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Copy link Polysulphate Pak Choi Trial in China
5.9
Liuzhuang village, Shangqiu City, Henan, China 2016
5.9
Key Conclusions
When comparing farmer’s practice with the addition of either SOP or Polysulphate, the application of Polysulphate resulted in increased plant height, leaf number per plant, single plant weight, and yield, increasing yield by 5.9%.
Objective
To evaluate the addition of Polysulphate and sulfate of potash (SOP) to the farmers’ practice on the yield and yield parameters of pak choi (Brassica rapa subsp. chinensis) crop grown in Henan Province, China.
Trial Details
Trial station
Liuzhuang village, Shangqiu City, Henan, China
Product
Granular Polysulphate
Assessments
Spread, number of leaves, height of plant, weight per plant, and yield
Treatments
The trial consisted of 3 treatments with 3 replications arranged in a random block design. The area of each plot was 30 m2. Sowing rate was 3 kg/ha, plant density in the field was 180,000 plants/ha.
- Farmers’ practice (FP): 600 kg/ha of 18-18-18 compound fertilizer as a base fertilizer
- Farmers’ practice (FP) + 750 kg/ha of SOP
- Farmers’ practice (FP) + 750 kg/ha of Polysulphate
| Treatment | NPK 18-18-18 | SOP | Polysulphate |
|---|---|---|---|
| kg/ha | kg/ha | kg/ha | |
| FP | 600 | - | - |
| FP+SOP | 600 | 750 | - |
| FP+Polysulphate | 600 | - | 750 |
Treatments
The trial consisted of 3 treatments with 3 replications arranged in a random block design. The area of each plot was 30 m2. Sowing rate was 3 kg/ha, plant density in the field was 180,000 plants/ha.
- Farmers’ practice (FP): 600 kg/ha of 18-18-18 compound fertilizer as a base fertilizer
- Farmers’ practice (FP) + 750 kg/ha of SOP
- Farmers’ practice (FP) + 750 kg/ha of Polysulphate
| Treatment | NPK 18-18-18 | SOP | Polysulphate |
|---|---|---|---|
| kg/ha | kg/ha | kg/ha | |
| FP | 600 | - | - |
| FP+SOP | 600 | 750 | - |
| FP+Polysulphate | 600 | - | 750 |
Results
The application of Polysulphate (T1) improved the biological characters of pak choi compared to pak choi grown according to farmers’ practice (T3).
The treatment receiving Polysulphate had:
- Increased number of leaves per plant by 0.7 leaf/plant
- Increased plant height by 1.7 cm
- Increased plant weight 12.9 g
| Number of leaves per plant | Height of plant | Weight per plant | |
|---|---|---|---|
| cm | g | ||
| FP | 7.9 | 20.6 | 143.8 |
| FP+SOP | 8.1 | 20.9 | 146.9 |
| FP+Polysulphate | 8.6 | 22.3 | 156.7 |
Polysulphate significantly increases pak choi yield by 5.9%.
Research Partner: Trial carried out in cooperation with the Soil and Fertilizer Station of Henan Province and the Land and Fertilizer Management station of Shangqiu City.
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