Abstract
The objective of this research was to determine the effect of nitrogen concentration and the periodicity of harvests on leaf growth and essential oil production of rosemary plants in soilless cultivation. Plants were grown in 3 dm3 polypropylene pots filled with sand and fertigated by means of nutrient solutions at N concentrations of 5.55; 8.05; 10.55; 13.05 and 15.55 mmol/l, without variations in concentrations of the other nutrients. The total number of harvests during the experimental period varied from one to four (C1, C2, C3 and C4). In C4, the first harvest was made in April 2013, at 90 (DAP), and repeated three times reaching four harvests at the end of the experiment; in C3, the first harvest was in July 2013, at 180 DAP, and repeated two times, reaching three harvests; in C2, the first harvest was in October 2013, at 270 DAP, and repeated once a time, reaching two harvests; in C1, only one harvest was made in January 2014, at 365 DAP, any harvest being done before. A 5x4 factorial entirely randomized experimental design was used, with 44 plants per plot. It was determined the leaf production and yield of essential oil extracted in a Clevenger. Results showed that leaf production and yield of essential oil are higher by making only one harvest at 365 DAP and using a nutrient solution at N concentration of 9.40 mmol/l.
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Claims 2
Claim · model-written summary
A single harvest at 365 days after planting gave higher leaf production and essential oil yield in rosemary.
- Taxon
- Rosmarinus officinalis
Salvia rosmarinust0 - Treatment
- making only one harvest at 365 DAPe1
- Outcome
- leaf production and yield of essential oile1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alecrim (Rosmarinus officinalis)”
e1“Results showed that leaf production and yield of essential oil are higher by making only one harvest at 365 DAP and using a nutrient solution at N concentration of 9.40 mmol/l”
Claim · model-written summary
A nutrient solution at N concentration of 9.40 mmol/l gave higher leaf production and essential oil yield in rosemary.
- Taxon
- Rosmarinus officinalisSalvia rosmarinust0
- Treatment
- nutrient solution at N concentration of 9.40 mmol/le1
- Outcome
- leaf production and yield of essential oile1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alecrim (Rosmarinus officinalis)”
e1“Results showed that leaf production and yield of essential oil are higher by making only one harvest at 365 DAP and using a nutrient solution at N concentration of 9.40 mmol/l”
The same questions in other papers
fertilization · yield · Salvia rosmarinus (rosemary)Results agree
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See all 9 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.