Vertical Distribution of Copper in Copper-Contaminated Coffee Fields in Kilimanjaro, Tanzania

Senkondo, Yasin Hassan; Semu, Ernest

doi:10.1080/00103624.2015.1019085

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…Furthermore, observations indicated that Cu values were significantly lower than 60.00 mg kg −1 . Any concentration of Cu above 60.00 mg kg −1 is considered to be toxic and detrimental to plant growth and productivity (Senkondo et al, 2015).…”

Section: Available Copper (Cu)mentioning

confidence: 99%

Comparative assessment of selected micronutrients under three different land use systems in Odighi, Edo State, Nigeria

Orobator¹,

Ekpenkhio²,

Ugwa³

2023

Agro-Sci.

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This study carried out a comparative assessment of selected micronutrients under mixed tree plantation, cassava and secondary forest land use systems in Odighi, Edo State, Nigeria. The objectives of the study were to determine the concentrations of selected micronutrients under each of the three land use systems; evaluate the distribution of these micronutrients among the three land use systems; and examine the impact of the three land use systems on the selected micronutrients. Using transect sampling design, 18 soil samples were collected from each of the three land use systems giving a total of 54 soil samples for the study. The cassava land use was 7-10-year-old, mixed tree plantation was 10-15-year-old, while secondary forest was 25-year-old and above. Results showed that the concentrations of the selected soil micronutrients (iron, copper, manganese, and zinc) increased with increasing soil depth in all the examined sites except for manganese under cassava land use. The status of iron and zinc were rated excess while copper and manganese were rated optimum for crop production. The study observed significant (p < 0.05) variations for iron and manganese contents across the examined land uses and concluded that the direction and magnitude of changes in the status of micronutrients were a reflection of long-term impact of the different land uses and soil management measures. Liming of the soil and limited use of nitrogen-containing fertilizers are recommended to ameliorate zinc toxicity in the study area. Also, farmers in collaboration with agriculture extension workers should regulate the usage of organic and inorganic fertilizers as soil treatments to avoid excessive concentrations of iron and zinc in the study area.

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Section: Available Copper (Cu)mentioning

confidence: 99%

Comparative assessment of selected micronutrients under three different land use systems in Odighi, Edo State, Nigeria

Orobator¹,

Ekpenkhio²,

Ugwa³

2023

Agro-Sci.

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“…However, there are reports in the literature that an intensive use of Cu in agricultural practices can lead to soil contamination. For example, the use of Cu-based fungicides has led to an excessive accumulation of Cu in soils in Australian [5] and French vineyards [6], coffee fields in Tanzania [7], and apple orchards in Taiwan [8]. Similarly, using soil fertilization of wheat with Cu for 17 years in Shaanxi Province, China significantly increased its concentration in the top layer of the soil [9].…”

Section: Introductionmentioning

confidence: 99%

“…Many authors describe the mobility and vertical distribution of heavy metals, including Cu, in soils fertilized with sediment sewage sludge [20][21][22] contaminated by industry [23][24][25] or as a result of the use of Cu-based fungicides [5,[7][8]. There is no information about the transport of Cu into the soil profile when applied in the form of fertilizers -especially in relation to the dose.…”

Section: Introductionmentioning

confidence: 99%

Fate of Copper in Soils from Different Fertilizer Doses in Relation to Environmental Risk Assessment

Stanislawska-Glubiak¹,

Korzeniowska²

2018

Pol. J. Environ. Stud.

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Total copper distribution in the soil profile was determined, depending on the type of soil and Cu dose, 5 years after the application of this element. Soil samples were taken from 5 layers to 50 cm depth from microplots filled with 3 types of soil that 5 years earlier had been treated with 5 doses of Cu: 4, 8, 12, and 16 kg ha-1. There was an uneven distribution of Cu in the soil profile. In general the Cu decreased in the subsurface layers (10-30 cm) and increased in deeper layers (30-50 cm) in relation to the surface layer (0-10 cm). Using PCA analysis, both soils and doses of similar Cu distribution in the soil profile were pointed out. The distribution pattern in the sandy soil differed from the other two sandy loam soils. Additionally, for 4 and 8 kg ha-1 doses, we recorded a similar Cu distribution as for the soil with natural Cu concentration. On the other hand, in the case of the doses of 12 and 16 kg ha-1 , there was a distinctly different pattern of distribution. The maximum dose of Cu, which can be applied every 5 years, is 8 kg ha-1 for the sandy soil with a low content of organic matter and 12 kg ha-1 for sandy loam.

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A Matter of Metals: Copper but Not Cadmium Affects the Microbial Alpha-Diversity of Soils and Sediments — a Meta-analysis

et al. 2022

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Heavy metal (HM) accumulation in soil affects plants and soil fauna, yet the effect on microbial alpha-diversity remains unclear, mainly due to the absence of dedicated research synthesis (e.g. meta-analysis). Here, we report the first meta-analysis of the response of soil microbial alpha-diversity to the experimental addition of cadmium (Cd) and copper (Cu). We considered studies conducted between 2013 and 2022 using DNA metabarcoding of bacterial and fungal communities to overcome limitations of other cultivation- and electrophoresis-based techniques. Fungi were discarded due to the limited study number (i.e. 6 studies). Bacterial studies resulted in 66 independent experiments reported in 32 primary papers from four continents. We found a negative dose-dependent response for Cu but not for Cd for bacterial alpha-diversity in the environments, only for Cu additions exceeding 29.6 mg kg−1 (first loss of − 0.06% at 30 mg kg−1). The maximal loss of bacterial alpha-diversity registered was 13.89% at 3837 mg kg−1. Our results first highlight that bacterial communities behave differently to soil pollution depending on the metal. Secondly, our study suggests that even extreme doses of Cu do not cause a dramatic loss in alpha-diversity, highlighting how the behaviour of bacterial communities diverges from soil macro-organisms. Graphical abstract

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Vertical Distribution of Copper in Copper-Contaminated Coffee Fields in Kilimanjaro, Tanzania

Cited by 6 publications

References 31 publications

Comparative assessment of selected micronutrients under three different land use systems in Odighi, Edo State, Nigeria

Comparative assessment of selected micronutrients under three different land use systems in Odighi, Edo State, Nigeria

Fate of Copper in Soils from Different Fertilizer Doses in Relation to Environmental Risk Assessment

A Matter of Metals: Copper but Not Cadmium Affects the Microbial Alpha-Diversity of Soils and Sediments — a Meta-analysis

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