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61,005 resultsShowing papers similar to The occurrence of microplastics in farmland and grassland soils in the Qinghai-Tibet plateau: Different land use and mulching time in facility agriculture
ClearOccurrence characteristics and ecological impact of agricultural soil microplastics in the Qinghai Tibetan Plateau, China
Researchers investigated microplastic pollution in agricultural soils on the Qinghai Tibetan Plateau in China, a remote area with low population density. They found microplastic concentrations ranging from about 17 to 950 particles per kilogram, with polyethylene terephthalate, polypropylene, and polyethylene being the most common types. The study suggests that facility-based agriculture significantly increases soil microplastic levels, and nearly half of the areas assessed showed relatively high polymer risk.
Pollution and Distribution of Microplastics in Grassland Soils of Qinghai–Tibet Plateau, China
Researchers collected and analyzed 22 grassland soil samples from the Qinghai-Tibet Plateau and found microplastics present in every sample, with an average abundance of 1,202 particles per kilogram. Polyethylene terephthalate was the dominant polymer type, and most particles were in the 10-50 micrometer size range. The findings demonstrate that microplastic contamination reaches even remote, high-altitude grassland environments far from major population centers.
The occurrence and effect of altitude on microplastics distribution in agricultural soils of Qinghai Province, northwest China
Microplastic distribution was investigated in agricultural soils of Qinghai Province at different altitudes, finding that altitude influenced microplastic characteristics and abundance, with lower-altitude agricultural areas showing higher contamination from plastic film use.
Land-use patterns determine the distribution of soil microplastics in typical agricultural areas on the eastern Qinghai-Tibetan Plateau
Researchers found that land-use patterns strongly determine microplastic distribution in agricultural soils on the eastern Qinghai-Tibetan Plateau, with facility agriculture and farmland soils containing significantly higher microplastic abundance than grassland and orchard soils.
Analysis of microplastics in soils on the high-altitude area of the Tibetan Plateau: Multiple environmental factors
Researchers analyzed microplastic contamination in soils across different land use types on the high-altitude Tibetan Plateau, a remote and sparsely populated region. The study found that microplastic abundance varied with land use, altitude, meteorological conditions, and distance from roads, with greenhouse soils showing the highest concentrations, indicating that even remote high-altitude environments are not free from microplastic pollution.
Microplastics in arid soils: Impact of different cropping systems (Altay, Xinjiang)
Researchers investigated microplastic contamination in farmland soils in an arid region of China, finding extremely high concentrations averaging over 52,000 particles per kilogram of soil. Polyethylene from plastic mulch film accounted for over 90% of the microplastics, with fields growing tall crops like sunflower and maize showing more contamination than potato fields. The study demonstrates that agricultural plastic mulch use is a major source of soil microplastic pollution, particularly in arid farming regions.
An integrated evaluation of potentially toxic elements and microplastics in the highland soils of the northeastern Qinghai-Tibetan Plateau
Researchers conducted the first integrated assessment of toxic elements and microplastics in grassland and farmland soils on the northeastern Qinghai-Tibetan Plateau. They found microplastic abundances ranging from 200 to over 3,600 particles per kilogram, with polypropylene dominating in grasslands and polyethylene in farmlands. The study reveals that even remote highland ecosystems on the Tibetan Plateau are not immune to microplastic contamination.
Microplastic characteristic in the soil across the Tibetan Plateau
Researchers systematically investigated microplastic pollution across the Tibetan Plateau, finding widespread contamination averaging 47 items per kilogram of soil, with fibers predominating and concentrations influenced by proximity to human activities.
Occurrence status of microplastics in main agricultural areas of Xinjiang Uygur Autonomous Region, China
Agricultural soils in Xinjiang, China, were surveyed for microplastic contamination, revealing widespread presence in major farming regions where plastic mulch films and irrigation systems are heavily used. The study provides one of the first regional-scale assessments of microplastic pollution in this important agricultural area.
The distribution of microplastics in soil aggregate fractions in southwestern China
Researchers investigated microplastic distribution across different soil types in agricultural and forested areas near a lake in southwestern China and found plastic particles in every sample, with concentrations as high as 42,960 particles per kilogram. Approximately 95% of the particles fell within the microplastic size range, and fibers were the dominant form, likely originating from textiles and agricultural materials. The study demonstrates that microplastic contamination in soils is extensive and varies with land use practices.
The characteristics and influencing factors of farmland soil microplastic in Hetao Irrigation District, China
Researchers surveyed microplastic contamination in farmland soil across a major grain-producing region in China, finding concentrations ranging from about 1,800 to over 86,000 particles per kilogram. Polyethylene film fragments from agricultural plastic mulch were the dominant type, and 90% of the particles were smaller than 180 micrometers. The study shows that farming practices are introducing large amounts of microplastics into the soil where food crops are grown, raising questions about potential transfer into the food supply.
