IMPROVEMENT OF YIELD AND AROMATIC QUALITY OF FRAGRANT RICE THROUGH SUPPLEMENTATION OF POTASSIUM AND SULPHUR

Abstract

A field experiment was conducted at the Agronomy field, Sher-e-Bangla Agricultural University (SAU), during July to December, 2019 with a view to finding out improvement of yield and aromatic quality of fragrant rice through supplementation of potassium and sulphur in Aman season. The experimental treatments included two T. aman rice varieties viz., BRRI Dhan 80 and BRRI Dhan 34 , three levels of potassium viz., K ii

1 = 60 kg MoP ha -1 , K 2 = 65 kg MoP ha , K 3 = 70 kg MoP ha -1 and three levels of sulphur viz., S 1 = 45 kg Gypsum ha = 50 kg Gypsum ha -1 , S 3 = 55 kg Gypsum ha -1 . The experiment was laid out in a split-split plot design with three replications. There were 18 treatments combinations. The total numbers of unit plots were 54. Results showed that rice varieties differed significantly in all growth characters and BRRI Dhan 80 produced higher grain yield (4.39 t ha gave the highest grain yield (4.30 t ha -1 -1 ).Among the review, the 65 kg MoP ha ). Increase of K level 50 kg Gypsum ha

performed well in growth and gave higher grain yield (4.35t ha ). Interaction results showed that significantly higher grain yields were given by transplanting BRRI Dhan 80 with 65 kg MoP ha -1 (4.71 t ha -1 ),Combination with the application of 50 kg Gypsum ha -1 -1 in BRRI Dhan 80 (4.51t ha ). The maximum grain yield (5.04 t ha -1 ) was obtained from the combination of BRRI Dhan 80 with 65 kg MoP ha -1 and 50 kg Gypsum ha -1 .The higher grain yield was attributed mainly to the number of effective tillers hill -1 -1 -1 , filled grains panicle

and 1000-grain weight. Protein content(8.55%) and grain 2-AP content( 1.02 µg g -1 ) was found from the combination of BRRI Dhan 80 with 65 kg MoP ha and 50 kg Gypsum ha -1 .

It may be concluded that the application of 65 kg MoP ha -1 and 50 kg Gypsum ha -1 along with recommended dose of other fertilizers may be use for producing good quality aromatic rice.