GROWTH ANALYSIS OF BASMATI RICE VARIETIES AND ITS IMPACT ON GRAIN YIELD UNDER SRI
A field experiment was conducted during the kharif season of 2007 and 2008 at OUAT, Bhubaneswar to study the response of basmati rice varieties to system of rice intensification (SRI). The results showed that use of organic manure (FYM 15.0 t ha-1) improved growth attributes like plant height, tillering, dry matter accumulation, LAI and CGR of basmati rice varieties and produced high grain (4.42 t ha-1) yield comparable to those of INM (50% RDF+7.5 t FYM ha-1), but significantly greater than those of inorganic fertilization (RDF). Pusa Basmati-1 performed better than Geetanjali. Similarly, crop planted at close spacing (20cm × 20 cm) recorded higher growth attributes and greater grain yield than those of wide spacing (25cm × 25 cm). The growth attributes and grain yield did not vary much between the crops planted with 10 and 15-day old seedlings. Positive and significant correlations between grain yield and dry matter accumulation, LAI and CGR at different growth stages showed their strong and positive impact on grain yield of basmati rice.