，无机肥处理在这两年。相比之下，2016年，有机肥处理降低了N2O通量，但显著增加了净GWP。一般而言，较高的粪肥和化肥用量导致较高的年度温室气体排放量相比，较低的粪肥和化肥用量在这两年。这项研究的数据表明，作物中的HF应用可能会通过排放更高的温室气体排放而对环境有害，因此，需要探索改善粪肥和肥料管理的应用策略，以避免任何负面的环境影响。
This study was conducted to investigate the impacts of dairy manure and inorganic fertilizer on soil surface greenhouse gases (GHG) [carbon dioxide (CO2), nitrous oxide (N2O) and methane (CH4)] fluxes from soils managed under corn (Zea maysL.)-soybean (Glycine maxL.) rotation. The experiment was established on a silty loam soil, and the treatments included three manure application rates [phosphorus based recommended rate (low manure, LM), nitrogen based recommended rate (medium manure, MM) and two times recommended nitrogen rate (high manure, HM)], two inorganic fertilizer levels [recommended fertilizer (medium fertilizer, MF) and high rate of fertilizer (HF)], and control (CK) replicated four times. Soil GHG fluxes were monitored once a week during the growing season for 2015 and 2016. Data from this study showed that there were not any significant impacts from manure and inorganic fertilizer applications on the annual CH4fluxes in 2015 and 2016. However, annual soil surface CO2fluxes were increased by manure treatments compared to inorganic fertilizer treatments in both the years. In contrast, manure treatments decreased N2O fluxes, but significantly increased net GWP than the fertilizer treatments in 2016. In general, higher manure and fertilizer rates resulted in higher annual GHG emissions compared to lower manure and fertilizer rates in both years. Data from this study showed that HF application in crops can be detrimental for the environment by emitting higher GHG emissions, therefore, improved application strategies for manure and fertilizer management need to be explored to avoid any negative environmental impacts.