IPI International Potash Institute
IPI International Potash Institute

Scientific abstracts

Title:
Impact of Low Potassium Fertilization on Potassium Transformation under Different Crop Management Systems in Western Plain of Arid India
Authors:
Sunil Kumar, I.J. Gulati, S.R. Yadav, R.S. Yadav, P.C. Moharana, R.L. Meena, B.L. Tailor, and R.S. Singh
Published in:
Journal of Plant Nutrition 41(4):411-424 (2018), English

Abstract:

Acquaintance of potassium (K) transformation in soil is crucial for K management in management system of arid India. Present study revealed that the extractable K like ammonium acetate-potassium (NH4OAc-K), nitric acid (HNO3)-K, and hydrochloric acid (HCl)-K under different systems were followed the order: irrigated low input > rainfed low input > irrigated high input > no input. The pearl millet systems in irrigated low input practice maintained a higher NH4OAc-K than irrigated high input practice. The exchangeable-K (Exch-K), non-exchangeable-K (Non-exch K) and lattice-K were observed highest in irrigated low input system and lowest in no input system. It is noticed that Exch-K contributed 2.3-2.6% over total-K, which readily available to plants. The Exch-K was highly significant correlated with K pools and soil properties, indicating that rapid establishment of equilibrium between the pools. Thus, knowing K reserve and distribution of K forms can help in understanding K replenishment capacity of arid soil under long-term intensive cultivation.

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