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 SO42− 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
Kelpak had no relevant effect on the studied soil enzyme activities.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napust0 - Treatment
- biostimulante0
- Outcome
- activity of the enzymes studiede0
- Direction
- no relevant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“There was found no relevant effect of biostimulant on the activity of the enzymes studied”
t0“oilseed rape”
Claim · model-written summary
Soil arylsulphatase activity increased with low soil sulphates during ripening.
- Taxon
- oilseed rapeBrassica napust0
- Organ / stage
- ripening the rapee0
- Outcome
- activity of arylsulphatasee0
- Direction
- increasese0
- Qualifier
- low sulphates content in soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With a low sulphates content in soil during ripening the rape, the activity of arylsulphatase increases”
t0“oilseed rape”
Claim · model-written summary
High NPK increased soil SO42− content by 27-42% compared with lower NPK rates.
- Taxon
- oilseed rapeBrassica napust0
- Treatment
- highest rate of NPKe0
- Outcome
- content of SO42− in soile0
- Direction
- increasee0
- Value
- 27-42%e0
- Comparator
- NPK fertilization at lower ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest rate of NPK resulted in a 27-42% increase in the content of SO42− in soil as compared with the soil sampled from NPK fertilization at lower rates”
t0“oilseed rape”
Claim · model-written summary
Sulphur recovery efficiency increased with higher NPK fertilization.
- Taxon
- oilseed rapeBrassica napust0
- Treatment
- higher NPK fertilizatione0
- Outcome
- Sulphur recovery efficiencye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sulphur recovery efficiency from fertilizer with S elemental increased for higher NPK fertilization”
t0“oilseed rape”
Claim · model-written summary
Biostimulant application can compensate for low NPK cultivation through improved fertilizer sulfur use.
- Taxon
- oilseed rapeBrassica napuse0
- Outcome
- Biostimulant application can compensate for a low level of oilseed rape crops cultivation technologye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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
NPK and sulfur fertilization should be coordinated at suitable rates for high sulfur recovery.
- Taxon
- oilseed rapeBrassica napuse0
- Outcome
- correlate the management of NPK and S fertilization at the right ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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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