Polysulphate Cotton Trial in Turkey

12.5

Fiber elongation increase
Polysulphate fertilizer is a soluble, easily-absorbed, cost-effective answer to crop nutrition, containing four key plant nutrients: sulphur, potassium, magnesium and calcium.

Antalya, Turkey
2016

Trail

12.5

Fiber elongation increase

Key Conclusions

Trial shows seed cotton yield was significantly increased by all 3 K sources. The yield of the Polysulphate treatments was 77% greater than the control without K application. Yields of Polysulphate and SOP treatments were significantly the same.

Objective

To investigate the effect of Polysulphate, potassium sulphate (SOP) and potassium chloride (MOP, KCl) on the yield and quality parameters of cotton.

Trial Details

Trial station

Antalya, Turkey

Crop

Cotton

Product

Standard Polysulphate

Assessments

Yield and fiber elongation.

Treatments

This randomized trial consisted of four replicates with four treatments. Nitrogen, phosphorus and potassium were applied according to target yield and soil tests at a rate of:

  • 250 kg N ha-1 (as ammonium nitrate and diammonium phosphate, DAP)
  • 184 kg P2O5 ha-1 (as diammonium phosphate, DAP)
  • 210 kg K2O ha-1 (as Polysulphate, SOP, or MOP)

Control treatment received the same N and P doses but no K was applied.

Treatments

This randomized trial consisted of four replicates with four treatments. Nitrogen, phosphorus and potassium were applied according to target yield and soil tests at a rate of:

  • 250 kg N ha-1 (as ammonium nitrate and diammonium phosphate, DAP)
  • 184 kg P2O5 ha-1 (as diammonium phosphate, DAP)
  • 210 kg K2O ha-1 (as Polysulphate, SOP, or MOP)

Control treatment received the same N and P doses but no K was applied.

Results

  • Polysulphate application increased the net return and was very profitable, with a B:C (benefit:cost ratio) of 9.2.
  • The highest fiber elongation was found in the Polysulphate treated cottons. This is one of the most important physical parameters for cotton quality.

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