Abstract
Both the beneficial and the adverse effects of various nickel level supplements on growth and chlorophyll content of canola plants were evaluated while either urea or ammonium nitrate was supplied as the sole N source in the nutrient solutions. This study was arranged in completely randomized with three replications. Treatments included nutrient solution cultures containing urea and ammonium nitrate at the rate of 84 mg N L-1 separately as nitrogen sources with four nickel levels as NiSO4.6H2O at the rates of 0, 0.01, 0.05 and 0.1 mg Ni L-1. Plants were allowed to grow for 6 weeks then leaves chlorophyll content and shoots and roots fresh and dry weight were determined. Both plant growth and leaves chlorophyll content of the urea-fed plants increased significantly with the increase in nickel content up to 0.1 mg Ni L-1. However, root fresh and dry weight increased up to 0.01 mg Ni L-1 and started to decrease with further increase in solutions nickel content. Nickel did not affect these parameters with plants supplied with ammonium nitrate significantly. In these plants, the optimum nickel level for shoot growth and leaves chlorophyll content was 0.05 mg L-1 and for root fresh and dry weight was 0.01 mg Ni L-1. Further increase in Ni concentration reduced growth. As a whole, plants received urea plus nickel performed better than those received ammonium nitrate plus nickel.
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Claims 8
Claim · model-written summary
In urea-fed canola, plant growth and leaf chlorophyll content increased significantly with nickel up to 0.1 mg Ni L-1.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napust0 - Treatment
- nickel contente0
- Outcome
- plant growth and leaves chlorophyll contente0
- Direction
- increasede0
- Qualifier
- urea-fed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“Both plant growth and leaves chlorophyll content of the urea-fed plants increased significantly with the increase in nickel content up to 0.1 mg Ni L-1”
Claim · model-written summary
Canola root fresh and dry weight increased with nickel up to 0.01 mg Ni L-1.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- nickele0
- Outcome
- root fresh and dry weighte0
- Direction
- increasede0
- Qualifier
- up to 0.01 mg Ni L-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“root fresh and dry weight increased up to 0.01 mg Ni L-1 and started to decrease with further increase in solutions nickel content”
Claim · model-written summary
Canola root fresh and dry weight decreased with further increase in nickel.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- further increase in solutions nickel contente0
- Outcome
- root fresh and dry weighte0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“root fresh and dry weight increased up to 0.01 mg Ni L-1 and started to decrease with further increase in solutions nickel content”
Claim · model-written summary
Nickel did not significantly affect canola growth and chlorophyll with ammonium nitrate supply.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- nickele0
- Outcome
- these parameterse0
- Direction
- no_changeinferrede0
- Qualifier
- plants supplied with ammonium nitratee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“Nickel did not affect these parameters with plants supplied with ammonium nitrate significantly”
Claim · model-written summary
The optimum nickel level for canola shoot growth and leaf chlorophyll was 0.05 mg L-1 with ammonium nitrate supply.
- Taxon
- canolaBrassica napus var. napust0
- Outcome
- optimum nickel level for shoot growth and leaves chlorophyll contente0
- Value
- 0.05 mg L-1e0
- Qualifier
- In these plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“In these plants, the optimum nickel level for shoot growth and leaves chlorophyll content was 0.05 mg L-1 and for root fresh and dry weight was 0.01 mg Ni L-1”
Claim · model-written summary
The optimum nickel level for canola root fresh and dry weight was 0.01 mg Ni L-1 with ammonium nitrate supply.
- Taxon
- canolaBrassica napus var. napust0
- Outcome
- root fresh and dry weighte0
- Value
- 0.01 mg Ni L-1e0
- Qualifier
- In these plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“In these plants, the optimum nickel level for shoot growth and leaves chlorophyll content was 0.05 mg L-1 and for root fresh and dry weight was 0.01 mg Ni L-1”
Claim · model-written summary
Further increase in nickel concentration reduced canola growth.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- Further increase in Ni concentratione0
- Outcome
- growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“Further increase in Ni concentration reduced growth”
Claim · model-written summary
Canola plants supplied with urea plus nickel performed better than those with ammonium nitrate plus nickel.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- urea plus nickele0
- Outcome
- performede0
- Direction
- bettere0
- Comparator
- ammonium nitrate plus nickele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth and Chlorophyll Content of Canola Plants Supplied with Urea and Ammonium Nitrate in Response to Various Nickel Levels”
e0“As a whole, plants received urea plus nickel performed better than those received ammonium nitrate plus nickel”
The same questions in other papers
nickel atom · physiology: pigments · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
- negative
nickel atom · growth · Brassica napus (oilseed rape)Positive and negative results
4 in the opposite direction
- negative
- negative
- negative
1 paper more in this group
See all 5 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.