EFFECT OF SOWING TIMES ON THE MORPHO- PHYSIOLOGICAL AND YIELD ATTRIBUTES OF AN EXOTIC (CHINA) HYBRID RICE VARIETY IN BANGLADESH

Abstract

The experiment was conducted at the Agricultural Botany experimental field of Sher-e Bangla Agricultural University (SAU), to study the effect of sowing times on the morpho-physiological attributes of an exotic (China) hybrid rice variety in Bangladesh. Five treatments was considered regarding 5 sowing dates or transplanting dates viz. (i) S1 = 1st sowing at 1st January 2015; Transplanted at 21st January, (ii) S2 = 2nd sowing at 21st January; Transplanted at 11th February, (iii) S3 = 3rd sowing 11th February; Transplanted at 3rd March, (iv) S4 = 4th sowing 3rd March; Transplanted at 23rd March and (v) S5 = 5th sowing 23rd March; Transplanted at 13th April. Data were recorded on different growth, yield and yield contributing parameters to examine the effect of sowing times on the morpho-physiological attributes of the tested variety. The studied parameters were significantly affected by different sowing times or transplanting times. Results revealed that different parameters regarding morpho-physiological attributes, the seeds of the tested variety sown at 1st January 2015 and transplanted at 21st January (S1) furnished the best results in respect of the highest length of panicle at harvest (26.39 cm), weight of filled grain hill-1 (38.87 g), weight of filled grain plot-1 (2.18 kg), 1000 seed weight (36.00 g), grain yield ha-1 (3.64 ton) and the highest harvest index (43.46 %) compared to the seedling transplanted on other dates. So, the optimum time of seed sowing in the seed bed can be considered as the first January and transplanting time can be considered as 21 January in Bangladesh to get the highest yield from the tested Chinese rice variety.