Effect of Citrate Concentration on the Extraction Efficiency of Selected Micronutrients from Soil

Bibiso, Mesfin; Taddesse, Abi M.; Gebrekidan, Heluf; Melese, Asmare

doi:10.1080/00103624.2016.1165826

Cited by 2 publications

(2 citation statements)

References 28 publications

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“…Results of the present investigation indicated that Zn, Fe and Mn extracted from RMP at the end of the incubation by 0.05 M citric acid and DTPA followed similar patterns except for Cu. DTPA is considered to be an ideal extractant to study plant available micronutrients in the soil (Bibiso et al 2016 ), and can be used as a standard reference to test the efficiency of other extraction methods. The DTPA method was originally developed for calcareous soil.…”

Section: Resultsmentioning

confidence: 99%

“…DTPA and citric acid extractable micronutrients after incubation DTPA and citric acid are considered to be suitable extractants for studying plant available micronutrients in soils (Bibiso et al 2016). Both the extractants act as organic ligands; they reduce the activity of micronutrient cations in the solution through formation of soluble organo-metal complexes.…”

Section: Potassium Fractions After Incubationmentioning

confidence: 99%

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Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Basak

Sarkar

Naidu

2020

Environ Geochem Health

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The staggering production of rock dusts and quarry by-products of mining activities poses an immense environmental burden that warrants research for value-added recycling of these rock mineral powders (RMP). In this study, an incubation experiment was conducted to determine potassium (K) and micronutrients (Zn, Cu, Fe and Mn) release from a quarry RMP to support plant nutrition. Four different size fractions of the RMP were incubated with organic amendments (cow dung and legume straw) under controlled conditions for 90 days. Samples were collected at different intervals (7, 15, 30, 45, 60 and 90 days) for the analysis of available K and micronutrients in the mineral-OM mixtures and leachates. There was a significant (p \0.05) increase in pH of leachates from the mineral-OM mixtures. The K release was significantly higher from the finer size fraction of RMP. About 18.7% Zn added as RMP was released during the incubation period. Zn release increased from 4.7 to 23.2% as the particle size of RMP decreased. Similarly, Cu release from RMP increased from 2.9 to 21.6%, with a decrease in the particle size. Fe and Mn recovery from RMP recorded 11.2 and 6.6%, respectively. Combined application of OM and RMP showed significantly higher nutrient release than other treatments. This study indicates that effective blending of RMP with organic amendments could be a potential source of K and micronutrients in agriculture without posing a risk of toxic element contamination to the soil.

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Section: Resultsmentioning

confidence: 99%

Section: Potassium Fractions After Incubationmentioning

confidence: 99%

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Basak

Sarkar

Naidu

2020

Environ Geochem Health

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Why copper and zinc are ineffective in reducing soil urease activity in New Zealand dairy-grazed pasture soils

et al. 2018

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Micronutrients copper (Cu) and zinc (Zn) have the potential to inhibit soil urease activity (UA) and reduce ammonia (NH3) emissions over long duration (8–12 weeks) but have not been tested for reducing NH3 losses from cattle urine deposited in dairy-grazed pasture soils. The objective of this study was to assess the effectiveness and longevity of Cu and Zn in reducing soil UA, for the use of these metals to reduce NH3 emissions from deposited urine by grazing cattle. A series of experiments were conducted to (i) assess the relationship between inherent Cu and Zn status and soil UA of New Zealand dairy-grazed pasture soils, (ii) determine the impact of Cu and Zn addition to pasture soils on soil UA and (iii) investigate how soil organic carbon (C) and other C-related textural and mineralogical properties such as clay content and cation exchange capacity influence the effectiveness of added Cu and Zn in reducing urea hydrolysis. The results showed significant positive correlations of soil total C and total nitrogen (N) with soil UA. However, there were no significant negative correlations of soil UA with inherent Cu and Zn levels. Similarly, addition of Cu and Zn to soil did not significantly reduce soil UA. However, when Cu was added to two different soil supernatants there was a significant reduction in hydrolysis of urea applied at 120 and 600 mg urea-N kg–1 soil. Additions of Zn achieved negligible or small reductions in urea hydrolysis after 120 and 600 mg urea-N kg–1 soil applications to soil supernatants. This result suggests that Cu can inhibit soil UA and urea hydrolysis in soil supernatants with potentially low C, clay and cation exchangeable base contents. However, the interaction of bioavailable Cu with labile soil organic C and clay particles leads to its inactivation, resulting in ineffectiveness in organic C-rich pasture soils. Although most of the added Zn did not complex and remained bioavailable, the observed levels of bioavailable Zn had limited effect on soil UA.

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Effect of Citrate Concentration on the Extraction Efficiency of Selected Micronutrients from Soil

Cited by 2 publications

References 28 publications

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Environmentally safe release of plant available potassium and micronutrients from organically amended rock mineral powder

Why copper and zinc are ineffective in reducing soil urease activity in New Zealand dairy-grazed pasture soils

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