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Copy link Polysulphate Winter Cabbage Trial
40
Yield Increase
Winter Cabbage crops fertilised with Polysulphate responded with yield increases of 40% compared to the control plot.
Lincolnshire, UK 2017
40
Key Conclusions
In this trial in the UK, all the Polysulphate treatments showed a significant yield improvement over the control. The average yield of the Polysulphate treatments was 40% greater than the control.
Objective
To investigate the effect of Polysulphate application on the yield of winter cabbage (Brassica oleracea), with particular emphasis on response to the sulphur content.
Trial Details
Trial station
Lincolnshire, UK
Product
Polysulphate®
Assessments
Cabbage vigor and yield
Treatments
- The field trial consisted of 5 replicates.
- The whole field, including the trial site, received the standard NPK dressing used by the grower. No sulfur was applied.
- Four rates of Polysulphate were spread as a top-dressing to supply sulphur at 30, 60, 90 and 120 kg SO3/ha (12, 24, 36 and 48 kg S/ha).
- The control plots and the 3 lower S-rate plots received a dressing of calcined magnesite and muriate of potash (KCl) to match the quantities of magnesium and potassium provided by the highest Polysulphate application rate. The trial site was adequately supplied with calcium.
Treatments
- The field trial consisted of 5 replicates.
- The whole field, including the trial site, received the standard NPK dressing used by the grower. No sulfur was applied.
- Four rates of Polysulphate were spread as a top-dressing to supply sulphur at 30, 60, 90 and 120 kg SO3/ha (12, 24, 36 and 48 kg S/ha).
- The control plots and the 3 lower S-rate plots received a dressing of calcined magnesite and muriate of potash (KCl) to match the quantities of magnesium and potassium provided by the highest Polysulphate application rate. The trial site was adequately supplied with calcium.
Results
- The average vigour score for the Polysulphate plots was 90% or more throughout the winter, whereas the control plot vigour had declined to 74% by mid-autumn, subsequently remaining at that level.
- All the Polysulphate treatments showed a significant yield improvement over the control. The average yield of the Polysulphate treatments was 40% greater than the control.
- The optimum sulphur application rate was 90 kg SO3/ha (36 kg S/ha). This rate was achieved when Polysulphate was applied at 190 kg/ha.
The average yield of the Polysulphate treatments was 40% greater than the control.
Trial carried out by OAT (Oxford Agriculture Trials Ltd).
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