Abstract
The vegetation pot experiment with kohlrabi (Moravia variety) was established in 2014 and 2015. The experiment included four treatments of fertilization: (1) untreated control, (2) digestate, (3) digestate + Mg + S, and (4) digestate + S. Treatments 2–4 were fertilized with the same N dose. Differences between the years were recorded in all parameters. Compared with the variant with digestate (100%), the kohlrabi yield of the unfertilized variant was demonstrably lower in both years (33.1% and 46.9%). Digestate enriched with the fertilizer containing Mg + S (treatment 3) demonstrably increased the yield of kohlrabi by 10.2% and 15.7% compared with pure digestate (treatment 2). Digestate enriched with the fertilizer containing elementary S (treatment 4) demonstrably increased the yield of kohlrabi (by 7.4%) only in 2015 compared with pure digestate (treatment 2). Except for the year 2015, there were no yield differences between variants 3 and 4. In both years, the lowest content of nitrates in kohlrabi was observed in the unfertilized control (135 and 163 mg NO3−/kgFM, respectively). Following the application of digestate (treatment 2), the content of nitrates (mg NO3−/kgFM) increased to 327 in 2014 and to 509 in 2015. The addition of fertilizers with Mg + S as well as fertilizer with elementary S to the digestate (treatment 3 and 4) significantly reduced the content of nitrates to 295–301 mg NO3−/kgFM (2014) and to 449–468 mg NO3−/kgFM (2015). The content of ascorbic acid did not statistically differ among the four treatments in the two years (268–281 and 311–329 mg/kgFM in 2014 and 2015, respectively). Digestate supplemented with Mg + S (magnesium sulfate) or only with elementary S can be recommended for kohlrabi fertilization prior to the planting in order to reduce dangerous accumulations of nitrates in kohlrabi.
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Claims 13
Claim · model-written summary
All measured parameters differed between years.
- Taxon
- Kohlrabi
Brassica oleracea var. gongylodest0 - Outcome
- all parameterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Differences between the years were recorded in all parameters.”
t0“Kohlrabi”
Claim · model-written summary
Unfertilized kohlrabi yielded 33.1% and 46.9% of the digestate reference across the two years.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- unfertilizede0
- Outcome
- kohlrabi yielde0
- Direction
- lowere0
- Value
- 33.1% and 46.9%e0
- Qualifier
- 100%e0
- Comparator
- digestatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the variant with digestate (100%), the kohlrabi yield of the unfertilized variant was demonstrably lower in both years (33.1% and 46.9%).”
Claim · model-written summary
Mg + S enriched digestate increased yield by 10.2% and 15.7% relative to pure digestate.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- Digestate enriched with the fertilizer containing Mg + Se0
- Outcome
- yield of kohlrabie0
- Direction
- increasede0
- Value
- 10.2% and 15.7%e0
- Comparator
- pure digestatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digestate enriched with the fertilizer containing Mg + S (treatment 3) demonstrably increased the yield of kohlrabi by 10.2% and 15.7% compared with pure digestate (treatment 2).”
Claim · model-written summary
Elementary S enriched digestate increased yield by 7.4% only in 2015.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- Digestate enriched with the fertilizer containing elementary Se0
- Outcome
- yield of kohlrabie0
- Direction
- increasede0
- Value
- 7.4%e0
- Qualifier
- only in 2015e0
- Comparator
- pure digestatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digestate enriched with the fertilizer containing elementary S (treatment 4) demonstrably increased the yield of kohlrabi (by 7.4%) only in 2015 compared with pure digestate (treatment 2).”
Claim · model-written summary
Treatments 3 and 4 had no yield differences except in 2015.
- Taxon
- KohlrabiBrassica oleracea var. gongylodest0
- Treatment
- 3e0
- Outcome
- yielde0
- Direction
- no yield differencese0
- Qualifier
- Except for the year 2015e0
- Comparator
- 4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Except for the year 2015, there were no yield differences between variants 3 and 4.”
t0“Kohlrabi”
Claim · model-written summary
The unfertilized control had the lowest nitrate content, 135 and 163 mg NO3−/kgFM.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- unfertilized controle0
- Outcome
- content of nitratese0
- Direction
- loweste0
- Value
- 135 and 163 mg NO3−/kgFMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years, the lowest content of nitrates in kohlrabi was observed in the unfertilized control (135 and 163 mg NO3−/kgFM, respectively).”
