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Copy link Polysulphate Peanut Trial in Vietnam
24
Binh Dinh Province, Vietnam 2016
24
Key Conclusions
The optimum treatment was achieved when Polysulphate was applied at 214 kg/ha. This increased the peanut yield to 2.86 t/ha, 24% more than the farmers’ practice, and produced a 98% increase in the net benefit to the farmer.
Objective
To evaluate the effects of potassium (K) and Polysulphate application rates on the agronomic and economic performance of peanut (Arachis hypogaea L.) for the growing conditions in the central coast of Vietnam.
Trial Details
Trial station
Binh Dinh Province, Vietnam
Product
Granular Polysulphate
Assessments
Yield; crop development; and soil tests before sowing and after harvest
Treatments
The experiment was set according to a randomized complete block design (RCBD) with 4 replications. Six fertilization treatments were tested: Farmers’ practice (FP) control, with N:P:K ratio of 95:40:100; NP-K0, with 45 kg N/ha, 90 kg P2O5/ha, and zero K; NP-K30; NP-K30-S1; NP-K60-S2; and NP-K90-S3.
All treatments were applied with similar N and P rates, K rates increasing from 30 to 90 kg K2O/ha, and Polysulphate at 107 (S1, 25 kg S/ha), 214 (S2, 50 kg S/ha), and 321 kg/ha (S3, 75 kg S/ha), respectively. Nitrogen was applied through urea and P through superphosphate. Potassium was applied through KCl and Polysulphate.
| Treatment | FYM | CaO | N | P2O5 | K2O from KCl | K2O from Polysulphate | S from Polysulphate | Polysulphate application rate |
|---|---|---|---|---|---|---|---|---|
| Mg/ha | kg/ha | kg/ha | kg/ha | kg/ha | kg/ha | kg/ha | kg/ha | |
| FP | 10 | 500 | 95 | 40 | 100 | 0 | 0 | - |
| NP-K0 | 10 | 500 | 45 | 90 | 0 | 0 | 0 | - |
| NP-K30 | 10 | 500 | 45 | 90 | 30 | 0 | 0 | - |
| NP-K30-S1 | 10 | 500 | 45 | 90 | 15 | 15 | 25 | 107 |
| NP-K60-S2 | 10 | 500 | 45 | 90 | 30 | 30 | 50 | 214 |
| NP-K90-S3 | 10 | 500 | 45 | 90 | 45 | 45 | 75 | 321 |
Treatments
The experiment was set according to a randomized complete block design (RCBD) with 4 replications. Six fertilization treatments were tested: Farmers’ practice (FP) control, with N:P:K ratio of 95:40:100; NP-K0, with 45 kg N/ha, 90 kg P2O5/ha, and zero K; NP-K30; NP-K30-S1; NP-K60-S2; and NP-K90-S3.
All treatments were applied with similar N and P rates, K rates increasing from 30 to 90 kg K2O/ha, and Polysulphate at 107 (S1, 25 kg S/ha), 214 (S2, 50 kg S/ha), and 321 kg/ha (S3, 75 kg S/ha), respectively. Nitrogen was applied through urea and P through superphosphate. Potassium was applied through KCl and Polysulphate.
| Treatment | FYM | CaO | N | P2O5 | K2O from KCl | K2O from Polysulphate | S from Polysulphate | Polysulphate application rate |
|---|---|---|---|---|---|---|---|---|
| Mg/ha | kg/ha | kg/ha | kg/ha | kg/ha | kg/ha | kg/ha | kg/ha | |
| FP | 10 | 500 | 95 | 40 | 100 | 0 | 0 | - |
| NP-K0 | 10 | 500 | 45 | 90 | 0 | 0 | 0 | - |
| NP-K30 | 10 | 500 | 45 | 90 | 30 | 0 | 0 | - |
| NP-K30-S1 | 10 | 500 | 45 | 90 | 15 | 15 | 25 | 107 |
| NP-K60-S2 | 10 | 500 | 45 | 90 | 30 | 30 | 50 | 214 |
| NP-K90-S3 | 10 | 500 | 45 | 90 | 45 | 45 | 75 | 321 |
Results
- FP and NP-K0 displayed the poorest performance in most parameters tested and obtained low peanut yield and benefit.
- The optimum treatment was achieved with NP-K60-S2 (214 kg Polysulphate/ha), which resulted in a yield of 2.86 t/ha of grains, 24% more than the farmers’ practice, and in a 98% increase in the net benefit to the farmer.
- Soil tests before sowing and after harvest indicated that while FP significantly reduced soil fertility, Polysulphate led to enhanced soil fertility.
Polysulphate significantly increased peanut yield by 24%, and net benefit by 98%.
From research funded by the International Potash Institute www.ipipotash.org.
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