Abstract
Fennel ( Foeniculum vulgare Mill.) is grown commercially in Tasmania for the production of a steam-distilled essential oil, which is high in trans -anethole. Often, only the generative canopy is harvested since this contains the bulk of the oil and further this oil is higher in anethole than oil from other parts of the plant. Regardless of whether the whole crop is forage harvested or the generative canopy alone is removed using a combine-harvester, the most efficient oil production occurs when the greatest proportion of the canopy is generative, giving maximum oil yield from a minimum of fresh weight to be processed. A trial was conducted to examine the relationship between stand density and the various yield components of fennel in order to predict the likely effect on yield of increasing stem density as the short term perennial crop matures. As for most crops, planting density and biomass yield are closely related and the optimum planting density was predicted using a mathematical model. The results suggest that an initial stand density of 10 to 12 plants/m 2 , in a square layout, would produce the greatest yield of essential oil per unit area by maximising the production of the generative canopy. This density also maximises the yield of oil relative to the weight of material to be distilled.
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Claims 3
Claim · model-written summary
Fennel planting density and biomass yield were closely related.
- Taxon
- Fennel
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=60)
Anethum foeniculumt0 - Treatment
- planting densitye0
- Outcome
- biomass yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=500)
Verbatim
e0“As for most crops, planting density and biomass yield are closely related and the optimum planting density was predicted using a mathematical model.”
t0“Fennel”
Claim · model-written summary
An initial density of 10 to 12 plants/m 2 in a square layout was predicted to maximize essential oil yield per area through generative canopy production.
- Taxon
- FennelAnethum foeniculumt0
- Treatment
- initial stand density of 10 to 12 plants/m 2e0
- Outcome
- yield of essential oil per unit areae0
- Direction
- greateste0
- Qualifier
- in a square layoute0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results suggest that an initial stand density of 10 to 12 plants/m 2 , in a square layout, would produce the greatest yield of essential oil per unit area by maximising the production of the generative canopy.”
t0“Fennel”
Claim · model-written summary
The predicted optimal density also maximizes oil yield relative to material weight distilled.
- Taxon
- FennelAnethum foeniculumt0
- Treatment
- initial stand density of 10 to 12 plants/m 2e1
- Outcome
- yield of oil relative to the weight of material to be distillede0
- Direction
- maximisese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This density also maximises the yield of oil relative to the weight of material to be distilled.”
e1“an initial stand density of 10 to 12 plants/m 2 , in a square layout”
t0“Fennel”
The same questions in other papers
density · yield · Anethum foeniculum (fennel)Positive and negative results
14 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
12 papers more in this group
See all 16 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.