Abstract
Abstract Transplanted oilseed rape (Brassica napus) appears to be sensitive to zinc (Zn) deficiency during its recovery after transplanting, suggesting that it has impaired root function and that seedlings would be responsive to placement of Zn fertilizer close to the roots. In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined. Zinc supply increased shoot dry matter from the first harvest at 10 days after transplanting whereas root pruning had no effect on shoot dry matter at 10 days but depressed it at 20 days and thereafter. The effects of root pruning on the growth response to Zn were additive to those of Zn supply. The lack of Zn uptake between 10 and 20 days after transplanting in oilseed rape with 75% of roots pruned suggests that this may be the critical period for Zn response in the field. By contrast with only 50% or none of the roots pruned, Zn uptake appeared to be unimpaired. In two field experiments, banding of Zn, Zn in irrigation water or root dipping of transplants in ZnO all increased final seed yield by an average of 10%. By contrast broadcasting ZnSO4 at transplanting had no significant effect on seed yield. All Zn fertilization treatments resulted in a large increase (>50%) in shoot dry matter at 10-leaf stage even though plants at that stage contained more than adequate Zn in their young leaves for growth. The strong growth responses to Zn at 10-leaf stage, and the lesser response at seed yield, suggests that oilseed rape experienced only a temporary Zn deficiency after transplanting. In conclusion, post-transplanting impairment of Zn uptake in oilseed rape seedlings was reduced by either placement of Zn fertilizer close to the roots or minimizing root damage during transplanting.
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Claims 16
Claim · model-written summary
Zinc supply increased shoot dry matter from the first harvest at 10 days after transplanting.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- Zinc supplye1
- Outcome
- shoot dry mattere1
- Direction
- increasede1
- Qualifier
- from the first harvest at 10 days after transplantinge1
- Setting
- glasshousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e1“Zinc supply increased shoot dry matter from the first harvest at 10 days after transplanting”
Claim · model-written summary
Root pruning had no effect on shoot dry matter at 10 days.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- root pruninge2
- Outcome
- shoot dry mattere2
- Direction
- no effecte2
- Qualifier
- at 10 dayse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e2“root pruning had no effect on shoot dry matter at 10 days but depressed it at 20 days and thereafter”
Claim · model-written summary
Root pruning depressed shoot dry matter at 20 days and thereafter.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- root pruninge2
- Outcome
- shoot dry mattere2
- Direction
- depressede2
- Qualifier
- at 20 days and thereaftere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e2“root pruning had no effect on shoot dry matter at 10 days but depressed it at 20 days and thereafter”
Claim · model-written summary
The effects of root pruning on the growth response to Zn were additive to those of Zn supply.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- root pruninge3
- Outcome
- growth response to Zne3
- Direction
- additivee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e3“The effects of root pruning on the growth response to Zn were additive to those of Zn supply”
Claim · model-written summary
Zn uptake was lacking between 10 and 20 days after transplanting in oilseed rape with 75% of roots pruned.
- Taxon
- oilseed rapeBrassica napuse4
- Treatment
- 75% of roots prunede4
- Outcome
- Zn uptakee4
- Qualifier
- between 10 and 20 days after transplantinge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The lack of Zn uptake between 10 and 20 days after transplanting in oilseed rape with 75% of roots pruned suggests that this may be the critical period for Zn response in the field”
Claim · model-written summary
The 10-20 day lack of Zn uptake may be the critical period for Zn response in the field.
