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Spatiotemporal distribution,environmental risk and carbon emission reduction potential of livestock manure in Shaanxi province,China

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 381-396页

作者： Mengyuan QIAO Jianchun ZHU Ronghua LI Junting pAn Ran XIAO Hailong WAnG Kuok Ho Daniel TAnG Zengqiang ZHAnG College of Humanities&Social Development Northwest A&F UniversityYangling 712100China College of natural Resources and Environment Northwest A&F UniversityKey Laboratory of Low-carbon Green Agriculture in Northwestern ChinaMinistry of Agriculture and Rural AffairsYangling 712100China Key Laboratory of non-point Source pollution of Ministry of Agricultural and Rural Affairs Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin College of Resources and EnvironmentSouthwest UniversityChongqing 400715China Biochar Engineering Technology Research Center of Guangdong province School of Environmental and Chemical EngineeringFoshan UniversityGuangdong 528000China Department of Environmental Science University of ArizonaTucsonAZ 85721USA

Shaanxi is a leading province in animal husbandry(AH)in ***,the lack of provincial information on the characteristics and utilization potential of livestock manure(LM)hinders crucial management ***,we investigated the spatiotemporal distribution,availability and biogas potential of LM in Shaanxi,and examine the carbon emission reduction potential of *** has been a 1.26-fold increase in LM quantities in Shaanxi over the past 35 years,reaching 4635.6×10^(4)t by *** was mainly concentrated in northern Shaanxi and the eastern part of *** and pig manure were the primary sources of LM,with the average LM land-load of 14.57 t·ha^(−1)in *** the overall AH in Shaanxi has not exceeded the environmental capacity,the actual scales of AH in Ankang and Hanzhong have already surpassed the respective environmental capacities,posing a higher risk of n and p *** 2021,the estimated biogas energy potential of LM was 1.2×10^(11)*** 2012 to 2021,the average carbon emission reduction potential in Shaanxi was 22%,with an average potential scale of 10%.The results of this research provide valuable data and policy recommendations for promoting the intensive use of LM and reducing carbon emissions in Shaanxi.

关键词： Livestock manure emission estimation n and p loads biogas potential carbon emission reduction

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novel sediment source fingerprinting quantifying erosion-induced total nitrogen and total phosphorus outputs from an intensive agricultural catchment,north China

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International Soil and Water Conservation Research 2023年第3期11卷 494-506页

作者： Hanqing Yu Joseph Adu-Gyamfi Suarau Odutola Oshunsanya Adrian Chappell Wenxiang Liu Yu Zheng Tingting Xue Lee Heng Agricultural Clean Watershed Research Group Institute of Environment and Sustainable Development in AgricultureChinese Academy of Agricultural Sciences(CAAS)Haidian District100081BeijingChina International Atomic Energy Agency ViennaAustria Department of Agronomy University of IbadanNigeria School of Earth and Environmental Sciences Cardif UniversityCardifUK Chongqing Branch Institute Changjiang River Scientific Research InstituteChongqing400026China

Intensive farming is a primary cause of increased sediment and associated nitrogen(n)and phosphorus(p)loads in surface water *** their contributing sources,pathways and loads present major challenges in the high-intensity agricultural ***,we quantify the sediment sources and magnitude of sediment total n and total p from different sources using a novel application of compound-specific stable isotope(CSSI)and fallout radionuclides(FRns)of^(137)cs and^(210)pbex in an intensive agricultural catchment in north *** sources from surface and sub-surface soils were estimated from FRns fingerprint and accounted for 62±7%and 38±7%respectively,while surface soil from land uses that originated from hillslope were identified by CssI *** a novel application of FRns and CSSI sediment fingerprinting techniques,the dominant sediment source was derived from maize farmland(44±0.1%),followed by channel bank(38±7%).The sedimentation rate(13.55±0.30 t ha^(-1)yr^(-1))was quantifed by the^(137)cs cores(0-60 cm)at the outlet of this *** total n and total p in sediment were both mostly derived from maize farmland and least from channel *** channel banks are significant sediment sources but contribute little to the input of sediment n and p for *** implies that chemically-applied farmlands are the main hotspots for catchment erosion control and pollution *** novel application of FRns and CSSI techniques cost-effectively quantified sediment n and p loads from different sources with a single visit to the catchment,enabling rapid assessment for optimizing soil conservation strategies and land management practices.

关键词： Sediment sources Land use n and p loads Compound-specific stable isotope Falloutradionuclides

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