Role of Different forms of Potassium in Plant Metabolism


Although a significant plant nutrient and essential to plant metabolism, potassium has received little attention in Indian agriculture. Potassium is categorised as a macronutrient since plants need a lot of it to flourish. Potassium levels in soil have decreased during the past several decades as a result of fertiliser applications that are primarily nitrogen and phosphoric. To fully understand the interactions between N, P, and K fertilisers, further research on nitrogen and phosphoric fertiliser optimization is necessary. Potassium shortage is a significant issue nowadays since it strengthens the plant defence system. Instead of using fertilisers, potassium can be added to the soil by using effluents, such as waste water from an olive oil mill. These effluents directly increase the soil’s exchangeable potassium, however this increase is less than that caused by K fertilisers. Potassium levels in soil and subsoil may have decreased as a result of leaching losses and greater absorption by crop plants, which resulted in soil loss during crop harvest. The existing application method for potassium fertiliser does not take soil K condition or plant need into account, which either limits crop production or causes K mining by crop plants. In intensive agriculture, a lower potassium content causes a progressive decline in production. Therefore, in order to maintain a constant state of production and enhance the level of output, fertiliser application must be done after understanding the current amount of potassium in the soil by a soil analysis for accessible potassium.

Author(s) Details:

N. B. Misal,
Department of Soil Science and Agricultural Chemistry, School of Agricultural Sciences and Technology, Narsee Monjee Institute of Management Studies, Shirpur, Maharashtra- 425 405, India.

Narendra Singh,
Department of Soil Science, Navsari Agricultural University, Navsari-396 450, India.

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Keywords: Exchangeable potassium, mineral potassium, total potassium, water soluble potassium.

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