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Copy link Polysulphate® Mustard Trial in India
Seed Yield Increase
Kanpur, Uttar Pradesh, India 2014
Seed Yield Increase
Key Conclusions
Polysulphate fertilizer significantly increases mustard seed yield by up to 35%, and the mustard oil yield by up to 39% compared to the control.
Objective
To test the efficacy of Polysulphate as a sulfur source on the performance of mustard (Brassica juncea) crops in India.
Trial Details
Trial station
Kanpur, Uttar Pradesh, India
Crop
Mustard
Product
Standard Polysulphate 0-0-13
Assessments
Yield, yield components, oil content, and nutrient uptake
Treatments
The experiment was laid out in a randomized block design with 3 replicates and included 6 treatments:
- T1: Control without S and K fertilization (100% NP through urea and DAP only)
- T2: 100% NPK (urea, DAP, Muriate of Potash (MOP))
- T3: 100% NP + 50% S through Polysulphate (20 kg S/ha) (balanced K through MOP to make 100% K)
- T4: 100% NP + 75% S through Polysulphate (30 kg S/ha) (balanced K through MOP to make 100% K)
- T5: 100% NP + 100% S through Polysulphate (40 kg S/ha) (balanced K through MOP to make 100% K)
- T6: 100% NPK (urea, DAP, MOP) + 100% S through gypsum (40 kg S/ha).
The recommended dose of fertilizers: 120 kg N, 60 kg P2O5, 60 kg K2O/ha and 40 kg S/ha was applied according to the treatments. The full dose of P, K, and S and a half dose of N were applied at the time of sowing as a basal application. The remaining half dose of N was applied in 2 equal splits.
| Treatment | N | P | K | S | Source of fertilizer | |
|---|---|---|---|---|---|---|
| kg/ha | kg/ha | kg/ha | kg/ha | |||
| T1 | NP 100% | 120 | 60 | 0 | 0 | Urea and DAP |
| T2 | NPK (control) | 120 | 60 | 60 | 0 | Urea, DAP, and MOP |
| T3 | NPKS20 Polysulphate | 120 | 60 | 60 | 20 | Urea, DAP, MOP, and Polysulphate |
| T4 | NPKS30 Polysulphate | 120 | 60 | 60 | 30 | Urea, DAP, MOP, and Polysulphate |
| T5 | NPKS40 Polysulphate | 120 | 60 | 60 | 40 | Urea, DAP, MOP, and Polysulphate |
| T6 | NPK 100S40 gypsum | 120 | 60 | 60 | 40 | Urea, DAP, MOP, and gypsum |
Treatments
The experiment was laid out in a randomized block design with 3 replicates and included 6 treatments:
- T1: Control without S and K fertilization (100% NP through urea and DAP only)
- T2: 100% NPK (urea, DAP, Muriate of Potash (MOP))
- T3: 100% NP + 50% S through Polysulphate (20 kg S/ha) (balanced K through MOP to make 100% K)
- T4: 100% NP + 75% S through Polysulphate (30 kg S/ha) (balanced K through MOP to make 100% K)
- T5: 100% NP + 100% S through Polysulphate (40 kg S/ha) (balanced K through MOP to make 100% K)
- T6: 100% NPK (urea, DAP, MOP) + 100% S through gypsum (40 kg S/ha).
The recommended dose of fertilizers: 120 kg N, 60 kg P2O5, 60 kg K2O/ha and 40 kg S/ha was applied according to the treatments. The full dose of P, K, and S and a half dose of N were applied at the time of sowing as a basal application. The remaining half dose of N was applied in 2 equal splits.
| Treatment | N | P | K | S | Source of fertilizer | |
|---|---|---|---|---|---|---|
| kg/ha | kg/ha | kg/ha | kg/ha | |||
| T1 | NP 100% | 120 | 60 | 0 | 0 | Urea and DAP |
| T2 | NPK (control) | 120 | 60 | 60 | 0 | Urea, DAP, and MOP |
| T3 | NPKS20 Polysulphate | 120 | 60 | 60 | 20 | Urea, DAP, MOP, and Polysulphate |
| T4 | NPKS30 Polysulphate | 120 | 60 | 60 | 30 | Urea, DAP, MOP, and Polysulphate |
| T5 | NPKS40 Polysulphate | 120 | 60 | 60 | 40 | Urea, DAP, MOP, and Polysulphate |
| T6 | NPK 100S40 gypsum | 120 | 60 | 60 | 40 | Urea, DAP, MOP, and gypsum |
Results
- Mustard yield increased significantly and steadily in response to the increasing S dose applied through Polysulphate (T3-T5).
- Mustard seed yield at the maximum S dose, 40 kg/ha applied with Polysulphate (T5), increased by 35% compared with zero S application (T2).
- The response of oil yield to Polysulphate application was dramatic, providing a 39% increase in oil (T5 vs. T2). Sulfur applied through gypsum (T6) also gave rise to a significant increase in oil yield, although to a lesser extent than Polysulphate.
- Yield components like pods per plant, pod length, seeds per pod, and seed weight were highest at the maximum S level (T5).
- K and S uptake by mustard crop increased with increasing S dose applied through Polysulphate (T3-T5).
Polysulphate significantly increases mustard seed yield by up to 35%.
From research funded by the International Potash Institute www.ipipotash.org.
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