Heavy Metals Contamination in Greenhouse Soils and Vegetables in Guanzhong, China

Liu, Ling; Lu, Jinyin; Zhang, Zhenwen; Hai, Zheng; Gao, Xiaoqing; Zhang, Wei

doi:10.4236/jeas.2014.43009

Cited by 7 publications

(6 citation statements)

References 15 publications

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“…The mean comparison between the two depths indicated that the soil pH at 1–10 cm (5.87) is higher than the soil depth of 10–20 cm (5.55) (Figure 2). The result is in line with the findings of [46,47], whereas the result is different from the findings of [48]. According to the classification of soil pH grade, the pH value of (<5) indicated slightly acidic, (5–6.5) mildly acidic, (6.5–7.5) neutral, (7.5–8.5) mildly alkaline and (>8.5) indicated strongly alkaline [49].…”

Section: Resultssupporting

confidence: 92%

“…The relationships between trace elements and soil properties indicated that soil pH has a weak positive correlation with Fe, Ni, Cu, As, Sb, Cd and Pb, whereas a negative correlation with Cr, Co, Zn and Hg. The same finding was reported by [47], for Cr, As, Hg and Pb from Guangzhou (China). TOC had a negative correlation with Co, As, Sb, Cd and Hg, and a weak correlation with Cr, Fe, Ni, Cu, Zn and Hg.…”

Section: Resultssupporting

confidence: 90%

“…The highest mean was recorded at the soil depth of 1–10 cm (Figure 2). A similar result was reported by [47,50]. Numerous studies indicated that TOC of soil decreases with soil depth [50,51].…”

Section: Resultssupporting

confidence: 88%

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Concentrations, Distribution, Sources and Ecological Risk Assessment of Trace Elements in Soils from Wuhan, Central China

Tadesse

Gereslassie

et al. 2018

IJERPH

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This study aimed to determine the concentration levels, potential sources and ecological risks of eleven trace elements, namely Cr, Fe, Co, Ni, Cu, As, Sb, Cd, Zn, Hg and Pb, in the soil from Huangpi district, Wuhan, Central China. Soil samples were collected from eighteen sites at soil depths of 1–10 and 10–20 cm and analyzed using Inductively Coupled Plasma-Mass Spectrometer ICP-MS (Thermo X SERIES 2, Scientific and Innovative Technology Co. Ltd., Beijing, China). The recorded mean concentration of the elements were in a decreasing order of Fe > Co > Cr > Ni > Pb > Cu > As > Cd > Sb > Zn > Hg. The mean concentration of trace elements, soil pH and total organic carbon (TOC) were higher at a soil depth of 1–10 cm. The obtained mean concentration of Cr, Co, As, Cd, Ni, Cu, Hg and Pb were above the soil background values of Wuhan and Hubei Province. The mean concentration values of Co, Ni and Cd, exceeded the recommended FAO (Food and Agriculture Organization)/ISRIC (International Soil Reference and Information Centre) (2004) and WHO/FAO (2001) values. Pearson’s correlation analysis illustrated that there was a strong and significant correlation between trace elements, whereas, a weak positive and negative correlation between elements and soil properties (pH and TOC). The principal component analysis (PCA) and cluster analysis (CA) result indicated that the concentration of trace elements in Huangpi soil were originated from anthropogenic sources. Potential ecological risk index (RI) of this study revealed that there is a high ecological risk of trace elements in the soil. Enrichment factor (EF) and geo-accumulation index (Igeo) of trace elements for this study indicated that the study area is strongly contaminated with Cd and Co. Generally, the finding of this research showed that Huangpi soil is contaminated.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 90%

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Concentrations, Distribution, Sources and Ecological Risk Assessment of Trace Elements in Soils from Wuhan, Central China

Tadesse

Gereslassie

et al. 2018

IJERPH

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“…Contamination of greenhouse soils by heavy metals as a result of long-term use of fertilizers and pesticides in food crops production becomes more and more intense, resulting in harmful effects on human health through consumption of food crops grown on these soils (Liu et al, 2014). Thus, it is imperative to reduce heavy metal contamination in greenhouse soils, and in order to achieve this goal, legislation of some developed countries has set tolerance limits on heavy-metal additions (fertilizers and biosolids) to soils.…”

