Copper micronutrient fixation kinetics and interactions with soil constituents in semi-arid alkaline soils

Theophilus K. Udeigwe, Madeleine Eichmann, Peter N. Eze, George M. Ogendi, Molly N. Morris, Meagan R. Riley

Research output: Contribution to journalArticle

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Abstract

This study examined the fixation pattern and kinetics of plant-available [diethylene triamine pentaacetic acid (DTPA)-extractable] copper (Cu), as well as basic soil properties that influence Cu availability in selected semi-arid soils. Soil samples from six different series were used and data obtained from Cu extraction experiments fitted to various kinetic models. Soils were also characterized for a suite of chemical and physical properties. The majority (80%) of the plant-available Cu fixed over the experimental period of 90 d occurred within the first 14 d. The amount of plant-available Cu fixed within the first 14 d tended to be influenced by the combination of organic matter (OM) and pH. The total amount of Cu fixed at the end of the experimental period of 90 d was influenced by pH and a combination of pH and calcium carbonate. The fixation of plant-available Cu over the experimental period was better described by the power function model [R2 = 0.90, Standard Error (SE) = 0.099] but poorly by the other models (R2: 0.58 to 0.59), while reactions within the first 35 d were better described by the second-order model (R2 = 0.98, SE = 0.008), suggesting a different fixation pattern. Findings from this study provide a basis for a more mechanistic approach to evaluating and comparing the fixation of Cu micronutrient compounds in these semi-arid soils for more scientific management decision making.

Original languageEnglish
Pages (from-to)289-296
Number of pages8
JournalSoil Science and Plant Nutrition
Volume62
Issue number3
DOIs
Publication statusPublished - May 3 2016

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semiarid soils
alkaline soils
dietary minerals
fixation
copper
trace element
kinetics
soil
calcium carbonate
decision making
chemical property
soil properties
physical properties
soil property
physicochemical properties
soil organic matter
soil sampling
physical property
organic matter
acids

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Plant Science

Cite this

Udeigwe, Theophilus K. ; Eichmann, Madeleine ; Eze, Peter N. ; Ogendi, George M. ; Morris, Molly N. ; Riley, Meagan R. / Copper micronutrient fixation kinetics and interactions with soil constituents in semi-arid alkaline soils. In: Soil Science and Plant Nutrition. 2016 ; Vol. 62, No. 3. pp. 289-296.
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Copper micronutrient fixation kinetics and interactions with soil constituents in semi-arid alkaline soils. / Udeigwe, Theophilus K.; Eichmann, Madeleine; Eze, Peter N.; Ogendi, George M.; Morris, Molly N.; Riley, Meagan R.

In: Soil Science and Plant Nutrition, Vol. 62, No. 3, 03.05.2016, p. 289-296.

Research output: Contribution to journalArticle

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