Optimizing the Yield of Rice (Variety: BRRI Dhan29) Through Appropriate Agronomic Practices to Ensure Food Security

Abstract

Five individual experiment was conducted at the Research and Development Farm of Syngenta Bangladesh Limited (Multinational Plant Science Company, former Ciba­Geigy) Birgram, Bogra, Bangladesh during two consecutive Boro season from November'2006 to May'2007 and November'2007 to May'2008 in order to optimizing the yield of rice (cv. BRR! dhan29) through appropriate agronomic practices like spacing, time of transplanting, nitrogen rate, seedling age, seedling number hilr' and method of weed control. Each experiment included a set of treatment and experiment 1, 2, 3, 5 was laid out in a randomized complete block design with three replication and experiment 4 was laid out in a randomized complete block design (factorial) with three replication. The result revealed that spacing, planting time, nitrogen application rate, seedling age and seedling number hiir1 and weeding method has significant effect on yield and yield contributing character of BRRI dhan29. Highest grain yield (7.32 t ha-1) and biological yield (14.36 t ha-1) was obtained from 25cm x 20cm spacing due to higher number of effective tiller per m2, highest fertile spikelet panicle•' and lowest sterile spikelet panicle•1. Planting of 10th January gave the highest grain yield (7.18 t ha-1) and biological yield (14.10 t ha-1) due to highest number of effective tiller per hill, highest fertile spikelet panicle•1 and highest 1000 grain weight. Application of nitrogen @ 110 kg/ha produced the highest grain yield (7.18 t ha-1), straw yield (7.31 t ha-1) and biological yield (14.49 t ha-1) due to higher number of effective tiller per hill, highest panicle length and highest fertile spikelet panicle-1. Planting at 40 days old seedling obtained highest grain yield (6.77 t ha-1) and planting 2 seedling hilr1 gave highest grain yield (6.28 t ha-1) but the highest grain yield (7 .64 t ha•') was obtained in BRRI dhan29 due to the interaction effect of 40 days old seedling and 2 seedling hill-1 . The result summarized that the spacing of 25cm x 20cm coupled with 40 days old seedling and 2 seedling hill-1 transplanting at 10th January, application of nitrogen @ 110 kg/ha and controlling of weeds by applying Rifit @ 1.0 1 ha•' showed better performance in respect of growth, yield and yield component of rice (cv. BRRI dhan29) that will increase the rice production and contribute to the food security in Bangladesh.