Soil nutrients and heavy metal availability under long-term combined application of swine manure and synthetic fertilizers in acidic paddy soil

Although inorganic and organic manures with high concentrations of heavy metals can lead to accumulation or contamination of heavy metals in soils, there are few reports on the effects of long-term application of swine and green manures on the accumulation of heavy metals in rice grains in paddy soils. A long-term field experiment, which was established in 1990 in paddy soil in Hangzhou, China, was used to investigate the effects of inorganic and organic manures on the availability and accumulation of heavy metals in soil and uptake by rice plant. The results showed that long-term application of nitrogen, phosphorus and potash (NPK) plus green manure or swine manure, and swine manure only increased 202%, 146%, and 100% for total Cd, and 5.5%, 7.6%, and 6.6% for total Cu in rice grains, respectively compared to the control without fertilization. Total Zn in rice grain was significantly increased by 13.9% for the treatment of NPK plus green manure. The accumulation of Cd, Zn, and Cu in rice grains after long-term application of swine and green manures is due to the combined effects of the increased concentrations of total and EDTA extractable Cd, Zn, and Cu in soil and the changes of soil properties. Furthermore, the highest bioconcentration factor for Cd was found in the treatment of NPK plus green manure while for Zn and Cu it was observed in NPK treatment. Thus, it may be concluded that green manure and manure with increased Cd, Zn, and Cu in rice grain results in a potential risk of metal accumulation in paddy soils.

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The heavy metal availability in long-term polluted soils as affected by EDTA and alfalfa meal treatments

Plant Soil and Environment ◽

10.17221/524/2012-pse ◽

2012 ◽

Vol 58 (No. 12) ◽

pp. 551-556 ◽

Cited By ~ 3

Author(s):

G. Mühlbachová ◽

J. Száková ◽

P. Tlustoš

Keyword(s):

Heavy Metal ◽

Ethylenediaminetetraacetic Acid ◽

Arable Soil ◽

Metal Availability ◽

Polluted Soils ◽

Lead Smelter ◽

Grassland Soil ◽

Alfalfa Meal ◽

Medicago Sativa L

A 38-day incubation experiment was carried out in order to evaluate the response of plant-available portions of heavy metals in long-term contaminated arable and grassland soils on addition of ethylenediaminetetraacetic acid (EDTA) and alfalfa (Medicago sativa L.) meal. Soils with different soil management (arable and grassland) from the vicinity of a lead smelter were used in the experiment. Readily available heavy metal fractions of Cd, Pb, Zn and Cu increased in the presence of EDTA at the beginning of experiment. The increase of heavy metal availability was higher in the arable soil with lower content of soil organic carbon than in the grassland soil. Addition of EDTA increased content of K<sub>2</sub>SO<sub>4</sub>-extractable carbon which remained higher throughout the overall time of experiment. During the first part of the experiment, the alfalfa meal addition decreased the available metal concentrations in the EDTA-treated grassland soil whereas no effect of alfalfa meal was observed in EDTA-treated arable soil.  

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The influence of pH and organic matter content in paddy soil on heavy metal availability and their uptake by rice plants

Environmental Pollution ◽

10.1016/j.envpol.2010.09.019 ◽

2011 ◽

Vol 159 (1) ◽

pp. 84-91 ◽

Cited By ~ 530

Author(s):

Fanrong Zeng ◽

Shafaqat Ali ◽

Haitao Zhang ◽

Younan Ouyang ◽

Boyin Qiu ◽

...

Keyword(s):

Heavy Metal ◽

Organic Matter ◽

Paddy Soil ◽

Organic Matter Content ◽

Matter Content ◽

Metal Availability ◽

Rice Plants ◽

Influence Of Ph

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Long-term effects of liquid swine manure land surface application in an apple orchard field on soil bacterial community and heavy metal contents in apple (Malus pumila Mill.)

Environmental Science and Pollution Research ◽

10.1007/s11356-021-14181-1 ◽

2021 ◽

Author(s):

Hongchao Jiao ◽

Qin Yin ◽

Cunhu Fan ◽

Ling Wang ◽

Jingpeng Zhao ◽

...

Keyword(s):

Heavy Metal ◽

Land Surface ◽

Swine Manure ◽

Apple Orchard ◽

Malus Pumila ◽

Long Term Effects ◽

Liquid Swine Manure ◽

Metal Contents ◽

Malus Pumila Mill

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Comparing the Genetic Detox Ability and Heavy Metal Burden in a Cohort of Samples of Egyptian Children and those with Autistic Spectrum Disorder

Journal of Clinical and Medical Research ◽

10.37191/mapsci-2582-4333-1(2)-009 ◽

2019 ◽

Author(s):

Blaurock-Busch E

Keyword(s):

Heavy Metal ◽

Autism Spectrum ◽

Control Group ◽

Potentially Toxic Metals ◽

Gstt1 Null Genotype ◽

Egyptian Children ◽

Glutathione S Transferases ◽

Metal Burden ◽

Detoxification Pathway

The heavy metal burden of patients with Autism spectrum disorders (ASD) has been widely discussed [1-5]. Present knowledge suggests that ASD patients, compared to ‘normal’s’ show a greater metal burden, which may be a cause of the ASD pathogenesis, possibly due to a limited detoxification potential. We thus aimed to evaluate if the metal burden of ASD children is due to comprised detoxification ability, and if missing of enzymes such as the glutathione-S-transferases provide an explanation, or if additional factors play a role. Genetically, we noticed a slight difference in the detoxification ability of the ASD group compared to the Control group. In the ASD group, carrier of the genotype GSTT1 null genotype (i.e. the homozygous loss) are 1.7 times more common as in the Control group and the GSTT1 allele is more frequent in the ASD patient collective. These findings are not statistically significant but indicate a trend. In addition, our data indicates that levels of potentially toxic metals in blood and hair of both groups demonstrate a similar immediate and long-term exposure. However, 36% of the ASD group showed signs of zinc deficiency compared to 11% of the Control group and this points towards inefficiency of the Phase I detoxification pathway. More research is needed to explore the role of other elements in the detoxification pathway.

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