Author(s):

VN Patil, AA Patil, RB Pawar and AL Pharande

Abstract: The application of silicon through various sources has been in practice as a major component of integrated nutrient management for sustainable rice production. The beneficial effects of silicon fertilization on rice production has been described and quantified in numerous literature citations. The present investigation was carried out at Division of Soil Science and Agricultural Chemistry, College of Agriculture Kolhapur, India, to study the economic potential of silicon sources for sustainable rice production. The rice husk ash (RHA) and bagasse ash (BA) were used as source of silicon. The experiment was carried out in randomized block design consist of four levels of silicon (Si) viz. 0, 250, 500 and 750 kg Si ha^-1 which were supplied through rice husk ash and bagasse ash. The plant height (cm), number of tillers hill^-1, thousand grains weight (g) and dry matter hill^-1 (g) of rice increased significantly due to application of silicon. The application of silicon through bagasse ash @ 250 kg ha^-1 was found optimum for increase in the grain yield (49.66 q ha^-1) and straw yield (53.84 q ha^-1) of rice. The nitrogen, phosphorus, potassium and silicon uptake of rice increased significantly due to application of silicon through rice husk ash and bagasse ash. The highest benefit-cost ratio (1.52) was recorded with application of silicon @ 250 kg ha^-1 through bagasse ash.

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