Abstract
Next to nitrogen, phosphorus, potassium and magnesium, sulphur plays an important role in plant metabolism and is considered to be one of the most important nutrients. As sulphur deficit in Polish soils has been increasing in the last few decades, research has been carried out in order to evaluate the impact of different sulphur rates and forms on the content of macroelements (N, P, K, Ca, Mg, S, Na) and their ratios in the Mila cultivar potato tubers. A strict, three-year field experiment was set up on Haplic Luvisol with acid reaction (5.3 pHKCl), mean richness in available forms of phosphorus, potassium and magnesium but low in sulphur. The field experiments involved the sulphur application in doses of 20 and 40 kg S kg-1 in the form of sulphate (VI) (K2SO4 and (NH4)2SO4) as well as in elemental form (Wigor S, containing 90% of pure sulphur and 10% of bentonite). Although potatoes represent the group of crops with low sulphur requirements, the research has clearly indicated that this component has definite impact on the content of macroelements in tubers. It was found that sulphur application, irrespective of its form and rate, compared with control sample generally increased the content of nitrogen, sulphur and magnesium in potato tubers, decreasing at the same time calcium content. The effect of the form of sulphur fertilisers on the content of macroelements was not univocal. The values of all the ratios calculated (K+:Mg+2, K+:(Ca+2+Mg+2) and (K++Na+ ):(Ca+2+Mg+2)), except for K+:Ca+2, have generally decreased after sulphur application, which indicates positive changes in the nutritive value of potato tubers.
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Claims 6
Claim · model-written summary
Sulphur application, irrespective of form and rate, generally increased nitrogen, sulphur and magnesium content in potato tubers compared with the control.
- Taxon
- potato
Solanum tuberosume0 - Organ / stage
- tuberse0
- Treatment
- sulphur applicatione0
- Outcome
- content of nitrogen, sulphur and magnesiume0
- Direction
- increasede0
- Comparator
- control samplee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sulphur application, irrespective of its form and rate, compared with control sample generally increased the content of nitrogen, sulphur and magnesium in potato tubers”
Claim · model-written summary
Sulphur application decreased calcium content in potato tubers compared with the control.
- Taxon
- potatoSolanum tuberosume0
- Organ / stage
- tuberse0
- Treatment
- sulphur applicatione1
- Outcome
- calcium contente0
- Direction
- decreasinge0
- Comparator
- control samplee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with control sample generally increased the content of nitrogen, sulphur and magnesium in potato tubers, decreasing at the same time calcium content”
e1“sulphur application, irrespective”
Claim · model-written summary
The effect of the form of sulphur fertiliser on macroelement content in potato tubers was not univocal.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberst0
- Treatment
- form of sulphur fertiliserse0
- Outcome
- content of macroelementse0
- Direction
- not univocale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tubers”
e0“The effect of the form of sulphur fertilisers on the content of macroelements was not univocal”
Claim · model-written summary
The K:Mg, K:(Ca+Mg) and (K+Na):(Ca+Mg) ratios in potato tubers generally decreased after sulphur application.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- sulphur applicatione0
- Outcome
- K+:Mg+2, K+:(Ca+2+Mg+2) and (K++Na+ ):(Ca+2+Mg+2)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tubers”
e0“The values of all the ratios calculated (K+:Mg+2, K+:(Ca+2+Mg+2) and (K++Na+ ):(Ca+2+Mg+2)), except for K+:Ca+2, have generally decreased after sulphur application”
Claim · model-written summary
The K:Ca ratio in potato tubers was an exception and did not generally decrease after sulphur application.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- sulphur applicatione0
- Outcome
- K+:Ca+2e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“potato tubers”
e0“The values of all the ratios calculated (K+:Mg+2, K+:(Ca+2+Mg+2) and (K++Na+ ):(Ca+2+Mg+2)), except for K+:Ca+2, have generally decreased after sulphur application”
Claim · model-written summary
The authors interpret the changes in ion ratios as positive changes in the nutritive value of potato tubers.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- positive changes in the nutritive value of potato tuberse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which indicates positive changes in the nutritive value of potato tubers”
The same questions in other papers
sulfur atom · molecular: metabolites · Solanum tuberosum (potato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.