Abstract
Two growth chamber experiments were conducted to assess the plant availability of Zn fractions in nine Saskatchewan soils. In one experiment, two rates of Zn (0, and 5 mg kg −1 ) were applied to navy beans grown on seven soils ranging in pH from 6.2 to 7.8. Most of the applied Zn was recovered in Pb-displaceable and Mn oxide associated fractions after a 7-d incubation. Growth of navy bean plants was normal in all soils and treatments. Dry matter yield did not respond to Zn application. The positive correlations between amounts of Zn in exchangeable, Pb-displaceable and acetic acid soluble fractions and plant uptake indicated the importance of these Zn fractions in influencing availability of Zn. The DTPA soil test was not a successful method for prairie soils with diverse soil properties on the basis of correlations. In the second experiment, three rates of Zn (0, 5 and 10 mg kg −1 ) were applied to alfalfa grown on two soils with pH of 5.5 and 7.9. The total dry matter yield of alfalfa grown on the calcareous soil was increased significantly by Zn application. No yield response to added Zn was observed in the acidic soil. In both soils, applied Zn increased the Zn concentration and total Zn uptake of alfalfa significantly over the control treatment. Changes in the distribution of applied and native Zn in different fractions before seeding and at second harvest suggest that Zn taken up by plants in the calcareous soil was from exchangeable, acid soluble and possibly residual Zn. Zinc uptake by plants grown on the acid soil was from exchangeable, Pb-displaceable, acid soluble and possibly from Mn oxide associated fractions. Key words: Zn fractions, plant availability, navy beans, alfalfa, pH
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Claims 11
Claim · model-written summary
Most applied Zn was in Pb-displaceable and Mn oxide associated fractions after seven days.
Not reportedTaxon
Verbatim
e0“Most of the applied Zn was recovered in Pb-displaceable and Mn oxide associated fractions after a 7-d incubation.”
Claim · model-written summary
Navy bean growth was normal across soils and treatments.
Verbatim
e0“Growth of navy bean plants was normal in all soils and treatments.”
Claim · model-written summary
Navy bean dry matter yield did not respond to Zn application.
Not reportedTaxonComparator
Verbatim
e0“Dry matter yield did not respond to Zn application.”
Claim · model-written summary
Exchangeable, Pb-displaceable and acetic acid soluble Zn fractions correlated positively with plant uptake.
- Compound
- Zne0
- Outcome
- plant uptakee0
- Direction
- positive correlationse0
- Qualifier
- exchangeable, Pb-displaceable and acetic acid soluble fractionse0
Not reportedTaxon
Verbatim
e0“The positive correlations between amounts of Zn in exchangeable, Pb-displaceable and acetic acid soluble fractions and plant uptake indicated the importance of these Zn fractions in influencing availability of Zn.”
Claim · model-written summary
The DTPA soil test was unsuccessful for diverse prairie soils by correlation assessment.
Not reportedTaxon
Verbatim
e0“The DTPA soil test was not a successful method for prairie soils with diverse soil properties on the basis of correlations.”
Claim · model-written summary
Zn application significantly increased alfalfa dry matter yield in calcareous soil.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- Zn applicatione0
- Outcome
- total dry matter yielde0
- Direction
- increasede0
- Setting
- calcareous soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total dry matter yield of alfalfa grown on the calcareous soil was increased significantly by Zn application.”
Claim · model-written summary
Added Zn produced no alfalfa yield response in acidic soil.
Not reportedTaxonComparator
Verbatim
e0“No yield response to added Zn was observed in the acidic soil.”
Claim · model-written summary
Applied Zn significantly increased alfalfa Zn concentration in both soils.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- applied Zne0
- Outcome
- Zn concentratione0
- Direction
- increasede0
- Qualifier
- both soilse0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both soils, applied Zn increased the Zn concentration and total Zn uptake of alfalfa significantly over the control treatment.”
Claim · model-written summary
Applied Zn significantly increased alfalfa total Zn uptake in both soils.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- applied Zne0
- Outcome
- total Zn uptakee0
- Direction
- increasede0
- Qualifier
- both soilse0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both soils, applied Zn increased the Zn concentration and total Zn uptake of alfalfa significantly over the control treatment.”
Claim · model-written summary
Calcareous-soil plant Zn uptake apparently came from exchangeable, acid soluble and possibly residual fractions.
- Taxon
- plantsViridiplantaee0
- Outcome
- Zn taken upe0
- Qualifier
- exchangeable, acid soluble and possibly residual Zne0
- Setting
- calcareous soile0
Not reportedDirection
Verbatim
e0“Zn taken up by plants in the calcareous soil was from exchangeable, acid soluble and possibly residual Zn.”
Claim · model-written summary
Acid-soil plant Zn uptake apparently came from exchangeable, Pb-displaceable, acid soluble and possibly Mn oxide associated fractions.
- Taxon
- plantsViridiplantaee0
- Outcome
- Zinc uptakee0
- Qualifier
- exchangeable, Pb-displaceable, acid soluble and possibly from Mn oxide associated fractionse0
- Setting
- acid soile0
Not reportedDirection
Verbatim
e0“Zinc uptake by plants grown on the acid soil was from exchangeable, Pb-displaceable, acid soluble and possibly from Mn oxide associated fractions.”
The same questions in other papers
zinc atom · yield · Medicago sativa (alfalfa)Results differ
15 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- no effect
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See all 21 papers →zinc atom · nutrient: content · Medicago sativa (alfalfa)Results agree
11 papers in the same direction as this paper
- positive
- positive
- positive
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See all 12 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.