Abstract
Purpose Besides nitrogen, phosphorus and potassium, sulphur is nowadays considered fundamental for plants, and due to its deficit in many regions, should be provided to crops by fertilization. The enzymes, rhodanese and arylsulphatase, take part in transforming sulphur in soil. Material and methods The seaweed biostimulant Kelpak (auxins 11 mg l ⁻¹ and cytokinins 0.031 mg l ⁻¹) was applied to increase the uptake and accumulation of sulphur affecting the yield of oilseed rape cv. ‘Chagall’. Field experiments were conducted in Poland (53°N.18°E), in Alfisol (USDA) over 2010–2013. In the experiment, the nitrogen, potassium and phosphorus rate applied was as follows: high: 180 N, 70 P, 132 K [kg ha ⁻¹] or low: 144 N, 35 P, 66 K [kg ha ⁻¹], fertilization rate with elemental S (36 or 0 kg ha ⁻¹) and with biostimulant (Kelpak 2 l ha ⁻¹ in autumn and 2 l ha ⁻¹ in spring) or without it. Results There was found no relevant effect of biostimulant on the activity of the enzymes studied. With a low sulphates content in soil during ripening the rape, the activity of arylsulphatase increases. The highest rate of NPK resulted in a 27-42% increase in the content of SO ₄²⁻ in soil as compared with the soil sampled from NPK fertilization at lower rates. Sulphur recovery efficiency from fertilizer with S elemental increased for higher NPK fertilization. Conclusions Biostimulant application can compensate for a low level of oilseed rape crops cultivation technology (low rates of NPK fertilization) by improving the use of S from a fertilizer. In growing oilseed rape, it is essential to correlate the management of NPK and S fertilization at the right rate for a high sulphur recovery efficiency.
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Claims 6
Claim · model-written summary
Biostimulant application had no relevant effect on the activity of the soil enzymes studied in oilseed rape fields.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Treatment
- biostimulante2
- Gene
- rhodanese and arylsulphatasee4
- Outcome
- activity of the enzymes studiede2
- Direction
- no relevant effecte2
- Comparator
- without ite3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e1“oilseed rape”
e2“There was found no relevant effect of biostimulant on the activity of the enzymes studied”
e3“or without it”
e4“The enzymes, rhodanese and arylsulphatase, take part in transforming sulphur in soil”
Claim · model-written summary
With low sulphate content in soil during ripening, arylsulphatase activity in oilseed rape fields increased.
- Taxon
- oilseed rapeBrassica napuse1
- Organ / stage
- ripeninge2
- Treatment
- low sulphates content in soile2
- Outcome
- activity of arylsulphatasee2
- Direction
- increasese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“oilseed rape”
e2“With a low sulphates content in soil during ripening the rape, the activity of arylsulphatase increases”
Claim · model-written summary
The highest NPK rate increased soil sulphate content by 27-42% in oilseed rape fields compared with lower NPK rates.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- highest rate of NPKe2
- Outcome
- content of SO ₄²⁻ in soile2
- Direction
- increasee2
- Value
- 27-42%e2
- Comparator
- NPK fertilization at lower ratese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“oilseed rape”
e2“The highest rate of NPK resulted in a 27-42% increase in the content of SO ₄²⁻ in soil as compared with the soil sampled from NPK fertilization at lower rates”
Claim · model-written summary
Sulphur recovery efficiency from S elemental fertilizer increased with higher NPK fertilization in oilseed rape.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- higher NPK fertilizatione2
- Outcome
- Sulphur recovery efficiency from fertilizer with S elementale2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“oilseed rape”
e2“Sulphur recovery efficiency from fertilizer with S elemental increased for higher NPK fertilization”
Claim · model-written summary
Biostimulant application improved the use of fertilizer S in oilseed rape grown with low NPK rates.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- Biostimulant applicatione2
- Outcome
- use of S from a fertilizere2
- Direction
- improvinge2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“oilseed rape”
e2“Biostimulant application can compensate for a low level of oilseed rape crops cultivation technology (low rates of NPK fertilization) by improving the use of S from a fertilizer”
Claim · model-written summary
The authors recommend correlating NPK and S fertilization management at the right rate for high sulphur recovery efficiency in oilseed rape.
- Taxon
- oilseed rapeBrassica napuse1
- Outcome
- management of NPK and S fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“oilseed rape”
e2“In growing oilseed rape, it is essential to correlate the management of NPK and S fertilization at the right rate for a high sulphur recovery efficiency”
The same questions in other papers
other · physiology: enzyme activity · Brassica napus (oilseed rape)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.