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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2019, Volume : 7, Issue : 1
First page : (260) Last page : (266)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7311

Site Specific Nutrient Management for Rice in Alkali Soils of Tamil Nadu

S. Ravichandran¹ and S. Saravanakumar²*

¹Scientist, HBSS, Rubber Board, Kabada, Karnataka
²Scientist (Agronomy), ICAR – KVK, MYRADA, Erode District
*Corresponding Author E-mail: agrisarwan@gmail.com
Received: 25.12.2018  |  Revised: 29.01.2019   |  Accepted: 7.02.2019  

 ABSTRACT

A field experiment was conducted in alkali soils of A.D. Agricultural College and Research Institute farm Tiruchirappalli, Tamil Nadu, in wet season (September to January) of 2006-07 and 2007-08 to study the effect of amendments viz., gypsum and distillery spentwash (DSW) and nutrient omission plots on yield, nutrient use efficiency and fertilizer N, P and K requirement of rice. In both years, reclamation of alkali soils with DSW recorded the highest grain yield of 6.58 Mg ha-1 followed by gypsum @ 50% GR (5.94 Mg ha-1). Among the nutrient omission plots, application of recommended dose of NPK (RDN) recorded significantly higher rice grain yield of 6.98 Mg ha-1. In DSW reclaimed alkali soils, N limiting yield was 6.79 and 6.33 Mg ha-1 during first and second year respectively which were 43 and 36 per cent higher than gypsum reclamation. But the effect of amendment on P limiting yield during the second year and K limiting yield on both years were not significant. The N, P and K requirement to produce one tonne of rice grain varied between 17. 3 to 25.5, 3.9 to 4.9 and 21.7 to 56.5 kg Mg-1 of grain respectively. For a yield target of 7.0 Mg ha-1, the mean fertilizer N requirement was higher under no amendment followed by gypsum and DSW reclamation. The mean fertilizer P2O5 requirement was 30 per cent less than RDN while mean fertilizer K2O requirement was 60 per cent higher than RDN.

Key words: Distillery spent wash for reclamation, fertilizer requirement of rice, Site Specific Nutrient Management

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Ravichandran, S. and Saravanakumar, S., Site Specific Nutrient Management for Rice in Alkali Soils of Tamil Nadu, Int. J. Pure App. Biosci.7(1): 260-266 (2019). doi: http://dx.doi.org/10.18782/2320-7051.7311