Abstract
In a one-year vegetation pot experiment, we compared the effect of digestate from a biogas station and mineral fertilisers on yield and quality parameters of kohlrabi, variety Segura F1. Four treatments were used in the trial: 1) untreated control, 2) urea, 3) digestate, 4) urea, triple super phosphate, KCl, MgSO4. The N dose was the same in treatments 2-4, 1.5 g N/pot. In treatment 4 the P, K and Mg doses corresponded to those supplied in the digestate treatment (3).The weight of single kohlrabi bulbs in the unfertilised control was significantly lower (36.2%) than in the urea treatment (100%) and the other fertilised treatments. After application of digestate (treatment 3) and mineral fertilisers (treatment 4), the weight of single bulbs significantly increased by 36.2 and 33.6%, respectively, compared with the urea treatment (2). The content of ascorbic acid did not differ between the fertilised treatments (282-301 mg/kg), but was significantly lower than in the unfertilised control (334 mg/kg). There were significant differences between all fertilised treatments (2, 3, 4) in bulb nitrate content (745, 187, 462 mg NO3-/kg fresh matter, respectively). After digestate application the content decreased significantly, to 187 mg NO3-/kg fresh matter. The soil Nmin content after harvest varied between 4.19-5.79 mg/kg in all fertilised treatments and the N-NH4+ form prevailed over N-NO3- only in the digestate treatment (3.45/2.34 mg/kg). We recommend the use of digestate to kohlrabi as it results in comparable or better yield and qualitative parameters of kohlrabi compared with mineral fertilizers.
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Claims 10
Claim · model-written summary
Unfertilised kohlrabi control had significantly lower single bulb weight (36.2%) than the urea treatment.
- Taxon
- kohlrabi
Brassica oleracea var. gongylodest0 - Material
- Segura F1e0
- Treatment
- unfertilised controle1
- Outcome
- weight of single kohlrabi bulbse1
- Direction
- lowere1
- Value
- 36.2%e1
- Comparator
- urea treatmente1
- Setting
- vegetation pot experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e1“The weight of single kohlrabi bulbs in the unfertilised control was significantly lower (36.2%) than in the urea treatment (100%)”
e0“In a one-year vegetation pot experiment, we compared the effect of digestate from a biogas station and mineral fertilisers on yield and quality parameters of kohlrabi, variety Segura F1”
Claim · model-written summary
Digestate application significantly increased single bulb weight by 36.2% compared with the urea treatment.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- digestatee2
- Outcome
- weight of single bulbse2
- Direction
- increasede2
- Value
- 36.2e2
- Comparator
- urea treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e2“After application of digestate (treatment 3) and mineral fertilisers (treatment 4), the weight of single bulbs significantly increased by 36.2 and 33.6%, respectively, compared with the urea treatment (2)”
Claim · model-written summary
Mineral fertiliser application significantly increased single bulb weight by 33.6% compared with the urea treatment.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- mineral fertiliserse2
- Outcome
- weight of single bulbse2
- Direction
- increasede2
- Value
- 33.6%e2
- Comparator
- urea treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e2“After application of digestate (treatment 3) and mineral fertilisers (treatment 4), the weight of single bulbs significantly increased by 36.2 and 33.6%, respectively, compared with the urea treatment (2)”
Claim · model-written summary
Fertilised treatments had significantly lower ascorbic acid content (282-301 mg/kg) than the unfertilised control (334 mg/kg).
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- fertilised treatmentse3
- Outcome
- content of ascorbic acide3
- Direction
- lowere3
- Value
- 282-301 mg/kge3
- Qualifier
- 334 mg/kge3
- Comparator
- unfertilised controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e3“The content of ascorbic acid did not differ between the fertilised treatments (282-301 mg/kg), but was significantly lower than in the unfertilised control (334 mg/kg)”
Claim · model-written summary
Ascorbic acid content did not differ between the fertilised treatments.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- fertilised treatmentse3
- Outcome
- content of ascorbic acide3
- Qualifier
- did not differ between the fertilised treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e3“The content of ascorbic acid did not differ between the fertilised treatments (282-301 mg/kg), but was significantly lower than in the unfertilised control (334 mg/kg)”
Claim · model-written summary
Bulb nitrate content differed significantly among all fertilised treatments.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- fertilised treatmentse4
- Outcome
- bulb nitrate contente4
- Qualifier
- 745, 187, 462 mg NO3-/kg fresh matter, respectivelye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e4“There were significant differences between all fertilised treatments (2, 3, 4) in bulb nitrate content (745, 187, 462 mg NO3-/kg fresh matter, respectively)”
Claim · model-written summary
Digestate application significantly decreased bulb nitrate content to 187 mg NO3-/kg fresh matter.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- digestatee5
- Outcome
- bulb nitrate contente4
- Direction
- decreasede5
- Value
- 187 mg NO3-/kg fresh mattere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e4“There were significant differences between all fertilised treatments (2, 3, 4) in bulb nitrate content (745, 187, 462 mg NO3-/kg fresh matter, respectively)”
e5“After digestate application the content decreased significantly, to 187 mg NO3-/kg fresh matter”
Claim · model-written summary
Soil Nmin content after harvest ranged from 4.19 to 5.79 mg/kg in all fertilised treatments.
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- fertilised treatmentse6
- Outcome
- soil Nmin contente6
- Value
- 4.19-5.79 mg/kge6
- Qualifier
- after harveste6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e6“The soil Nmin content after harvest varied between 4.19-5.79 mg/kg in all fertilised treatments”
Claim · model-written summary
N-NH4+ form prevailed over N-NO3- in soil only in the digestate treatment (3.45/2.34 mg/kg).
- Taxon
- kohlrabiBrassica oleracea var. gongylodest0
- Treatment
- digestate treatmente7
- Outcome
- N-NH4+ form prevailed over N-NO3-e7
- Value
- 3.45/2.34 mg/kge7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“mineral fertilization of kohlrabi”
e7“the N-NH4+ form prevailed over N-NO3- only in the digestate treatment (3.45/2.34 mg/kg)”
Claim · model-written summary
Digestate is recommended for kohlrabi because it gives comparable or better yield and quality than mineral fertilizers.
- Taxon
- kohlrabiBrassica oleracea var. gongylodese0
- Treatment
- digestatee0
- Outcome
- yield and qualitative parameterse0
- Comparator
- mineral fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We recommend the use of digestate to kohlrabi as it results in comparable or better yield and qualitative parameters of kohlrabi compared with mineral fertilizers”
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