Potassium nutrition in rice: A review
2021
S, Vijayakumar | Kumar, Dinesh | Ramesh, Kulasekaran | Govindasamy, Prabhu | Jinger, Dinesh | Khanam, Rubina | P, Saravanane | E, Subramanian | Joshi, Ekta | Sharma, VK | Rajpoot, Sudhir K
Potassium (K) is the most neglected nutrient in Indian agriculture and accounts only 10% of the total fertilizer use. The increased cropping intensity and use of high yielding cultivars since the green revolution led to heavy withdrawal of K from soil. Persistent K mining over the past six decades has mined soil K level in many cultivated areas and continuously transforming sufficiency into deficiency. A recent soil test a little over 1 lakh samples from 33 states of India have categorized 41.1%, 29.3%, and 29.5% of soil samples as low, medium and high in available K respectively. Further, the trend of soil available K status showed a persistent decline in percentage of area under high and medium soil K. Consequently, the evidence of rice crop responding to K nutrition is increased. This review attempts the nexus of K nutrition in rice for devising strategies for potassium management in rice-based cropping systems in the country.
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