Abstract
Abstract BACKGROUND Soil fertility is a major concern during vegetable production. Conventional versus organic fertilization has been studied in order to conserve soil properties. While some reports point out an increase in food nutritional properties, the loss of crop yield under organic conditions continues to be a problem. Thus, an experiment with broccoli in the field was carried out, comparing crop management under conventional fertilization (CF) and two soil amendment treatments: manure pellet (M) and an enriched‐biochar (EB) supplemented by an organic fertilizer (AND) applied alone (M + CF; EB+AND) or in combination (M + EB + AND). Crop yield and the nutritional properties in the flowering heads (mineral content, phenolic compounds and glucosinolates (GSLs)), were determined. RESULTS Enriched‐biochar and manure as a standalone amendment resulted in higher crop yield regarding CF, but not when they were applied in combination. The number of flowering heads with no‐commercial characteristics was lower after enriched‐biochar soil application. Finally, enriched‐biochar treatment enhanced NO 3 − , PO 4 3− and SO 4 2− levels in the flowering heads, and some of the ion contents can be associated with mineral changes in the soil after the biochar amendment. Also, the contents of phenolic compounds and indole GSLs were higher after enriched‐biochar application compared with the other treatments, GSL increase being due to the higher percentage of sulfur in the plant rather that an adequate N/S ratio. CONCLUSION Application of enriched‐biochar amendment in the cultivation of broccoli is appropriate, since there are no losses of yield and an increase in nutritional compounds in the flowering heads. © 2022 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Claims 9
Claim · model-written summary
Enriched-biochar alone gave higher broccoli crop yield than conventional fertilization.
- Taxon
- broccoli
Brassica oleracea var. italicat0 - Treatment
- Enriched‐biochare1
- Outcome
- crop yielde1
- Direction
- highere1
- Comparator
- conventional fertilizatione2
- Setting
- fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e1“Enriched‐biochar and manure as a standalone amendment resulted in higher crop yield regarding CF, but not when they were applied in combination”
e2“an experiment with broccoli in the field was carried out, comparing crop management under conventional fertilization (CF) and two soil amendment treatments: manure pellet (M)”
Claim · model-written summary
Manure pellet alone gave higher broccoli crop yield than conventional fertilization.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- manure pellete2
- Outcome
- crop yielde1
- Direction
- highere1
- Comparator
- conventional fertilizatione2
- Setting
- fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e1“Enriched‐biochar and manure as a standalone amendment resulted in higher crop yield regarding CF, but not when they were applied in combination”
e2“an experiment with broccoli in the field was carried out, comparing crop management under conventional fertilization (CF) and two soil amendment treatments: manure pellet (M)”
Claim · model-written summary
Combined manure and enriched-biochar application did not increase broccoli crop yield over conventional fertilization.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- M + EB + ANDe3
- Outcome
- crop yielde1
- Direction
- no_changeinferrede1
- Comparator
- conventional fertilizatione2
- Setting
- fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e1“Enriched‐biochar and manure as a standalone amendment resulted in higher crop yield regarding CF, but not when they were applied in combination”
e2“an experiment with broccoli in the field was carried out, comparing crop management under conventional fertilization (CF) and two soil amendment treatments: manure pellet (M)”
e3“applied alone (M + CF; EB+AND) or in combination (M + EB + AND)”
Claim · model-written summary
Enriched-biochar application lowered the number of flowering heads with non-commercial characteristics in broccoli.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- enriched‐biochar soil applicatione4
- Outcome
- flowering heads with no‐commercial characteristicse4
- Direction
- lowere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e4“The number of flowering heads with no‐commercial characteristics was lower after enriched‐biochar soil application”
Claim · model-written summary
Enriched-biochar treatment increased NO3-, PO4 3- and SO4 2- levels in broccoli flowering heads.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- enriched‐biochar treatmente5
- Outcome
- NO 3 − , PO 4 3− and SO 4 2− levelse5
- Direction
- enhancede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e5“enriched‐biochar treatment enhanced NO 3 − , PO 4 3− and SO 4 2− levels in the flowering heads”
Claim · model-written summary
Some ion contents in broccoli heads may be associated with mineral changes in the soil after biochar amendment.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- biochar amendmente6
- Outcome
- ion contentse6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e6“some of the ion contents can be associated with mineral changes in the soil after the biochar amendment”
Claim · model-written summary
Phenolic compounds and indole glucosinolates were higher in broccoli after enriched-biochar application than with the other treatments.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Treatment
- enriched‐biochar applicatione7
- Outcome
- contents of phenolic compounds and indole GSLse7
- Direction
- highere7
- Comparator
- the other treatmentse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e7“the contents of phenolic compounds and indole GSLs were higher after enriched‐biochar application compared with the other treatments”
Claim · model-written summary
The GSL increase in broccoli is attributed to a higher sulfur percentage in the plant rather than to an adequate N/S ratio.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Compound
- sulfure7
- Outcome
- GSL increasee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e7“GSL increase being due to the higher percentage of sulfur in the plant rather that an adequate N/S ratio”
Claim · model-written summary
The authors recommend enriched-biochar amendment in broccoli cultivation because yield is not lost and nutritional compounds increase.
- Taxon
- broccoliBrassica oleracea var. italicat0
- Outcome
- Application of enriched‐biochar amendment in the cultivation of broccolie6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“broccoli”
e6“Application of enriched‐biochar amendment in the cultivation of broccoli is appropriate, since there are no losses of yield and an increase in nutritional compounds in the flowering heads”
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- no effect
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See all 496 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.