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 language | English |
|---|---|
| Pages (from-to) | 289-296 |
| Number of pages | 8 |
| Journal | Soil Science and Plant Nutrition |
| Volume | 62 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - May 3 2016 |
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All Science Journal Classification (ASJC) codes
- Soil Science
- Plant Science
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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 journal › Article
TY - JOUR
T1 - Copper micronutrient fixation kinetics and interactions with soil constituents in semi-arid alkaline soils
AU - Udeigwe, Theophilus K.
AU - Eichmann, Madeleine
AU - Eze, Peter N.
AU - Ogendi, George M.
AU - Morris, Molly N.
AU - Riley, Meagan R.
PY - 2016/5/3
Y1 - 2016/5/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84979026058&partnerID=8YFLogxK
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U2 - 10.1080/00380768.2016.1197046
DO - 10.1080/00380768.2016.1197046
M3 - Article
VL - 62
SP - 289
EP - 296
JO - Soil Science and Plant Nutrition
JF - Soil Science and Plant Nutrition
SN - 0038-0768
IS - 3
ER -