Vol. 8 No. 2
Advantages of SRI cultivation in the tail end of Cauvery delta
Abstract: A field investigation was conducted to investigate the effect of System of Rice Intensification (SRI) practices on dry matter production, yield and nutrient uptake of short duration rice variety ADT 43 in the tail end of Cauvery delta zone at Karaikal during kharif season of 2006. Twelve treatment combinations (YOSC, NOSC, YMSC, YOSH, NMSC, NOSH, YMSH, YORH, NMSH, YMRH, NORH and NMRH) were replicated thrice in a Randomised Block Design in which Y refers to young seedlings of 14 days old from a modified rice mat nursery; N refers to normal seedlings of 21 days old from conventional nursery: O refers to one seedling hill-1; M refers to multiple seedlings (3 seedlings hill-1); S refers to square planting with wider spacing (22.5 cm × 22.5 cm); R refers to rectangular planting with closer spacing (12.5 cm × 10.0 cm); C refers to conoweeding between rows in both directions with hand operated conoweeder and H refers to hand weeding twice at 20 DAT and 40 DAT. The results revealed that the combination of young seedling (14 days old), one seedling hill-1, square planting with wider spacing (22.5 cm × 22.5 cm) and conoweeding four times at weekly interval starting from 15 DAT (YOSC) profoundly enhanced the dry matter production, root growth and nutrient uptake which in turn improved the grain yield by 68.25% over the traditional practice.
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