Abstract
In a greenhouse pot experiment with kohlrabi, variety Luna, we explored the joint effect of N (0.6 g N per pot = 6 kg of soil) and S in the soil (25-35-45 mg kg-1 of S) on yields, on N, S and NO3- content in tubers and leaves, and on alterations in the amino acids concentration in the tubers. S fertilisation had no effect on tuber yields. The ranges of N content in tubers and leaves were narrow (between 1.42-1.48 % N and 1.21-1.35 % N, respectively) and the effect of S fertilisation was insignificant. S concentration in the tubers ranged between 0.59 and 0.64 % S. S fertilisation had a more pronounced effect on the S concentration in leaf tissues where it increased from 0.50 to 0.58 or to 0.76 % S under the applied dose. The NO3- content was higher in tubers than in leaves. Increasing the S level in the soil significantly reduced NO3- concentrations in the tubers by 42.2-53.6 % and in the leaves by 8.8-21.7 %. Increasing the S content in the soil reduced the concentration of cysteine + methionine by 16-28 %. The values of valine, tyrosine, aspartic acid and serine were constant. In the S0, S1, and S2 treatments the levels of threonine, isoleucine, leucine, arginine, the sum of essential amino acids and alanine decreased from 37 to 9 %. The histidine concentration increased with increasing S fertilisation. S fertilisation of kohlrabi can be recommended to stabilize the yield and reduce the undesirable NO3- contained in the parts used for consumption.
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Claims 13
Claim · model-written summary
Sulfur fertilization had no effect on kohlrabi tuber yield.
- Taxon
- kohlrabi
Brassica oleracea var. gongylodest0 - Treatment
- S fertilisatione0
- Outcome
- tuber yieldse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S fertilisation had no effect on tuber yields.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Sulfur fertilization had an insignificant effect on nitrogen content in tubers and leaves.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- S fertilisatione0
- Outcome
- N content in tubers and leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ranges of N content in tubers and leaves were narrow (between 1.42-1.48 % N and 1.21-1.35 % N, respectively) and the effect of S fertilisation was insignificant.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Sulfur concentration in tubers ranged from 0.59 to 0.64%.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Outcome
- S concentration in the tuberse0
- Value
- 0.59 and 0.64 % Se0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S concentration in the tubers ranged between 0.59 and 0.64 % S.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Sulfur fertilization increased sulfur concentration in leaf tissue.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- S fertilisatione0
- Outcome
- S concentration in leaf tissuese0
- Direction
- increasede0
- Value
- 0.50 to 0.58 or to 0.76 % Se0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S fertilisation had a more pronounced effect on the S concentration in leaf tissues where it increased from 0.50 to 0.58 or to 0.76 % S under the applied dose.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Nitrate content was higher in tubers than leaves.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Organ / stage
- tuberse0
- Outcome
- NO3- contente0
- Direction
- highere0
- Comparator
- leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NO3- content was higher in tubers than in leaves.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Increasing soil sulfur significantly reduced tuber nitrate concentration by 42.2-53.6%.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- Increasing the S level in the soile0
- Outcome
- NO3- concentrations in the tuberse0
- Direction
- reducede0
- Value
- 42.2-53.6 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the S level in the soil significantly reduced NO3- concentrations in the tubers by 42.2-53.6 % and in the leaves by 8.8-21.7 %.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Increasing soil sulfur significantly reduced leaf nitrate concentration by 8.8-21.7%.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- Increasing the S level in the soile0
- Outcome
- in the leavese0
- Direction
- reducede0
- Value
- 8.8-21.7 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the S level in the soil significantly reduced NO3- concentrations in the tubers by 42.2-53.6 % and in the leaves by 8.8-21.7 %.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Increasing soil sulfur reduced cysteine plus methionine concentration by 16-28%.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- Increasing the S content in the soile0
- Outcome
- concentration of cysteine + methioninee0
- Direction
- reducede0
- Value
- 16-28 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the S content in the soil reduced the concentration of cysteine + methionine by 16-28 %.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Valine, tyrosine, aspartic acid and serine concentrations remained constant.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Outcome
- values of valine, tyrosine, aspartic acide0
- Direction
- constante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The values of valine, tyrosine, aspartic acid and serine were constant.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Threonine, isoleucine and leucine levels decreased by 37 to 9% across S0, S1 and S2 treatments.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- S0, S1, and S2 treatmentse0
- Outcome
- levels of threonine, isoleucine, leucinee0
- Direction
- decreasede0
- Value
- 37 to 9 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the S0, S1, and S2 treatments the levels of threonine, isoleucine, leucine, arginine, the sum of essential amino acids and alanine decreased from 37 to 9 %.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Arginine, total essential amino acids and alanine decreased across S0, S1 and S2 treatments.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- S0, S1, and S2 treatmentse0
- Outcome
- arginine, the sum of essential amino acids and alaninee0
- Direction
- decreasede0
- Value
- 37 to 9 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the S0, S1, and S2 treatments the levels of threonine, isoleucine, leucine, arginine, the sum of essential amino acids and alanine decreased from 37 to 9 %.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
Histidine concentration increased with sulfur fertilization.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- increasing S fertilisatione0
- Outcome
- histidine concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The histidine concentration increased with increasing S fertilisation.”
t0“kohlrabi (Brassica oleracea, L.)”
Claim · model-written summary
The authors recommend sulfur fertilization to stabilize yield and reduce nitrate in edible kohlrabi parts.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- S fertilisatione0
- Outcome
- stabilize the yield and reduce the undesirable NO3-e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S fertilisation of kohlrabi can be recommended to stabilize the yield and reduce the undesirable NO3- contained in the parts used for consumption.”
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