Abstract
Nitrogen (N) fertilization is essential for obtaining high garlic yields and satisfying commercial requirements for bulb diameter. However, excess nitrogen may favor the development of lateral shoots. This study aimed to examine the effect of different N application strategies on garlic yield and quality. The experiment was conducted in the field using garlic cv. Chonan and four N fertilization strategies (T1, N fertilizer applied at 15-day intervals; T2, N fertilizer applied before and after clove differentiation; T3, N fertilizer applied before clove differentiation; and T4, N fertilizer applied after clove differentiation). All treatments received the same N rate (210 kg ha-1). A single N application before clove differentiation (T3) favored lateral shoot growth, resulting in the highest incidence of this defect (11.66%). The other treatments did not differ in lateral shoot incidence. Four classes (3–6) of bulb diameter were observed, with treatments ranked in decreasing order as T2 > T1 > T3 > T4. There were no significant differences in garlic yield between single N application treatments (T3 and T4). However, garlic yield differed by 73% between T1 (13,329 kg ha-1) and T4 (7,679 kg ha-1), by 55.31% between T2 (11,927 kg ha-1) and T4, and by 36% between T1 and T3 (9,783 kg ha-1). These results indicate that two N fertilization strategies can be adopted in high-quality garlic production: fortnightly N fertilization or split N application before and after clove differentiation. A single N application is not recommended, regardless of application timing, as it promotes lateral shoot growth and reduces garlic quality and yield.
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Claims 10
Claim · model-written summary
A single nitrogen application before clove differentiation produced the highest lateral shoot incidence, 11.66%.
- Taxon
- garlic
Allium sativumt0 - Treatment
- A single N application before clove differentiation (T3)e0
- Outcome
- incidence of this defecte0
- Direction
- higheste0
- Value
- 11.66%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic”
e0“A single N application before clove differentiation (T3) favored lateral shoot growth, resulting in the highest incidence of this defect (11.66%).”
Claim · model-written summary
Other nitrogen treatments did not differ in lateral shoot incidence.
- Taxon
- garlicAllium sativumt0
- Outcome
- lateral shoot incidencee0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic”
e0“The other treatments did not differ in lateral shoot incidence.”
Claim · model-written summary
Bulb diameter classes ranked T2 above T1, T3 and T4.
- Taxon
- garlicAllium sativumt0
- Outcome
- bulb diametere0
- Direction
- decreasinge0
- Qualifier
- T2 > T1 > T3 > T4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic”
e0“Four classes (3–6) of bulb diameter were observed, with treatments ranked in decreasing order as T2 > T1 > T3 > T4.”
Claim · model-written summary
Garlic yield did not significantly differ between T3 and T4.
- Taxon
- garlicAllium sativume0
- Treatment
- T3e0
- Outcome
- garlic yielde0
- Direction
- no significant differencese0
- Comparator
- T4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no significant differences in garlic yield between single N application treatments (T3 and T4).”
Claim · model-written summary
T1 garlic yield was 73% higher than T4.
- Taxon
- garlicAllium sativume0
- Treatment
- T1e0
- Outcome
- garlic yielde0
- Direction
- differede0
- Value
- 73%e0
- Qualifier
- 13,329 kg ha-1e0
- Comparator
- T4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“garlic yield differed by 73% between T1 (13,329 kg ha-1) and T4 (7,679 kg ha-1)”
Claim · model-written summary
T2 garlic yield was 55.31% higher than T4.
- Taxon
- garlicAllium sativumt0
- Treatment
- T2e0
- Outcome
- garlict0
- Value
- 55.31%e0
- Qualifier
- 11,927 kg ha-1e0
- Comparator
- T4e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic”
e0“by 55.31% between T2 (11,927 kg ha-1) and T4”
Claim · model-written summary
T1 garlic yield was 36% higher than T3.
- Taxon
- garlicAllium sativumt0
- Treatment
- T1e0
- Outcome
- garlict0
- Value
- 36%e0
- Qualifier
- 9,783 kg ha-1e0
- Comparator
- T3e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“garlic”
e0“by 36% between T1 and T3 (9,783 kg ha-1)”
Claim · model-written summary
The authors recommend fortnightly nitrogen fertilization for high-quality garlic production.
- Taxon
- garlicAllium sativume0
- Outcome
- fortnightly N fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two N fertilization strategies can be adopted in high-quality garlic production: fortnightly N fertilization or split N application before and after clove differentiation”
Claim · model-written summary
The authors recommend split nitrogen application before and after clove differentiation for high-quality garlic production.
- Taxon
- garlicAllium sativume0
- Outcome
- split N application before and after clove differentiatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two N fertilization strategies can be adopted in high-quality garlic production: fortnightly N fertilization or split N application before and after clove differentiation”
Claim · model-written summary
The authors recommend against a single nitrogen application regardless of timing.
- Taxon
- garlicAllium sativume0
- Outcome
- A single N application is not recommendede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single N application is not recommended, regardless of application timing, as it promotes lateral shoot growth and reduces garlic quality and yield.”
The same questions in other papers
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1 paper in the same direction as this paper · 2 in the opposite direction
- positive
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nitrogen · disease · Allium sativum (garlic)Positive and negative results
2 in the opposite direction
- positive
- positive
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.