Abstract
Abstract The aim of this study was to find alternatives (even partial) to mineral nitrogen fertilization to reduce its harmful accumulation in the edible parts of fennel. Fennel ( Foeniculum vulgare ) is a perennial plant of the Apiaceae family grown for its edible shoots, leaves, and seeds. The present work was conducted in two successive seasons, in 2018/2019 and 2019/2020, at the farm of the Agricultural Botany Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt, to investigate the efficiency of application of two biostimulants— Spirulina platensis algae extract (SP) at 10% and compost tea (CT) at 6.72 ml L −1 —with partial doses (75 and 50%) of the recommended mineral nitrogen fertilizer dose on growth, photosynthetic pigments, fruit yield, and essential oil productivity. The results indicated that vegetative parameters, leaf number, branch number, shoot and bulb fresh weight, and shoot dry weight, as well as yield components such as 100-fruit weight and number of umbels per plant were significantly enhanced with application of SP as a foliar spray coupled with 75% of the recommended dose of nitrogen fertilizer (SP + 75% N) as compared to other treatments. Photosynthetic pigments and total soluble carbohydrate were improved significantly when CT was applied as soil drenching coupled with 75% of the recommended N dose (CT + 75% N). In this regard, a clear effect was noticed in terms of oil yield and fruit yield using SP and CT with a 75% N dose. It is concluded that using Spirulina platensis algae extract and compost tea as biostimulants coupled with only 75% of the recommended nitrogen fertilizer dose can be recommended for economical fennel production.
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Claims 4
Claim · model-written summary
Spirulina extract with 75% nitrogen significantly enhanced vegetative parameters and yield components compared with other treatments.
- Taxon
- Fennel
_-_Parc_Natural_de_s'Albufera%2C_Spain_2022-04-18_(02).jpg?width=60)
Anethum foeniculumt0 - Treatment
- SP as a foliar spray coupled with 75% of the recommended dose of nitrogen fertilizere0
- Outcome
- vegetative parameters, leaf number, branch number, shoot and bulb fresh weight, and shoot dry weighte0
- Direction
- enhancede0
- Comparator
- other treatmentse0
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“vegetative parameters, leaf number, branch number, shoot and bulb fresh weight, and shoot dry weight, as well as yield components such as 100-fruit weight and number of umbels per plant were significantly enhanced with application of SP as a foliar spray coupled with 75% of the recommended dose of nitrogen fertilizer (SP + 75% N) as compared to other treatments”
t0“Fennel Plants”
Claim · model-written summary
Compost tea with 75% nitrogen significantly improved photosynthetic pigments and soluble carbohydrate.
- Taxon
- FennelAnethum foeniculumt0
- Treatment
- CT was applied as soil drenching coupled with 75% of the recommended N dosee0
- Outcome
- Photosynthetic pigments and total soluble carbohydratee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic pigments and total soluble carbohydrate were improved significantly when CT was applied as soil drenching coupled with 75% of the recommended N dose”
t0“Fennel Plants”
Claim · model-written summary
Spirulina extract and compost tea with 75% nitrogen affected oil and fruit yield.
- Taxon
- FennelAnethum foeniculumt0
- Treatment
- SP and CT with a 75% N dosee0
- Outcome
- oil yield and fruit yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a clear effect was noticed in terms of oil yield and fruit yield using SP and CT with a 75% N dose”
t0“Fennel Plants”
Claim · model-written summary
The authors recommend Spirulina extract and compost tea with 75% nitrogen for economical fennel production.
- Taxon
- FennelAnethum foeniculumt0
- Treatment
- Spirulina platensis algae extract and compost tea as biostimulants coupled with only 75% of the recommended nitrogen fertilizer dosee0
- Outcome
- economical fennel productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“using Spirulina platensis algae extract and compost tea as biostimulants coupled with only 75% of the recommended nitrogen fertilizer dose can be recommended for economical fennel production”
t0“Fennel Plants”
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