Open AccessPotassium nutrition in rice: A review
Author(s) -
S Vijayakumar,
Dinesh Kumar,
K. Ramesh,
Prabhu Govindasamy,
Dinesh Jinger,
Rubina Khanam,
P. Saravanane,
E. Subramanian,
Ekta Joshi,
VK Sharma,
Sudhir Kumar Rajpoot
Publication year - 2021
Publication title -
oryza
Language(s) - English
Resource type - Journals
eISSN - 2249-5266
pISSN - 0474-7615
DOI - 10.35709/ory.2021.58.3.1
Subject(s) - agronomy , cropping , agriculture , fertilizer , nexus (standard) , lakh , potassium , nutrient , crop , cultivar , environmental science , cropping system , sowing , biology , chemistry , ecology , organic chemistry , computer science , embedded system
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 lakhsamples 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.