Abstract
Abstract The impact of a range of simulated pasture management options on damage to white clover resulting from the presence of the clover root weevil was evaluated in a glasshouse experiment. Pasture management options included were irrigation, cutting regime, cultivar, soil fertility (Olsen P) level, and nitrogen application. Two different soil types were used. White clover growth was significantly enhanced by moist soil conditions, as were clover root weevil (CRW) larval numbers recovered per plot. Few (<1%) CRW larvae developed from the eggs (applied at 4000/m 2 ) under dry soil conditions. Dry soil conditions dominated any effect that could be attributed to other treatments. More (c. 10.5%) CRW larvae developed under moist soil conditions, but clover plants tolerated this without significant losses to shoot production, although it did significantly ( P = 0.01) affect shoot/ root ratio (on average 50% lower when CRW larvae were present). More clover dry matter was produced on mineral soil ( P < 0.05), when nitrogen was applied ( P < 0.05) and when the cultivar ‘Challenge’ was used instead of ‘Prop’ ( P < 0.001). Cutting regime had a minor influence ( P < 0.10) on clover production but the influence of Olsen‐P level was not significant.
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Claims 12
Claim · model-written summary
Moist soil significantly enhanced white clover growth.
- Taxon
- White clover
Trifolium repense0 - Treatment
- moist soil conditionse0
- Outcome
- growthe0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“White clover growth was significantly enhanced by moist soil conditions, as were clover root weevil (CRW) larval numbers recovered per plot.”
Claim · model-written summary
Moist soil significantly enhanced root weevil larval numbers recovered per plot.
- Taxon
- clover root weevil
_-_Clover_weevil_(9668741303).jpg?width=60)
Sitona hispiduluse0 - Treatment
- moist soil conditionse0
- Interactor
- White cloverTrifolium repense0host
- Outcome
- clover root weevil (CRW) larval numbers recovered per plote0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_Clover_weevil_(9668741303).jpg?width=500)
Verbatim
e0“White clover growth was significantly enhanced by moist soil conditions, as were clover root weevil (CRW) larval numbers recovered per plot.”
Claim · model-written summary
Under dry soil conditions fewer than 1% of root weevil larvae developed from eggs applied at 4000/m 2.
- Taxon
- clover root weevilSitona hispiduluse1
- Treatment
- dry soil conditionse0
- Outcome
- CRW larvae developede0
- Direction
- Fewe0
- Value
- <1%e0
- Qualifier
- applied at 4000/m 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Few (<1%) CRW larvae developed from the eggs (applied at 4000/m 2 ) under dry soil conditions.”
e1“clover root weevil (CRW)”
Claim · model-written summary
Dry soil dominated effects attributable to other treatments.
- Taxon
- white cloverTrifolium repense1
- Treatment
- Dry soil conditionse0
- Outcome
- dominated any effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry soil conditions dominated any effect that could be attributed to other treatments.”
e1“damage to white clover”
Claim · model-written summary
More root weevil larvae, about 10.5%, developed in moist soil.
- Taxon
- clover root weevilSitona hispiduluse1
- Treatment
- moist soil conditionse0
- Outcome
- CRW larvae developede0
- Direction
- Moree0
- Value
- c. 10.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More (c. 10.5%) CRW larvae developed under moist soil conditions”
e1“clover root weevil (CRW)”
Claim · model-written summary
Clover tolerated larvae in moist soil without significant shoot production losses.
- Treatment
- CRW larvaee0
- Interactor
- clover root weevilSitona hispiduluse1pest
- Outcome
- shoot productione0
- Direction
- without significant lossese0
- Qualifier
- moist soil conditionse0
TrifoliumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More (c. 10.5%) CRW larvae developed under moist soil conditions, but clover plants tolerated this without significant losses to shoot production”
e1“clover root weevil (CRW)”
Claim · model-written summary
Root weevil larvae significantly lowered clover shoot/root ratio by 50% on average.
- Treatment
- CRW larvae were presente0
- Interactor
- clover root weevilSitona hispiduluse2pest
- Outcome
- shoot/ root ratioe0
- Direction
- lowere0
- Value
- 50%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although it did significantly ( P = 0.01) affect shoot/ root ratio (on average 50% lower when CRW larvae were present).”
e1“clover plants tolerated this”
e2“clover root weevil (CRW)”
Claim · model-written summary
Mineral soil increased clover dry matter production significantly.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More clover dry matter was produced on mineral soil ( P < 0.05), when nitrogen was applied ( P < 0.05) and when the cultivar ‘Challenge’ was used instead of ‘Prop’ ( P < 0.001).”
Claim · model-written summary
Nitrogen application significantly increased clover dry matter production.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More clover dry matter was produced on mineral soil ( P < 0.05), when nitrogen was applied ( P < 0.05) and when the cultivar ‘Challenge’ was used instead of ‘Prop’ ( P < 0.001).”
Claim · model-written summary
Challenge produced significantly more clover dry matter than Prop.
- Material
- Challengee0
- Treatment
- cultivar ‘Challenge’e0
- Outcome
- clover dry mattere0
- Direction
- Moree0
- Comparator
- Prope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More clover dry matter was produced on mineral soil ( P < 0.05), when nitrogen was applied ( P < 0.05) and when the cultivar ‘Challenge’ was used instead of ‘Prop’ ( P < 0.001).”
Claim · model-written summary
Cutting regime had a minor influence on clover production at P < 0.10.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cutting regime had a minor influence ( P < 0.10) on clover production but the influence of Olsen‐P level was not significant.”
Claim · model-written summary
The influence of Olsen-P level on clover production was not significant.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cutting regime had a minor influence ( P < 0.10) on clover production but the influence of Olsen‐P level was not significant.”
The same questions in other papers
nitrogen · growth · TrifoliumResults differ
7 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
10 papers more in this group
See all 14 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.