Polysulphate helps keep cabbage the king of vegetables in Turkey

17 June 2019

Polysulphate helps keep cabbage the king of vegetables in Turkey

Research in Turkey into various fertilizer treatments for cabbages has revealed the important contribution that Polysulphate applied before planting can make to quality and marketable yield of this highly-valued crop.

Understanding cabbage nutrient requirements

Cabbage is one of the most popular vegetables in Turkey. With production lagging behind demand, researchers at Turkey’s Ege University and Bati Akdeniz Agricultural Research Institute, supported by the International Potash Institute (IPI), wanted to investigate what crop nutrition, aside from nitrogen and phosphorus, is required to enhance yield and quality especially when potassium and sulphur are so key to crop performance.

The research team carried out an extensive field study, “Effect of Different Potassium and Sulfate Fertilizer Types on Cabbage Yield and Quality” in a southern region of Turkey in order to establish what crop nutrition strategies, with three different potassium sources, yield the best results.

Measuring for maximum performance

The results show that while a muriate of potash (MOP) application significantly enhanced cabbage crop performance, the addition of sulphur – either as Polysulphate or sulphate of potash (SOP) – improved yield and quality even further. The best result was from a treatment of Polysulphate with SOP, giving a marketable yield of cabbages from that trial plot 60% higher than the control. In addition, that treatment resulted in larger cabbage heads and better nutritional – and eating – quality.

This kind of research signposts the versatility of Polysulphate: used alone or combined with other products in a targeted strategy. It is already proving useful for helping to develop crop nutrition strategy advice for Turkish farmers wanting to enhance their cabbage enterprises.

More information is available in the full research report.