Plant lead (Pb) tolerance and accumulation are key characteristics affecting phytoremediation efficiency. Bermudagrass is an excellent candidate for the remediation of Pb-polluted soil, and it needs to be mowed regularly. Here, we explored the effect of different mowing frequencies on the remediation of Pb-contaminated soil using bermudagrass. Mowing was found to decrease the biomass and photosynthetic efficiency of bermudagrass under Pb stress, thereby inhibiting its growth. Although mowing exacerbated membrane peroxidation, successive mowing treatments alleviated peroxidation damage by regulating enzymatic and nonenzymatic systems. A comprehensive evaluation of Pb tolerance revealed that all the mowing treatments reduced the Pb tolerance of bermudagrass, and a once-per-month mowing frequency had a less negative effect on Pb tolerance than did more frequent mowing. In terms of Pb enrichment, mowing significantly increased the Pb concentration, total Pb accumulation, translocation factor (TF), and bioenrichment factor (BCF) of bermudagrass. The total Pb accumulation was greatest under the once-a-month treatment, while the TF and BCF values were greatest under the three-times-a-month mowing treatment. Additionally, the decrease in soil pH and DOC were significantly correlated with the soil available Pb content and plant Pb accumulation parameters. The results showed that changes in the rhizosphere are crucial factors regulating Pb uptake in bermudagrass during mowing. Overall, once-a-month mowing minimally affects Pb tolerance and maximizes Pb accumulation, making it the optimal mowing frequency for soil Pb remediation by bermudagrass. This study provides a novel approach for the remediation of Pb-contaminated soil with bermudagrass based on mowing.
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http://dx.doi.org/10.1016/j.ecoenv.2024.116904 | DOI Listing |
J Agromedicine
December 2024
Injury Prevention and Community Outreach, University of Iowa Health Care Stead Family Children's Hospital, University of Iowa, Iowa City, IA, USA.
Riding lawnmowers are the most frequent cause of major limb amputation in children in the United States. Our study objective was to investigate the circumstances of child bystander-related riding lawnmower injuries and identify behaviors leading to these events. Followers/members of lawnmower injury-related Facebook pages, who were aware of children that had suffered a lawnmower injury, were invited to complete a survey.
View Article and Find Full Text PDFFood Chem
December 2024
Henan Key Laboratory of Rice Molecular Breeding and High Efficiency Production/ Collaborative Innovation Center of Henan Grain Crops/Henan Center of Crop Genomics and Rice Engineering, Henan Agricultural University, Zhengzhou 450046, China. Electronic address:
Forage-grain ratoon rice (FG-RR) systems, integrating grain and forage production, promise a sustainable approach to enhance food security and livestock development in marginal regions where ratoon rice (T-RR) is traditionally cultivated. Here, we quantified zinc (Zn), copper (Cu), arsenic (As), and cadmium (Cd) concentrations in ratoon crop grains from 23 rice varieties at four mowing stages (heading, milk-ripening, dry-ripening, and full maturity) of the main crop. Early mowing at the milk-ripening stage significantly reduced As levels (16.
View Article and Find Full Text PDFUrban Ecosyst
December 2024
UK Centre for Ecology & Hydrology, Environment Centre Wales, Bangor, LL57 2UW UK.
Ecol Appl
December 2024
Department of Species Interaction Ecology, Helmholtz Centre for Environmental Research GmbH-UFZ, Leipzig, Germany.
Mov Ecol
November 2024
Research Unit Wildlife Biology and Management, Bavarian State Institute of Forestry, Hans-Carl-von-Carlowitz-Platz 1, 85354, Freising, Germany.
Background: Parental care is indispensable for the survival and development of dependent offspring, often requiring a delicate balance of time and energy allocation towards offspring by parents. Among ungulates employing a hider strategy, deciding when and where to provide care while also maintaining a sufficient distance to not reveal the offspring´s hiding place is likely crucial in determining their fate.
Methods: In this study, we analyzed the timing and spatial distribution of mother-offspring interactions in roe deer females (Capreolus capreolus L.
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