Occurrence characteristics and risk assessment of microplastics in agricultural soils in the loess hilly gully area of Yan' an, China
Researchers measured microplastic levels in agricultural soil, water, and fertilizer in a farming region of central China and found an average of about 4,500 particles per kilogram of soil. Over 90% of the particles were smaller than 100 micrometers, and the main types were polyethylene and PET from sources like plastic mulch and compost. The findings show that farming practices are introducing significant microplastic contamination into the soil where food is grown.
Distinct microplastic distributions in soils of different land-use types: A case study of Chinese farmlands
Microplastic distribution across six types of farmland land use was surveyed from soils in five Chinese provinces to determine how agricultural practices shape soil microplastic contamination. The study found that microplastic abundance varied significantly by land-use type, with plastic mulch film use and irrigation practices as key contributing factors.
Significant influence of land use types and anthropogenic activities on the distribution of microplastics in soil: A case from a typical mining-agricultural city
Scientists surveyed microplastic pollution across five types of land in a Chinese mining-agricultural city and found the highest levels in greenhouse farmland, with nearly 3,738 particles per kilogram of soil. Agricultural plastic waste, irrigation water, and fertilizers were identified as the main sources of contamination. The study shows that farming practices are major contributors to microplastic buildup in the soil that produces our food.
Abundance and characteristics of microplastics in soils with different agricultural practices: Importance of sources with internal origin and environmental fate
Microplastic abundance and characteristics were examined in soils representing four agricultural practice types in Chinese farmland to evaluate the influence of land use on plastic particle accumulation. Microplastic concentrations and polymer types varied by agricultural practice, with plastic mulch film use and irrigation water source as key drivers of farmland soil contamination.
Distribution characteristics of microplastics in soil of Loess Plateau in northwest China and their relationship with land use type
Researchers measured microplastic levels across different land use types on China's Loess Plateau and found an average abundance of nearly 3,000 particles per kilogram of soil. Construction land and cultivated areas had the highest concentrations, while grassland and woodland had lower levels. The study demonstrates that human land use patterns directly influence how much microplastic accumulates in soil across this important agricultural region.
[Distribution and Influencing Factors of Microplastics in Cultivated Soil in Northeastern Qinghai-Xizang Plateau].
Researchers analysed 95 cultivated soil samples from the northeastern Qinghai-Xizang Plateau using density separation, metallographic microscopy, and Fourier transform infrared spectroscopy, finding microplastic abundances ranging from 68 to 3,668 particles per kilogram in surface soils.
The occurrence and distribution characteristics of microplastics in the agricultural soils of Shaanxi Province, in north-western China
Researchers surveyed microplastic abundance and polymer types in agricultural soils across multiple counties in Shaanxi Province, northwestern China, finding widespread contamination correlated with agricultural activity intensity and plastic mulch film use.
Abundance, spatial distribution, and characteristics of microplastics in agricultural soils and their relationship with contributing factors
Researchers found microplastic concentrations of 2,800 to 82,500 particles per kilogram in agricultural soils of Hainan Island, China, with plastic mulching, farming practices, and environmental factors all contributing to spatial variation in contamination levels.
Microplastic Accumulation in Agricultural Soils with Different Mulching Histories in Xinjiang, China
Researchers found that microplastic accumulation in agricultural soils of Xinjiang, China increases significantly with mulching history, with fields mulched for over 20 years containing substantially more microplastics across all soil layers.
Agricultural plastic mulching as a source of microplastics in the terrestrial environment
Researchers analyzed 384 soil samples from 19 Chinese provinces and found that macroplastic fragments were concentrated in agricultural fields with plastic mulch film use, providing large-scale field evidence linking agricultural mulching to terrestrial plastic contamination.
Characteristics and Risk Assessment of Microplastics in Farmland Soil in Kashgar, Xinjiang
Researchers sampled farmland soils in Kashgar, China, and found microplastics in all tested fields, with film-like and fibrous shapes dominating and polyethylene being the most common plastic type. Cotton fields and greenhouses showed moderate pollution levels, raising concerns about microplastic accumulation in agricultural soils and its potential effects on food production.
Potential sources and occurrence of macro-plastics and microplastics pollution in farmland soils: A typical case of China
This study provides the first comprehensive survey of plastic pollution in Chinese farmland soil, analyzing data from 163 publications covering 728 sites. The average microplastic abundance was 4,537 particles per kilogram of dry soil, with agricultural plastic films and organic waste being the biggest sources. Since China is the world's largest user of agricultural plastics, these findings highlight how farming practices can lead to significant microplastic contamination of the soil that grows our food.
Exploring the Occurrence Characteristics of Microplastics in Typical Maize Farmland Soils With Long-Term Plastic Film Mulching in Northern China
A survey of 225 soil samples from maize farmland with long-term plastic film mulching in northern China found widespread microplastic contamination, with abundance, distribution, and polymer composition reflecting the history of film use and agricultural management practices.