TILLERING BEHAVIUR OF RICE (Oryza sativa L.) AND ITS CONTRIBUTION TO GRAIN YIELD AS INFLUENCED BY VARIETY AND SEEDLING AGE IN BORO SEASON

Abstract

The present study was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during November 2017 to March 2018, to determine the contribution of tillers on rice seed yield as affected by variety and seedling age in Boro season. The experiment was laid out in randomized complete block design (RCBD) with 3 replications. The experiment included two varieties of Boro rice (V 1 = BRRI dhan28 & V = BRRI dhan29) and 5 treatments (T 1 = 10 days old seedlings, T = 15 days old seedlings, T 3 = 30 days old seedlings, T 4 = 45 days old seedlings, T = 60 days old seedlings) along with each of 3 replications. The results revealed that higher values of all the yield attributes were maximum under T (10 days old seedling) followed by T 1 2 (30 days old seedling) in both the varieties viz. BRRI dhan28 and BRRI dhan29 where a clear dominancy of BRRI dhan29 over BRRI dhan28 on every parameter. Transplantation of 15 days old seedlings (T ) produced significantly higher grain yield. In variety and seedling age combination, most of the yield parameters exhibit the highest values V 2 T (BRRI dhan29 x 30 days old seedlings). The results revealed that transplantation of seedlings (above 15-30 and above 40 days old) and younger seedlings below 15 days old reduced the grain yield consistent 2 2 5 2 2