Author(s):

N Bommayasamy and Nallaiah Durairaj

Abstract: A field experiment was conducted during late pishanum season (2004-05) at Agricultural College and Research Institute, Killikulam, to study the effect of non monetary inputs on growth and yield of rice under SRI method. The experiment was conducted in split and split plot design with type of nursery and age of seedlings in main plot, spacing (20 x 20 cm, 25 x 25 cm and 30 x 30 cm) in sub plot and number of seedlings hill^-1 (single and double) in sub sub plot. The nursery type and age of seedlings did not show any significant difference in influencing all the growth traits at all the stages. Adoption of higher plant density at 25 hills m^-2 had pronounced effect in producing higher plant height, leaf area index and crop growth rate at all the stages. The nursery type did not show any significant impact on grain and straw yield. However, it was numerically higher under 14 days old conventional nursery (7788 kg ha^-1) compared to other nursery methods. Increase in grain yield with 20 X 20 cm spacing was 5.9 and 11.7 per cent higher over 25 X 25 cm and 30 X 30 cm respectively. Numbers of seedlings failed to influence productive tillers m^-2, number of filled grains panicle^-1 and also failed to influence grain yield, straw yield and harvest index and thereby economics.

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