Abstract
The humic and fulvic acid fractions of humic substances were extracted from well decomposed FYM and there after isolated, purified, lyophilized and complexed with zinc. The efficacy of Zn-organo complexes in supplying zinc was evaluated in a glasshouse experiment with maize as the test crop. Zinc concentration in plant increased with increasing Zn level and the highest Zn concentration was observed when Zn was applied as Zn-fulvate at the level of 10 mg Zn kg−1 soil. Dry matter production was increased with increasing Zn level until the attainment of critical zinc concentration of the plant. The highest dry matter was produced when critical Zn concentration in plant reached ≍ 39 mg kg−1 which was attained by the application of 10.0 mg Zn as ZnSO4, 5.0 mg Zn as Zn-humate, 2.5 mg Zn as Zn-humate-fulvate and 1.0 mg Zn as Zn-fulvate kg−1 soil. Irrespective of zinc sources, zinc recovery was as follows: 0.25 mg Zn kg−1 > 0.5 mg Zn kg−1 > 1.0 mg Zn kg−1 > 2.5 mg Zn kg−1 > 5.0 mg Zn kg−1 >10.0 mg Zn kg−1 soil and irrespective of levels, the average zinc recovery by plant from different sources was as follows: Zn-FA> Zn-HA-FA > Zn-HA > ZnSO4. Thus, zinc-fulvate was found as the most efficient in respect of supplying zinc, increasing plant height and total dry matter production followed by zinc-humate-fulvate, zinc-humate and ZnSO4.
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Claims 6
Claim · model-written summary
Plant zinc concentration increased with zinc level, with the highest level under zinc fulvate at 10 mg Zn per kg soil.
- Treatment
- Zn-fulvate at the level of 10 mg Zn kg−1 soile0
- Outcome
- Zinc concentration in plante0
- Direction
- increasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc concentration in plant increased with increasing Zn level and the highest Zn concentration was observed when Zn was applied as Zn-fulvate at the level of 10 mg Zn kg−1 soil”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Dry matter production increased with zinc level until critical plant zinc concentration.
- Treatment
- increasing Zn levele0
- Outcome
- Dry matter productione0
- Direction
- increasede0
- Qualifier
- critical zinc concentration of the plante0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter production was increased with increasing Zn level until the attainment of critical zinc concentration of the plant”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Highest dry matter occurred at approximately 39 mg per kg critical plant zinc concentration, attained by four stated source and dose combinations.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest dry matter was produced when critical Zn concentration in plant reached ≍ 39 mg kg−1 which was attained by the application of 10.0 mg Zn as ZnSO4, 5.0 mg Zn as Zn-humate, 2.5 mg Zn as Zn-humate-fulvate and 1.0 mg Zn as Zn-fulvate kg−1 soil”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Zinc recovery declined across the ranked zinc application levels.
- Outcome
- zinc recoverye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrespective of zinc sources, zinc recovery was as follows: 0.25 mg Zn kg−1 > 0.5 mg Zn kg−1 > 1.0 mg Zn kg−1 > 2.5 mg Zn kg−1 > 5.0 mg Zn kg−1 >10.0 mg Zn kg−1 soil”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Average plant zinc recovery ranked Zn-FA above Zn-HA-FA, Zn-HA and ZnSO4.
- Outcome
- average zinc recovery by plante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the average zinc recovery by plant from different sources was as follows: Zn-FA> Zn-HA-FA > Zn-HA > ZnSO4”
t0“Maize (Zea mays L.)”
Claim · model-written summary
Zinc fulvate was judged most efficient for zinc supply, plant height and total dry matter, followed by zinc humate fulvate, zinc humate and ZnSO4.
- Outcome
- supplying zinc, increasing plant height and total dry matter productione0
- Direction
- most efficiente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“zinc-fulvate was found as the most efficient in respect of supplying zinc, increasing plant height and total dry matter production followed by zinc-humate-fulvate, zinc-humate and ZnSO4”
t0“Maize (Zea mays L.)”
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See all 441 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.