Abstract
Silvicultural systems which retain canopy cover during the regeneration phase have become an increasingly important form of management, but their effectiveness in controlling weed species has not been extensively studied. The development of bramble, which is a widespread competitive weed species, was observed within a c. 35-year-old Corsican pine stand thinned to remove 10, 20, 40 and 80 per cent of basal area. Cover, height and numbers of inflorescences and berries were recorded in each of the 3 years following thinning and were generally ranked according to intensity of thinning, but there were no significant differences between treatments. Shoot length, estimated using a grid-intersection method, was significantly lower in the 10 per cent compared with the 40 and 80 per cent thinning treatments. The initial length of bramble shoot present, and basal area and number of trees remaining could be used in various combinations to predict cover, height and shoot length. Although the bramble thicket was generally less well developed in the less-intense thinning treatments, these did not appear to enhance the establishment of trees. Seedlings grew best in the 80 per cent treatment and overall their mean heights were generally lower than that of bramble. Retention of overstorey cover in order to suppress bramble growth and promote tree seedling establishment during forest regeneration may not succeed.
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Claims 8
Claim · model-written summary
Bramble cover, height, inflorescences and berries generally ranked with thinning intensity, without significant treatment differences.
RubusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cover, height and numbers of inflorescences and berries were recorded in each of the 3 years following thinning and were generally ranked according to intensity of thinning, but there were no significant differences between treatments.”
t0“bramble (Rubus fruticosus L. agg.)”
Claim · model-written summary
Bramble shoot length was significantly lower with 10% than with 40% and 80% thinning.
- Treatment
- 10 per cente0
- Outcome
- Shoot lengthe0
- Direction
- lowere0
- Comparator
- 40 and 80 per cent thinning treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot length, estimated using a grid-intersection method, was significantly lower in the 10 per cent compared with the 40 and 80 per cent thinning treatments.”
t0“bramble (Rubus fruticosus L. agg.)”
Claim · model-written summary
Initial bramble shoot length and remaining tree basal area and number predicted bramble cover, height and shoot length.
- Organ / stage
- bramble shoote0
- Outcome
- cover, height and shoot lengthe0
- Qualifier
- basal area and number of trees remaininge0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The initial length of bramble shoot present, and basal area and number of trees remaining could be used in various combinations to predict cover, height and shoot length.”
t0“bramble (Rubus fruticosus L. agg.)”
Claim · model-written summary
Less intense thinning produced generally less developed bramble thickets.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the bramble thicket was generally less well developed in the less-intense thinning treatments”
t0“bramble (Rubus fruticosus L. agg.)”
Claim · model-written summary
Less intense thinning did not appear to enhance tree establishment.
- Taxon
- Corsican pine
Pinus nigra subsp. laricioe2 - Treatment
- less-intense thinning treatmentse1
- Outcome
- establishment of treese0
- Direction
- did not appear to enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these did not appear to enhance the establishment of trees”
e1“less-intense thinning treatments”
e2“Corsican pine stand”
Claim · model-written summary
Tree seedlings grew best under 80% thinning.
- Taxon
- Corsican pinePinus nigra subsp. laricioe1
- Treatment
- 80 per cent treatmente0
- Outcome
- Seedlings grewe0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings grew best in the 80 per cent treatment”
e1“Corsican pine stand”
Claim · model-written summary
Tree seedlings were generally shorter than bramble.
- Taxon
- Corsican pinePinus nigra subsp. laricioe2
- Outcome
- mean heightse0
- Direction
- lowere0
- Comparator
- bramblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their mean heights were generally lower than that of bramble”
e1“Seedlings grew best”
e2“Corsican pine stand”
Claim · model-written summary
The authors concluded overstorey retention may fail to suppress bramble and promote tree establishment.
- Taxon
- Corsican pinePinus nigra subsp. laricioe1
- Outcome
- may not succeede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Retention of overstorey cover in order to suppress bramble growth and promote tree seedling establishment during forest regeneration may not succeed.”
e1“Corsican pine stand”
The same questions in other papers
pruning · growth · Pinus nigra (black pine)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
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.