PHOSPHORUS RELEASE PATTERN OF ROCK PHOSPHATE APPLIED AS P- FERTILIZER INCUBATED WITH AMENDMENTS IN VERTISOLS OF CENTRAL INDIA

S.K. SHARMA¹, N. CHOUHAN², V.P. SINGH³*, R.S. SIKARWAR^4
1Department of Soil Science & Agricultural Chemistry, College of Agriculture, Indore, Rajmata Vijayaraje Scindia Krishi Vishwavidyalaya, Gwalior, 474002, Madhya Pradesh
²Department of Soil Science & Agricultural Chemistry, College of Agriculture, Indore, Rajmata Vijayaraje Scindia Krishi Vishwavidyalaya, Gwalior, 474002, Madhya Pradesh
³Department of Soil Science & Agricultural Chemistry, College of Agriculture, Indore, Rajmata Vijayaraje Scindia Krishi Vishwavidyalaya, Gwalior, 474002, Madhya Pradesh
⁴Department of Soil Science & Agricultural Chemistry, College of Agriculture, Indore, Rajmata Vijayaraje Scindia Krishi Vishwavidyalaya, Gwalior, 474002, Madhya Pradesh
* Corresponding Author : vijaypratapsinghkushwah@gmail.com

Received : 06-09-2016     Accepted : 18-09-2016     Published : 01-11-2016
Volume : 8     Issue : 53       Pages : 2612 - 2615
Int J Agr Sci 8.53 (2016):2612-2615

Keywords : Jhabua rock phosphate, soil moisture regimes, Vertisols, Phosphorus release pattern, Industrial waste
Academic Editor : Dr G. D. Sharma
Conflict of Interest : None declared
Acknowledgements/Funding : None declared
Author Contribution : None declared

A pot experiment was conducted to determine the phosphorus release pattern of Jhabua Rock phosphate (JRP) in Vertisols, when it was applied with eighteen fertilizer treatments under three soil moisture regimes viz. 50% of field capacity (MR1), field capacity (MR2) and saturation (MR3). The result was found that JRP@120 kg P ha-1+PSB@ 150 g ha-1+FYM@5 t ha-1 with field capacity (F17 MR2) was the most effective treatment amongst all treatment combinations (61.52 kg P2O5 ha-1). The maximum release in available-P was obtained at 90 DAI in case of F17 (262%) and minimum in case of F2 (19%) over control. The trend of per cent change in cumulative in available-P release was F2 F10=F13