Claim · model-written summary
Digestate increased nitrate content to 327 in 2014.
- Taxon
- KohlrabiBrassica oleracea var. gongylodest0
- Treatment
- application of digestatee0
- Outcome
- content of nitrates (mg NO3−/kgFM)e0
- Direction
- increasede0
- Value
- 327e0
- Qualifier
- 2014e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following the application of digestate (treatment 2), the content of nitrates (mg NO3−/kgFM) increased to 327 in 2014 and to 509 in 2015.”
t0“Kohlrabi”
Claim · model-written summary
Digestate increased nitrate content to 509 in 2015.
- Taxon
- KohlrabiBrassica oleracea var. gongylodest0
- Treatment
- application of digestatee0
- Outcome
- content of nitrates (mg NO3−/kgFM)e0
- Direction
- increasede0
- Value
- 509e0
- Qualifier
- 2015e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following the application of digestate (treatment 2), the content of nitrates (mg NO3−/kgFM) increased to 327 in 2014 and to 509 in 2015.”
t0“Kohlrabi”
Claim · model-written summary
Adding Mg + S fertilizer to digestate significantly reduced nitrate content.
- Taxon
- KohlrabiBrassica oleracea var. gongylodest0
- Treatment
- addition of fertilizers with Mg + Se0
- Outcome
- content of nitratese0
- Direction
- reducede0
- Value
- 295–301 mg NO3−/kgFMe0
- Qualifier
- 449–468 mg NO3−/kgFM (2015)e0
- Comparator
- digestatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of fertilizers with Mg + S as well as fertilizer with elementary S to the digestate (treatment 3 and 4) significantly reduced the content of nitrates to 295–301 mg NO3−/kgFM (2014) and to 449–468 mg NO3−/kgFM (2015).”
t0“Kohlrabi”
Claim · model-written summary
Adding elementary S fertilizer to digestate significantly reduced nitrate content.
- Taxon
- KohlrabiBrassica oleracea var. gongylodest0
- Treatment
- fertilizer with elementary Se0
- Outcome
- content of nitratese0
- Direction
- reducede0
- Value
- 295–301 mg NO3−/kgFMe0
- Qualifier
- 449–468 mg NO3−/kgFM (2015)e0
- Comparator
- digestatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of fertilizers with Mg + S as well as fertilizer with elementary S to the digestate (treatment 3 and 4) significantly reduced the content of nitrates to 295–301 mg NO3−/kgFM (2014) and to 449–468 mg NO3−/kgFM (2015).”
t0“Kohlrabi”
Claim · model-written summary
Ascorbic acid content did not significantly differ among four treatments in either year.
- Taxon
- KohlrabiBrassica oleracea var. gongylodest0
- Outcome
- content of ascorbic acide0
- Direction
- did not statistically differe0
- Value
- 268–281 and 311–329 mg/kgFMe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of ascorbic acid did not statistically differ among the four treatments in the two years (268–281 and 311–329 mg/kgFM in 2014 and 2015, respectively).”
t0“Kohlrabi”
Claim · model-written summary
Mg + S supplemented digestate is recommended before planting to reduce nitrate accumulation.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- Digestate supplemented with Mg + S (magnesium sulfate)e0
- Outcome
- kohlrabi fertilization prior to the plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digestate supplemented with Mg + S (magnesium sulfate) or only with elementary S can be recommended for kohlrabi fertilization prior to the planting in order to reduce dangerous accumulations of nitrates in kohlrabi.”
Claim · model-written summary
Elementary S supplemented digestate is recommended before planting to reduce nitrate accumulation.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- elementary Se0
- Outcome
- kohlrabi fertilization prior to the plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Digestate supplemented with Mg + S (magnesium sulfate) or only with elementary S can be recommended for kohlrabi fertilization prior to the planting in order to reduce dangerous accumulations of nitrates in kohlrabi.”
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