Impact of fertilization with pig slurry on the isotopic composition of nitrate retained in soil and leached to groundwater in agricultural areas

Margalef-Marti, Rosanna; Llovet, Alba; Carrey, Raúl; Ribas, Àngela; Domene, Xavier; Mattana, Stefania; Chin-Pampillo, Juan Salvador; Mondini, Claudio; Alcañiz, Josep M.; Soler, Albert; Otero, Neus

doi:10.1016/j.apgeochem.2020.104832

Cited by 14 publications

(3 citation statements)

References 59 publications

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“…Fertilizer application and subsequent leaching from cropland is reported to have the highest contribution (60%) toward NO 3 leaching into the groundwater. Groundwater contamination by NO 3 is a globally growing problem and more than 80 pounds of nitrogen per acre per year has been estimated leaching into groundwater underneath irrigated lands, usually as NO 3 - (Subbarao et al 2006, Margalef-Marti et al 2021.…”

Section: Discussionmentioning

confidence: 99%

Agricultural practice altering soil microbial diversity and nitrogen functional genes comparing to adjacent native forest soils

Sabula

Milner

et al. 2021

Preprint

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Soil microbial diversity and community are determined by anthropogenic activities and environmental conditions, which greatly affect the functioning of ecosystem. We investigated the soil bacterial diversity, communities, and nitrogen (N) functional genes with different disturbance intensity levels from crop, transition, to forest soils at three locations in the coastal region of Georgia, USA. Illumina high-throughput DNA sequencing based on bacterial 16S rRNA genes were performed for bacterial diversity and community analyses. Nitrifying (AOB amoA) and denitrifying (nirK) functional genes were further detected using quantitative PCR (qPCR) and Denaturing Gradient Gel Electrophoresis (DGGE). Soil bacterial community structure determined by Illumina sequences were significantly different between crop and forest soils (p < 0.01), as well as between crop and transition soils (p = 0.01). However, there is no difference between transition and forest soils. Compared to less disturbed forest, agricultural practice significantly decreased soil bacterial richness and Shannon diversity. Soil pH and nitrate contents together contributed highest for the observed different bacterial communities (Correlations = 0.381). Two OTUs (OTU5, OTU8) belonging to Acidobacteriales species decreased in crop soils, however, agricultural practices significantly increased an OTU (OTU4) of Nitrobacteraceae. The relative abundance of AOB amoA gene was significantly higher in crop soils than in forest and transition soils. Distinct grouping of soil denitrifying bacterial nirK communities was observed and agricultural practices significantly decreased the diversity of nirK gene compared to forest soils. Anthropogenic effects through agricultural practices negatively affecting the soil bacterial diversity, community structure, and N functional genes.

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Section: Discussionmentioning

confidence: 99%

Agricultural practice altering soil microbial diversity and nitrogen functional genes comparing to adjacent native forest soils

Sabula

Milner

et al. 2021

Preprint

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“…The increasing concentrations of nitrates in groundwater resulting from surface leaching of fertilizers, as well as industrial, animal, and human waste, pose health risks when consumed in drinking water, especially for children under five years old [ 25 ]. For example, the leaching of livestock waste from cropland has led to high levels of water pollution in aquifers in Europe, China, India, Reunion Island, and various regions of the USA, Canada, and Australia [ [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] ]. Nitrates and nitrites are also used in processed meats as additives in meat curing [ 34 ] and their intake has been related to breast and prostate cancer risk in humans [ 35 ].…”

Section: Impact Of Nutrient Imbalances On Human Healthmentioning

confidence: 99%

Human-driven global nutrient imbalances increase risks to health

Penuelas,

Sardans

2023

Eco-Environment & Health

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“…NO 3 pollution originates from many sources, including domestic sewage, industrial wastewater, fertilizers and manure from agricultural activities, atmospheric precipitation and soil organic nitrogen 4,9,10 . Different NO 3 sources have unique isotopic signatures; therefore, dual nitrate isotope methods have been widely applied to assess NO 3 sources and reveal the mechanisms of nitrogen transport transformation in surface water and groundwater 11,12 . However, challenges in NO 3 traceability arise from overlapping isotopic signatures and isotopic fractionation during the nitrogen cycle (e.g., nitri cation, denitri cation, ammoni cation, volatilization) 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Tracing groundwater nitrate sources in an intensive agricultural region: Integration of self-organizing map (SOM) and end-member mixing model tool (EMMTE)

Gao,

Wang,

Fan

et al. 2024

Preprint

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The traceability of groundwater nitrate pollution is crucial for controlling and managing polluted groundwater. This study integrates hydrochemistry, nitrate isotope (δ15N-NO3- and δ18O-NO3-), self-organizing map (SOM), and EMMTE models to identify the sources and quantify the contributions of nitrate pollution to groundwater in an intensive agricultural region. The results indicate that the NO3--N concentration in 74% of the groundwater samples exceeded the WHO standard of 10 mg/L. According to the results of EMMTE modeling, soil nitrogen (68.4%) was the main source of nitrate in Cluster-1, followed by manure and sewage (16.5%), chemical fertilizer (11.9%) and atmospheric deposition (3.3%). In Cluster-2, soil nitrogen (60.1%) was the main source of nitrate, with a significant increase in the contribution of manure and sewage (35.5%). The considerable contributions of soil nitrogen may be attributed to the high nitrogen fertilizer usage that accumulated in the soil in this traditional agricultural area. Moreover, it is apparent that most Cluster-2 sampling sites with high contributions of manure and sewage are located around residential land. Therefore, the arbitrary discharge and leaching of domestic sewage may be responsible for these results. This results provide useful assistance for the continuous management and pollution control of groundwater in this area.

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Impact of fertilization with pig slurry on the isotopic composition of nitrate retained in soil and leached to groundwater in agricultural areas

Cited by 14 publications

References 59 publications

Agricultural practice altering soil microbial diversity and nitrogen functional genes comparing to adjacent native forest soils

Agricultural practice altering soil microbial diversity and nitrogen functional genes comparing to adjacent native forest soils

Human-driven global nutrient imbalances increase risks to health

Tracing groundwater nitrate sources in an intensive agricultural region: Integration of self-organizing map (SOM) and end-member mixing model tool (EMMTE)

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