Abstract
White clover (Trifolium repens L.) is at a disadvantage to perennial ryegrass (Lolium perenne L.; PRG) due to its limited cold tolerance and low growth rates at colder temperatures, which can affect subsequent spring herbage dry matter (DM) availability. The effect of PRG ploidy on white clover morphology and growth over winter, and its subsequent recovery in spring and the following growing season, is poorly understood. The objective of this study was to compare the effect of white clover inclusion and PRG ploidy on sward structure, plant morphology and growth of PRG–white clover swards over winter. Four swards (diploid PRG only, tetraploid PRG only, diploid PRG–white clover and tetraploid PRG–white clover) were evaluated over a full winter period (November–February) at a farmlet scale. The PRG ploidy had no effect on herbage DM production, white clover content or tissue turnover (P > 0.05) over winter. However, white clover inclusion caused a significant decrease in herbage DM production (P < 0.001; −254 kg DM/ha) and tiller density (P < 0.001; −1,953 tillers/m 2 ) over winter. Stolon mass was not affected by PRG ploidy (P > 0.05); however, stolon length and number of leaves per stolon were affected by PRG ploidy (P < 0.05). Including white clover in PRG swards can alter winter sward dynamics, potentially causing difficulties in subsequent spring management and performance due to the reduced over-winter growth rate when compared with PRG.
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Claims 6
Claim · model-written summary
PRG ploidy had no effect on herbage DM production, white clover content or tissue turnover over winter (P > 0.05).
- Taxon
- perennial ryegrass
Lolium perennet0 - Treatment
- PRG ploidye0
- Outcome
- herbage DM production, white clover content or tissue turnovere0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PRG ploidy had no effect on herbage DM production, white clover content or tissue turnover (P > 0.05) over winter”
t0“perennial ryegrass”
Claim · model-written summary
White clover inclusion caused a significant decrease in herbage DM production over winter, of 254 kg DM/ha.
- Taxon
- perennial ryegrassLolium perennet0
- Treatment
- white clover inclusione0
- Outcome
- herbage DM productione0
- Direction
- decreasee0
- Value
- −254 kg DM/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“white clover inclusion caused a significant decrease in herbage DM production (P < 0.001; −254 kg DM/ha)”
t0“perennial ryegrass”
Claim · model-written summary
White clover inclusion caused a significant decrease in tiller density over winter, of 1,953 tillers/m2.
- Taxon
- perennial ryegrassLolium perennet0
- Treatment
- white clover inclusione1
- Outcome
- tiller densitye0
- Direction
- decreasee1
- Value
- −1,953 tillers/m 2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tiller density (P < 0.001; −1,953 tillers/m 2”
e1“white clover inclusion caused a significant decrease in herbage DM production”
t0“perennial ryegrass”
Claim · model-written summary
Stolon mass was not affected by PRG ploidy (P > 0.05).
- Taxon
- perennial ryegrassLolium perennet0
- Treatment
- PRG ploidye0
- Outcome
- Stolon masse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stolon mass was not affected by PRG ploidy (P > 0.05)”
t0“perennial ryegrass”
Claim · model-written summary
Stolon length and number of leaves per stolon were affected by PRG ploidy (P < 0.05).
- Taxon
- perennial ryegrassLolium perennet0
- Treatment
- PRG ploidye0
- Outcome
- stolon length and number of leaves per stolone0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stolon length and number of leaves per stolon were affected by PRG ploidy (P < 0.05)”
t0“perennial ryegrass”
Claim · model-written summary
Including white clover in PRG swards can alter winter sward dynamics, potentially causing difficulties in spring management through reduced over-winter growth rate compared with PRG.
- Taxon
- perennial ryegrassLolium perennet0
- Treatment
- Including white clover in PRG swardse0
- Outcome
- over-winter growth ratee0
- Direction
- reducede0
- Comparator
- PRGe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Including white clover in PRG swards can alter winter sward dynamics, potentially causing difficulties in subsequent spring management and performance due to the reduced over-winter growth rate when compared with PRG”
t0“perennial ryegrass”
The same questions in other papers
Trifolium repens · growth · Lolium perenne (perennial ryegrass)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
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Trifolium repens · yield · Lolium perenne (perennial ryegrass)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
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2 papers more in this group
See all 6 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.