AGRONOMIC CHARACTERIZATION OF LONG GRAIN TRANSPLANTED AMAN RICE GENOTYPES

Abstract

The field experiment was conducted at the experimental farm of Sher-e-Bangla Agricultural University (SAU), Dhaka, during the period from July 2017 to December 2017 to study the performance of different rice genotypes in Aman season under the Modhupur Tract (AEZ-28). The experiment consisted of 15 rice genotypes viz. (i) SAU ADL1, (ii) SAU ADL2, (iii) SAU ADL3, (iv) SAU ADL4, (v) SAU ADL5, (vi) SAU ADL6, (vii) SAU ADL7, (viii) SAU ADL8, (ix) SAU ADL9, (x) SAU ADL10, (xi) SAU ADL11, (xii) SAU ADL12, (xiii) SAU ADL13, (xiv) SAU ADL14 (xv) SAU ADL15 along with a local check variety (xvi) Kataribhog. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications of each treatment. The plant height was observed at harvest where SAU ADL14. produced the tallest plant (196.59 cm) and SAU ADL8 gave the shortest plant height (95.10 cm) At harvest, the maximum tiller number hill -1 was observed in the SAU ADL5 (9.80)and the lowest (4.80) was from SAU ADL14. The highest plant dry matter hill -1 (67.72 g) at harvest was found in SAU ADL15 and the lowest was found in SAU ADL 13.. At 90 DAT, maximum SPAD value was recorded for SAU ADL11 (46.03) and the minimum SPAD value was also recorded for SAU ADL8 (35.13). The genotypes SAU ADL10, SAU ADL14, SAU ADL15, SAU ADL1, SAU ADL2, SAU ADL3, SAU ADL4, SAU ADL5 and SAU ADL8 needed longest time for flowering (80 days). On the contrary, the genotype SAU ADL 9 needed shortest time (70 days) for flowering .The highest effective tiller hill -1 (9.27) were recorded for the genotype SAU ADL9 and minimum effective tillers hill -1 were recorded in SAU ADL12 (5.88).The longest panicle length (31.61 cm) was recorded for the genotype SAU ADL12 and the shortest panicle length was recorded in SAU ADL8. The highest number of filled grains panicle -1 was obtained from SAU ADL9 (138.78) which was statistically similar with SAU ADL1, SAU ADL3 and SAU ADL12. The lowest number of filled grains panicle -1 was found in the SAU ADL10 (34.12) which was statistically similar with SAU ADL6 and SAU ADL8.The maximum 1000 grains weight (41.99 g) was counted in the SAU ADL4 and the minimum number of grains weight was counted in kataribhog (11.45 g). The maximum grain yield (2.88 t ha -1 ) was recorded in SAU ADL1 that similar to SAU ADL14. The lowest grain yield (0.43 t ha -1 ) was obtained from SAU ADL8 which was statistically similar to SAU ADL10 (0.62) and SAU ADL4 (0.89). The highest straw yield (10.24 t ha -1 ) was recorded in SAU ADL1. The minimum straw yield (1.67 t ha ) was obtained from SAU ADL 8. The highest and lowest biological yield were recorded for SAU ADL1 and SAU ADL8 respectively. The highest harvest index was obtained from the genotype SAU ADL 9 (35.67%) and the lowest harvest index (11.47%) was found from SAU ADL10. So, it may be concluded that grain yield of SAU ADL1 and SAU ADL14 were superior and higher yielder than Kataribhog (local check) -1