Section: Discussionmentioning

confidence: 99%

UPTAKE OF HEAVY METALS BY TOMATO PLANTS (Lycopersicum esculentum Mill.) AND THEIR DISTRIBUTION INSIDE THE PLANT

Murtić¹,

Zahirović²,

Čivić³

et al. 2018

AgricultForest

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The aim of this study was to examine the concentration of total and available forms of heavy metals (Ni, Cr, Cu, Zn, Pb and Mn) in the greenhouse soils as well as the distribution of these metals in the different parts of tomato plants grown on these soils. Atomic Absorption Spectroscopy (AAS) was used to determine heavy metals concentration. The concentration of available forms of all examined heavy metals in the soils and in tomato fruits were low, although the total concentration of hazardous heavy metals Ni and Cr in soils exceeded the maximum permissible values, prescribed by legislative rules in Bosnia and Herzegovina. The reasons for the low uptake of heavy metals by tomato plants are mainly related to the chemical properties of soil which are not favorable for heavy metal availability. In addition, the results of this study also showed that the accumulation of all examined heavy metals especially Cr and Ni were much higher in the roots than in the fruits. The low accumulation of heavy metals in tomato fruits is the result of synergy of different plant defense mechanisms that limiting or reducing heavy metal transport from root to fruits.

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“…The content of soil soluble salt in greenhouse vegetable land in Shanghai reached nearly four times the values in open fields (Li et al, 2011) while the contents of available nitrogen (N) and Olsen-P in Shanxi exceeded 1000 mg/kg and 130 mg/kg, respectively. The ratios of N, P, and K have also become seriously imbalanced in some greenhouse soils in Shanxi (Liu et al, 2014), Beijing (Chen et al, 2004), Liaoning (Meng et al, 2000), and Gansu (Kong et al, 2014;Bai et al, 2015). The large volumes of agrochemicals used in greenhouses have led to soil quality deterioration (Sun et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Investigating the Effects of Greenhouse Vegetable Cultivation on Soil Fertility in Lhasa, Tibetan Plateau

2020

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The area of land utilized for growing vegetables in greenhouses has expanded rapidly on the Tibetan Plateau over recent decades. However, the effects of greenhouses on soil fertility as well as variations in these effects between the plateau and plain remain unclear on the Tibetan Plateau. This study assessed the effects of vegetable greenhouses in the vicinity of Lhasa, using open field soil as a control. A total of 92 plough layer (0−20 cm depth) soil samples including 54 from greenhouses and 38 from open fields were taken, and soil pH, electrical conductivity (EC), total soluble salt (TS), soil organic matter (SOM), total nitrogen (TN), available phosphorus (AP), and available potassium (AK) were measured. The results reveal that, soil pH was lower 1.0 units in greenhouses than that in open field. TS was higher 82% and AP was higher 160% overall. Similarly, SOM and TN were higher 32% and 46%, respectively, while AK changed slightly at a higher 1% rate. Results also show that soil properties varied depending on cultivation time and vegetable types. Overall, pH continuously decreased with cultivation time while other soil fertility indicators reached a maximum value after nine years of cultivation before starting to decrease. The effect of leafy vegetable planting on soil was slight overall, while the impact of fruits on soil was more serious. Compared with changes in plain greenhouse soil fertility measured across the eastern China, the effects of greenhouses on soil in Lhasa remain relatively limited; and the change in the degree of soil fertility was lower and the extreme values of soil fertility occurred later in Lhasa.

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Heavy Metals Contamination in Greenhouse Soils and Vegetables in Guanzhong, China

Cited by 7 publications

References 15 publications

Concentrations, Distribution, Sources and Ecological Risk Assessment of Trace Elements in Soils from Wuhan, Central China

Concentrations, Distribution, Sources and Ecological Risk Assessment of Trace Elements in Soils from Wuhan, Central China

UPTAKE OF HEAVY METALS BY TOMATO PLANTS (Lycopersicum esculentum Mill.) AND THEIR DISTRIBUTION INSIDE THE PLANT

Investigating the Effects of Greenhouse Vegetable Cultivation on Soil Fertility in Lhasa, Tibetan Plateau

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