- Taxon
- oilseed rapeBrassica napuse4
- Outcome
- critical period for Zn response in the fielde4
- Qualifier
- the lack of Zn uptake between 10 and 20 days after transplantinge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The lack of Zn uptake between 10 and 20 days after transplanting in oilseed rape with 75% of roots pruned suggests that this may be the critical period for Zn response in the field”
Claim · model-written summary
With only 50% or none of the roots pruned, Zn uptake appeared to be unimpaired, compared with 75% of roots pruned.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- 50% or none of the roots prunede5
- Outcome
- Zn uptakee5
- Qualifier
- appeared to be unimpairede5
- Comparator
- 75% of roots prunede4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e4“The lack of Zn uptake between 10 and 20 days after transplanting in oilseed rape with 75% of roots pruned suggests that this may be the critical period for Zn response in the field”
e5“By contrast with only 50% or none of the roots pruned, Zn uptake appeared to be unimpaired”
Claim · model-written summary
Banding of Zn increased final seed yield by an average of 10% in two field experiments.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- banding of Zne6
- Outcome
- final seed yielde6
- Direction
- increasede6
- Value
- 10%e6
- Setting
- two field experimentse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e6“In two field experiments, banding of Zn, Zn in irrigation water or root dipping of transplants in ZnO all increased final seed yield by an average of 10%”
Claim · model-written summary
Zn in irrigation water increased final seed yield by an average of 10% in two field experiments.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- Zn in irrigation watere6
- Outcome
- final seed yielde6
- Direction
- increasede6
- Value
- 10%e6
- Setting
- two field experimentse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e6“In two field experiments, banding of Zn, Zn in irrigation water or root dipping of transplants in ZnO all increased final seed yield by an average of 10%”
Claim · model-written summary
Root dipping of transplants in ZnO increased final seed yield by an average of 10% in two field experiments.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- root dipping of transplants in ZnOe6
- Outcome
- final seed yielde6
- Direction
- increasede6
- Value
- 10%e6
- Setting
- two field experimentse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e6“In two field experiments, banding of Zn, Zn in irrigation water or root dipping of transplants in ZnO all increased final seed yield by an average of 10%”
Claim · model-written summary
Broadcasting ZnSO4 at transplanting had no significant effect on seed yield.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- broadcasting ZnSO4 at transplantinge7
- Outcome
- seed yielde7
- Direction
- no significant effecte7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e7“By contrast broadcasting ZnSO4 at transplanting had no significant effect on seed yield”
Claim · model-written summary
All Zn fertilization treatments increased shoot dry matter by more than 50% at the 10-leaf stage.
- Taxon
- oilseed rapeBrassica napuse0
- Organ / stage
- 10-leaf stagee1
- Treatment
- Zn fertilization treatmentse1
- Outcome
- shoot dry mattere1
- Direction
- increasee1
- Value
- >50%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e1“All Zn fertilization treatments resulted in a large increase (>50%) in shoot dry matter at 10-leaf stage”
Claim · model-written summary
At the 10-leaf stage, plants contained more than adequate Zn in their young leaves for growth.
- Taxon
- oilseed rapeBrassica napuse0
- Organ / stage
- young leavese1
- Outcome
- Zn in their young leavese1
- Qualifier
- more than adequatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a glasshouse study, the response of oilseed rape seedlings to post-transplanting Zn supply and to root pruning was examined”
e1“plants at that stage contained more than adequate Zn in their young leaves for growth”
Claim · model-written summary
Oilseed rape experienced only a temporary Zn deficiency after transplanting.
- Taxon
- oilseed rapeBrassica napuse1
- Outcome
- temporary Zn deficiency after transplantinge1
- Qualifier
- strong growth responses to Zn at 10-leaf stagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The strong growth responses to Zn at 10-leaf stage, and the lesser response at seed yield, suggests that oilseed rape experienced only a temporary Zn deficiency after transplanting”
Claim · model-written summary
Post-transplanting impairment of Zn uptake was reduced by placing Zn fertilizer close to the roots.
- Taxon
- oilseed rape seedlingsBrassica napuse1
- Treatment
- placement of Zn fertilizer close to the rootse1
- Outcome
- post-transplanting impairment of Zn uptakee1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“post-transplanting impairment of Zn uptake in oilseed rape seedlings was reduced by either placement of Zn fertilizer close to the roots or minimizing root damage during transplanting”
Claim · model-written summary
Post-transplanting impairment of Zn uptake was reduced by minimizing root damage during transplanting.
- Taxon
- oilseed rape seedlingsBrassica napuse1
- Treatment
- minimizing root damage during transplantinge1
- Outcome
- post-transplanting impairment of Zn uptakee1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“post-transplanting impairment of Zn uptake in oilseed rape seedlings was reduced by either placement of Zn fertilizer close to the roots or minimizing root damage during transplanting”
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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.