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Copy link Polysulphate Winter oilseed rape Trial in China
42
Hubei 2023
42
Key Conclusions
The application of 1,500 kg/ha of Polysulphate increased the oilseed rape yield by 42% compared to the control in this trial in China.
Objective
To investigate the effect of increasing rates of Polysulphate on the yield, yield components and nutrient uptake of winter oilseed rape.
Trial Details
Trial station
Hubei
Crop
Oilseed Rape
Product
Polysulphate®
Assessments
Yield, Yield Components, Nutrient uptake
Treatments
This randomized block trial consisted of four replicates with six treatments. In all treatments, nitrogen, phosphorus and boron were applied according to farmers’ traditional practice: 180 kg N/ha, 75 kg P2O5/ha and 1 kg B/ha. Five treatments consisted of increasing rates of Polysulphate: 375, 750, 1,125, 1,500 and 1,875 kg/ha.
The control treatment received the same N, P and B application but no Polysulphate was applied.
Treatments
This randomized block trial consisted of four replicates with six treatments. In all treatments, nitrogen, phosphorus and boron were applied according to farmers’ traditional practice: 180 kg N/ha, 75 kg P2O5/ha and 1 kg B/ha. Five treatments consisted of increasing rates of Polysulphate: 375, 750, 1,125, 1,500 and 1,875 kg/ha.
The control treatment received the same N, P and B application but no Polysulphate was applied.
Results
- All nutrients (N, P, K, S, Ca and Mg) uptake in shoots increased in the Polysulphate treatments when compared to the control. The highest nutrient uptake was obtained when Polysulphate was applied at a rate of 1,500 kg/ha.
- All three yield components (pods per plant, seeds per pot and 1000-seed weight) increased significantly with Polysulphate application, up to a dose of 1,500 kg/ha.
- Polysulphate application increased significantly the yield. The highest yield was obtained when Polysulphate was applied at a rate of 1,500 kg/ha.
| Polysulphate (kg/ha) | N | P2O5 | K | S | Mg | Ca |
|---|---|---|---|---|---|---|
| Shoot uptake (kg/ha) |
||||||
| 0 | 83.1 d | 7.5 d | 100.5 e | 29.3 e | 12.2 e | 36.9 e |
| 375 | 105.1 c | 11.5 c | 170.5 d | 51.8 d | 15.9 d | 54.2 d |
| 750 | 115.1 ab | 11.9 ab | 255.2 c | 66.6 bc | 18.3 bc | 66.8 bc |
| 1,125 | 110.6 bc | 12.0 bc | 286.6 b | 72.0 ab | 19.1 b | 72.3 ab |
| 1,500 | 120.0 a | 13.0 a | 320.4 a | 77.1 a | 20.8 a | 76.9 a |
| 1,875 | 112.2 abc | 12.3 abc | 298.7 ab | 64.6 c | 17.3 c | 64.1 c |
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