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Copy link Polysulphate trial shows impressive OSR results
33.6
UK 2018
33.6
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.
| T1 | T2 | T3 | T4 |
|---|---|---|---|
| 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.
| T1 | T2 | T3 | T4 |
|---|---|---|---|
| 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%.
Other Interesting Trials
Cabbage & Polysulphate
Lincolnshire, UK, 2017
40
