Abstract
Potatoes are an important staple food with high yield potential and great nutritional value. Potassium (K) fertilisation can increase both tuber yield and quality, but its effects differ depending on the K fertilisation form. Potatoes are known to be chloride sensitive, since chloride ions can influence, for example, the starch content. Therefore, fertilisations shortly before planting using potassium sulphate (K 2 SO 4 ) are often recommended instead of potassium chloride (KCl). However, the use of different fertilisation forms is contradictory, and the chloride sensitivity of potatoes remains unclear. To examine this issue in more detail, a 2-year field experiment using two cultivars, “Laura” and “Marabel,” was conducted. K fertilisation with 240 kg K 2 O as K 2 SO 4 and KCl was applied, and the control remained unfertilised. Quality traits, including internal and external parameters, were analysed after harvest and after 5 months of storage at 6°C. The results revealed minor effects on yield, but the starch content and ascorbic acid concentration were reduced due to the KCl supply. Furthermore, the reducing sugar concentration in tubers increased during storage more after KCl compared to K 2 SO 4 fertilisation. Moreover, volatile compounds were affected by the K fertilisation form, with higher levels of lipid-derived off-flavour compounds after KCl application. However, the effects of cultivation year, cultivar, and storage interacted with the influence of the fertilisation form. In summary, KCl fertilisation can disadvantageously influence several quality traits, but the use of potato cultivars should also be considered when recommending fertilisers.
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Claims 7
Claim · model-written summary
Potassium fertilizer form had minor effects on potato yield.
- Taxon
- Potatoes
Solanum tuberosume1 - Treatment
- KCle2
- Outcome
- yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed minor effects on yield”
e1“Potatoes are an important staple food”
e2“K fertilisation with 240 kg K 2 O as K 2 SO 4 and KCl was applied”
Claim · model-written summary
KCl reduced potato tuber starch content.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- KCl supplye0
- Outcome
- starch contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch content and ascorbic acid concentration were reduced due to the KCl supply”
e1“Potatoes are an important staple food”
Claim · model-written summary
KCl reduced potato tuber ascorbic acid concentration.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- KCl supplye0
- Outcome
- ascorbic acid concentratione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“starch content and ascorbic acid concentration were reduced due to the KCl supply”
e1“Potatoes are an important staple food”
Claim · model-written summary
Reducing sugars increased more during storage after KCl than potassium sulphate.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- KCle0
- Outcome
- reducing sugar concentration in tuberse0
- Direction
- increasede0
- Qualifier
- during storagee0
- Comparator
- K 2 SO 4 fertilisatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing sugar concentration in tubers increased during storage more after KCl compared to K 2 SO 4 fertilisation”
e1“Potatoes are an important staple food”
Claim · model-written summary
KCl produced higher lipid derived off flavour compounds.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- KCl applicatione0
- Outcome
- lipid-derived off-flavour compoundse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher levels of lipid-derived off-flavour compounds after KCl application”
e1“Potatoes are an important staple food”
Claim · model-written summary
Cultivation year, cultivar, and storage interacted with fertilizer form effects.
- Taxon
- PotatoesSolanum tuberosume1
- Treatment
- fertilisation forme0
- Outcome
- influence of the fertilisation forme0
- Qualifier
- cultivation year, cultivar, and storagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of cultivation year, cultivar, and storage interacted with the influence of the fertilisation form”
e1“Potatoes are an important staple food”
Claim · model-written summary
The authors advise considering potato cultivars when recommending fertilizers.
- Taxon
- PotatoesSolanum tuberosume1
- Outcome
- use of potato cultivars should also be considered when recommending fertiliserse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of potato cultivars should also be considered when recommending fertilisers”
e1“Potatoes are an important staple food”
The same questions in other papers
potassium chloride · molecular: metabolites · Solanum tuberosum (potato)Positive and negative results
1 in the opposite direction
- positive
potassium chloride · quality: sugar starch · Solanum tuberosum (potato)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- negative
- no effect
- positive
1 paper more in this group
See all 5 papers →potassium chloride · quality: phytochemicals · Solanum tuberosum (potato)Results agree
1 paper in the same direction as this paper
- negative
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.