Abstract
The most important active compound in garlic is alliin. Sulfur (S) fertilization was shown to significantly increase the alliin concentration in garlic cloves, while high nitrogen (N) levels had an adverse effect. The effect of graded N and S application on the storage life of garlic has been paid little attention so far. A bifactorial field trial with 4 levels of N and S was conducted in a randomized block design. At harvest, 40 bulbs per treatment were stored under terms comparable to the storage conditions in average households (20 °C, dry, and dim) for 83 days. Every 3 weeks, samples were analyzed for their alliin and water content. The alliin concentration in peeled garlic cloves increased during storage from on average 9.2 mg g(-1) dry weight at harvest to 21.4 mg g(-1) dry weight after 83 days of storage. S fertilization increased the alliin concentration by a factor of 2.3 from 11.4 mg g(-1) in the control treatment to 26.6 mg g(-1) dry weight at the highest S level of 45 kg ha(-1) after 83 days of storage. N fertilization decreased by a trend of the alliin content. Fertilizer rates had only a minor influence on water losses from bulbs at short-term storage. After 83 days of storage, water losses were by trend lower at higher S levels, and this relationship proved to be significant when no N was applied. Best quality in terms of high alliin contents was obtained during the entire storage time at an S level of at minimum 30 kg ha(-1) S if no N was applied. The results show that the physiological S demand of 15 kg ha(-1) S for optimum yield is lower than the S requirement of 30 kg ha(-1) S for a longer storage life.
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Claims 8
Claim · model-written summary
Alliin concentration in garlic cloves rose from 9.2 to 21.4 mg g(-1) dry weight over 83 days of storage.
- Taxon
- garlic
Allium sativume0 - Organ / stage
- peeled garlic clovese0
- Outcome
- alliin concentratione0
- Direction
- increasede0
- Value
- 21.4 mg g(-1) dry weighte0
- Qualifier
- 83 days of storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The alliin concentration in peeled garlic cloves increased during storage from on average 9.2 mg g(-1) dry weight at harvest to 21.4 mg g(-1) dry weight after 83 days of storage.”
Claim · model-written summary
Sulfur fertilization raised alliin concentration 2.3-fold relative to control after 83 days.
- Taxon
- garlicAllium sativume1
- Treatment
- highest S level of 45 kg ha(-1)e0
- Outcome
- alliin concentratione0
- Direction
- increasede0
- Value
- 26.6 mg g(-1) dry weighte0
- Qualifier
- after 83 days of storagee0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S fertilization increased the alliin concentration by a factor of 2.3 from 11.4 mg g(-1) in the control treatment to 26.6 mg g(-1) dry weight at the highest S level of 45 kg ha(-1) after 83 days of storage.”
e1“The alliin concentration in peeled garlic cloves”
Claim · model-written summary
Nitrogen fertilization tended to decrease alliin content.
- Taxon
- garlicAllium sativume1
- Treatment
- N fertilizatione0
- Outcome
- alliin contente0
- Direction
- decreasede0
- Qualifier
- by a trende0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilization decreased by a trend of the alliin content.”
e1“The alliin concentration in peeled garlic cloves”
Claim · model-written summary
Fertilizer rates had only a minor effect on short-term bulb water loss.
- Taxon
- garlicAllium sativume1
- Treatment
- Fertilizer ratese0
- Outcome
- water losses from bulbse0
- Qualifier
- short-term storagee0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer rates had only a minor influence on water losses from bulbs at short-term storage.”
e1“The alliin concentration in peeled garlic cloves”
Claim · model-written summary
At 83 days, bulb water loss tended lower with higher sulfur levels.
- Taxon
- garlicAllium sativume1
- Treatment
- higher S levelse0
- Outcome
- water lossese0
- Direction
- lowere0
- Qualifier
- by trende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 83 days of storage, water losses were by trend lower at higher S levels”
e1“The alliin concentration in peeled garlic cloves”
Claim · model-written summary
The lower water loss at higher sulfur was significant without nitrogen.
- Taxon
- garlicAllium sativume1
- Treatment
- higher S levelse0
- Outcome
- water lossese0
- Direction
- lowere0
- Qualifier
- when no N was appliede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water losses were by trend lower at higher S levels, and this relationship proved to be significant when no N was applied.”
e1“The alliin concentration in peeled garlic cloves”
Claim · model-written summary
At least 30 kg ha(-1) sulfur without nitrogen produced the best alliin quality throughout storage.
- Taxon
- garlicAllium sativume1
- Treatment
- at minimum 30 kg ha(-1) Se0
- Outcome
- high alliin contentse0
- Direction
- highe0
- Qualifier
- if no N was appliede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Best quality in terms of high alliin contents was obtained during the entire storage time at an S level of at minimum 30 kg ha(-1) S if no N was applied.”
e1“The alliin concentration in peeled garlic cloves”
Claim · model-written summary
Sulfur requirement for longer storage life was 30 kg ha(-1), above the 15 kg ha(-1) physiological demand for optimum yield.
- Taxon
- garlicAllium sativume1
- Outcome
- S requiremente0
- Direction
- lowere0
- Value
- 30 kg ha(-1) Se0
- Qualifier
- 15 kg ha(-1) S for optimum yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the physiological S demand of 15 kg ha(-1) S for optimum yield is lower than the S requirement of 30 kg ha(-1) S for a longer storage life.”
e1“The alliin concentration in peeled garlic cloves”
The same questions in other papers
sulfur atom · molecular: metabolites · Allium sativum (garlic)Positive and negative results
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- positive
- positive
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See all 14 papers →fertilization · molecular: metabolites · Allium sativum (garlic)Positive and negative results
3 papers in the same direction as this paper · 16 in the opposite direction
- positive
- positive
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See all 20 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.