Abstract
In plants, apical dominance prevents the development of lateral shoots. It can be overwhelmed by apical bud defoliation, allowing numerous lateral buds to develop into more lateral branches carrying more fruits and possibly increasing seed yield. This study tested this hypothesis on five hemp (Cannabis sativa L.) cultivars in a 2-year field experiment. In comparison to the intact ones, the defoliated plants developed several lateral shoots. The hemp seed yield was significantly influenced by the year of production, the apical bud removal, and the cultivar. The average two-year seed yield of the defoliated plants (715 ± 47 kg/ha) was significantly higher than the yield of the intact plants (568 ± 35 kg/ha). Absolutely the greatest effect of apical bud removal on the seed yield was observed for the cultivar ‘Novosadska konoplja’, where increase was 225 kg/ha (25%); a slightly smaller difference occurred for the cultivar ‘Uniko-B’ (183 kg; 30%), followed by ‘Juso-11’ (140 kg/ha; 27%) and ‘Bialobrzeskie’ (128 kg/ha; 29). Cultivar ‘Beniko’ presented the smallest difference with apical bud removal – 58 kg/ha (15%) yield increase We maintain that hemp producers can achieve a larger seed yield not only by selecting an appropriate cultivar and row distance but also by removing apical buds.
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Claims 10
Claim · model-written summary
Defoliated hemp plants developed several lateral shoots compared with intact plants.
- Taxon
- hemp
Cannabis sativa subsp. sativat0 - Treatment
- defoliatede0
- Outcome
- lateral shootse0
- Direction
- severale0
- Comparator
- intact onese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison to the intact ones, the defoliated plants developed several lateral shoots.”
t0“hemp (Cannabis sativa L.)”
Claim · model-written summary
Hemp seed yield was significantly influenced by production year.
- Taxon
- hempCannabis sativa subsp. sativae0
- Outcome
- seed yielde0
- Setting
- year of productione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hemp seed yield was significantly influenced by the year of production, the apical bud removal, and the cultivar.”
Claim · model-written summary
Hemp seed yield was significantly influenced by cultivar.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- cultivare0
- Outcome
- seed yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hemp seed yield was significantly influenced by the year of production, the apical bud removal, and the cultivar.”
Claim · model-written summary
Defoliated plants averaged 715 ± 47 kg/ha seed yield over two years, significantly higher than intact plants at 568 ± 35 kg/ha.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- defoliated plantse0
- Outcome
- seed yielde0
- Direction
- highere0
- Value
- 715 ± 47 kg/hae0
- Qualifier
- 568 ± 35 kg/hae0
- Comparator
- intact plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average two-year seed yield of the defoliated plants (715 ± 47 kg/ha) was significantly higher than the yield of the intact plants (568 ± 35 kg/ha).”
t0“hemp (Cannabis sativa L.)”
Claim · model-written summary
Apical bud removal increased seed yield of Novosadska konoplja by 225 kg/ha (25%).
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- Novosadska konopljae0
- Treatment
- apical bud removale0
- Outcome
- seed yielde0
- Direction
- increasee0
- Value
- 225 kg/ha (25%)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest effect of apical bud removal on the seed yield was observed for the cultivar ‘Novosadska konoplja’, where increase was 225 kg/ha (25%)”
t0“hemp (Cannabis sativa L.)”
Claim · model-written summary
Apical bud removal increased Uniko-B seed yield by 183 kg (30%).
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- Uniko-Be0
- Treatment
- Apical bud removalt0
- Outcome
- seed yieldt0
- Direction
- increasedt0
- Value
- 183 kg; 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a slightly smaller difference occurred for the cultivar ‘Uniko-B’ (183 kg; 30%)”
t0“Apical bud removal increased seed yield in hemp (Cannabis sativa L.)”
Claim · model-written summary
Apical bud removal increased Juso-11 seed yield by 140 kg/ha (27%).
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- Juso-11e0
- Treatment
- Apical bud removalt0
- Outcome
- seed yieldt0
- Direction
- increasedt0
- Value
- 140 kg/ha; 27%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by ‘Juso-11’ (140 kg/ha; 27%)”
t0“Apical bud removal increased seed yield in hemp (Cannabis sativa L.)”
Claim · model-written summary
Apical bud removal increased Bialobrzeskie seed yield by 128 kg/ha (29).
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- Bialobrzeskiee0
- Treatment
- Apical bud removalt0
- Outcome
- seed yieldt0
- Direction
- increasedt0
- Value
- 128 kg/ha; 29e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“‘Bialobrzeskie’ (128 kg/ha; 29)”
t0“Apical bud removal increased seed yield in hemp (Cannabis sativa L.)”
Claim · model-written summary
Apical bud removal increased Beniko seed yield by 58 kg/ha (15%), the smallest reported difference.
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- Benikoe0
- Treatment
- apical bud removale0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 58 kg/ha (15%)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivar ‘Beniko’ presented the smallest difference with apical bud removal – 58 kg/ha (15%) yield increase”
t0“hemp (Cannabis sativa L.)”
Claim · model-written summary
The authors recommend apical bud removal to increase hemp seed yield.
- Taxon
- hempCannabis sativa subsp. sativae0
- Outcome
- removing apical budse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hemp producers can achieve a larger seed yield not only by selecting an appropriate cultivar and row distance but also by removing apical buds.”
The same questions in other papers
pruning · yield · Cannabis sativaPositive and negative results
2 in the opposite direction
- no effect
- negative
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.