Abstract
The effect of nitrogen (N), sulfur (S), and zinc (Zn) fertilization on the yield quantity and selected qualitative parameters of broccoli was studied in an experiment carried out in Nitra (Slovak Republic) during 2011 and 2012. In this experiment, the following fertilization treatments were tested: control; N200S80 (fertilized to the supply level: 200 kg N ha-1 and 80 kg S ha-1); N200S100 (supply level: 200 kg N ha-1 and 100 kg S ha-1), and N200S100 Zn (supply level: 200 kg N ha-1 and 100 kg S ha-1 + foliar zinc application). Compared to the control treatment, higher broccoli yield was shown at all fertilized treatments. The most significant increase in yield quantity was found at N200S100Zn, i.e. About 59% higher than the control. Application of N200S100Zn was the most suitable fertilization from the standpoint of broccoli quality. The foliar Zn spraying led to a statistically highly significant increase of sulforaphane in broccoli (about 41.1%) compared to the control. The applied N and S fertilization tended to decrease the vitamin C content in broccoli (about 9.2%) against the control. On the other hand, Zn application resulted in a return of the vitamin C content, nearly to its level in control. The results confirmed the well-known fact that nitrogen fertilization leads to nitrate accumulation in vegetables. However, the results of this research indicate that nitrogen fertilization combined with zinc application should be expressed mainly by lower nitrate accumulation in the edible parts of broccoli. The experimental data are interesting, and in terms of growing vegetables for consumption with enhanced quality, promising. This is notable because the formation of many serious diseases is increasing.
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Claims 8
Claim · model-written summary
All fertilized treatments increased broccoli yield relative to control.
- Taxon
- broccoli
Brassica oleracea var. italicae0 - Treatment
- all fertilized treatmentse0
- Outcome
- broccoli yielde0
- Direction
- highere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment, higher broccoli yield was shown at all fertilized treatments.”
Claim · model-written summary
N200S100Zn increased broccoli yield about 59% compared with control.
- Taxon
- broccoliBrassica oleracea var. italicae1
- Treatment
- N200S100Zne0
- Outcome
- yield quantitye0
- Direction
- highere0
- Value
- 59%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most significant increase in yield quantity was found at N200S100Zn, i.e. About 59% higher than the control.”
e1“broccoli yield”
Claim · model-written summary
N200S100Zn was judged most suitable for broccoli quality.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- N200S100Zne0
- Outcome
- most suitable fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of N200S100Zn was the most suitable fertilization from the standpoint of broccoli quality.”
Claim · model-written summary
Foliar zinc spraying significantly increased broccoli sulforaphane by about 41.1% versus control.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- foliar Zn sprayinge0
- Outcome
- sulforaphane in broccolie0
- Direction
- increasee0
- Value
- 41.1%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The foliar Zn spraying led to a statistically highly significant increase of sulforaphane in broccoli (about 41.1%) compared to the control.”
Claim · model-written summary
Nitrogen and sulfur fertilization tended to decrease broccoli vitamin C by about 9.2% versus control.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- N and S fertilizatione0
- Outcome
- vitamin C content in broccolie0
- Direction
- decreasee0
- Value
- 9.2%e0
- Qualifier
- tended toe0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The applied N and S fertilization tended to decrease the vitamin C content in broccoli (about 9.2%) against the control.”
Claim · model-written summary
Zinc application restored vitamin C content nearly to the control level.
- Taxon
- broccoliBrassica oleracea var. italicae1
- Treatment
- Zn applicatione0
- Outcome
- vitamin C contente0
- Direction
- returne0
- Qualifier
- nearly to its level in controle0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn application resulted in a return of the vitamin C content, nearly to its level in control.”
e1“vitamin C content in broccoli”
Claim · model-written summary
Nitrogen fertilization led to nitrate accumulation in vegetables.
- Taxon
- broccoliBrassica oleracea var. italicae1
- Treatment
- nitrogen fertilizatione0
- Outcome
- nitrate accumulatione0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen fertilization leads to nitrate accumulation in vegetables”
e1“nitrate accumulation in the edible parts of broccoli”
Claim · model-written summary
Adding zinc to nitrogen fertilization was associated with lower nitrate accumulation in edible broccoli parts.
- Taxon
- broccoliBrassica oleracea var. italicae0
- Treatment
- nitrogen fertilization combined with zinc applicatione0
- Outcome
- nitrate accumulation in the edible partse0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen fertilization combined with zinc application should be expressed mainly by lower nitrate accumulation in the edible parts of broccoli.”
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