Polysulphate trial shows impressive OSR results

33.6

Yield Increase
Polysulphate, an organic multi-nutrient fertiliser, increased the yield of oilseed rape by over 33%.

UK
2018

Trail

33.6

Yield Increase

Key Conclusions

In these results, Polysulphate increased the yield of oilseed rape by up to 33%, between 200 kg/ha and 1.15 t/ha (T2 gave the best results). When we look at the return after fertiliser costs have been deducted, we see that T1 gave an extra £62.94/ha, T2 gave an extra £291.70/ha, and T3 gave an extra £21.60/ha over the control.

Objective

In this trial we look at autumn and spring applications of sulphate to Winter Oilseed Rape (WOSR, Brassica napus), primarily looking at yield with different timings of sulphur. We investigate split applications of S, how this can help with establishment of the crop, and winter hardiness.

Trial Details

Trial station

UK

Crop

Oil Seed Rape

Product

Polysulphate®

Assessments

Yield

Treatments

We looked at 3 different rates of Polysulphate application onto winter oilseed rape (WOSR). The whole field had a base fertiliser of 250 kg/ha 0-20-30. T1, T3 and T4 (farm practice) received 96 kg/ha of SO3 in a single application. T2 received 2 applications of sulphate to the equivalent of 192 kg/ha of SO3, split 96 kg/ha at planting and 96 kg/ha early spring. All areas received 30 kg/ha of nitrogen at planting.

 

T1T2T3T4
Polysulphate 200 kg/ha
in the autumn
(at planting)
Polysulphate 200 kg/ha
in the autumn
(at planting)
Ammonium sulphate
applied to this area
Polysulphate 200 kg/ha
in the early spring
Polysulphate 200 kg/ha
in the early spring

 

Treatments

We looked at 3 different rates of Polysulphate application onto winter oilseed rape (WOSR). The whole field had a base fertiliser of 250 kg/ha 0-20-30. T1, T3 and T4 (farm practice) received 96 kg/ha of SO3 in a single application. T2 received 2 applications of sulphate to the equivalent of 192 kg/ha of SO3, split 96 kg/ha at planting and 96 kg/ha early spring. All areas received 30 kg/ha of nitrogen at planting.

 

T1T2T3T4
Polysulphate 200 kg/ha
in the autumn
(at planting)
Polysulphate 200 kg/ha
in the autumn
(at planting)
Ammonium sulphate
applied to this area
Polysulphate 200 kg/ha
in the early spring
Polysulphate 200 kg/ha
in the early spring

 

Results

The application of Polysulphate increased the yield in all cases. Autumn and spring application increased the yield by an extra 1.15 t/ha over the farm practice.

Polysulphate applied at 100 kg/ha resulted in an increase in oilseed rape yield of approximately 8%.

Polysulphate applied at 100 kg/ha resulted in an increase in oilseed rape yield of approximately 8%.

 

Other Interesting Trials

Cabbage & Polysulphate
Lincolnshire, UK, 2017
Trail

40

Yield Increase