| dc.description.abstract | Weed is one of the most harmful enemy of rice that reduces yield and sulphur is used to
ensure higher yield of rice with binding of essential nutrient. The experiment was
conducted at the Agronomy Research Field of Hajee Mohammad Danesh Science and
Technology University, Dinajpur (HSTU) during the boro season from December, 2018
to June, 2019 to evaluate the effect of weed management and sulphur on the yield and
yield attributes of boro rice. The research work was set up in randomized complete block
design (RCBD) where weeding treatment and methods of sulphur application were
allocated in main plot. The experiment comprise the two factors where weed control
measurement consisting of W1= No weeding, W2= Pre-emergence herbicide + 1HW at
40 DAT, W3= Post-emergence herbicide + 1HW at 40 DAT and W4= Two hand weeding
at 20 and 40 DAT and another factor comprised of three doses of sulphur application
including S1= 25 kg ha-1, S2= 50 kg ha-1 and S3= 75 kg ha-1 gypsum. In case of boro rice,
the morpho-physiological characteristics, yield and yield contributing characters of rice
were significantly influenced by weeding regime and method of sulphur application.
During the growth period of rice, the plant height, number of tillers hill-1 produced their
highest values at all days after transplanting (30, 60 and 90 DAT) in W2= Pre-emergence
herbicide + 1HW at 40 DAT while their corresponding lowest values were found in no
weeding (W1). In case of growth parameters, the highest value was found at all days after
transplanting at S2= 50 kg ha-1 of gypsum whereas lowest values were found in S1= 25
kg ha-1 of gypsum. In case of yield contributing characters, the highest grain yield (6.52 t
ha-1) was obtained from W2= Pre-emergence herbicide + 1HW at 40 DAT and the lowest
(3.90 t ha-1) value was recorded from W1= No weeding treatment. The interaction of
weeding regime and sulphur management showed that the Pre-emergence herbicide +
1HW at 40 DAT (W2) with 50 kg ha-1 of gypsum produced the highest grain yield (6.73 t
ha-1). The maximum grain yield (5.70 t ha-1) was produced by the treatment of S2 with
the recommended dose of 50 kg ha-1 gypsum with the resultant effect of highest number
of effective tillers hill-1 and grains panicle-1 in this treatment whereas the lowest grain
yield was found in the S1 treatment (5.41 t ha-1). From the experimental result, it is
suggested that BRRI dhan29 may be grown economically with the application of Preemergence herbicide + 1HW at 40 DAT (W2) combined with 50 kg ha-1 of gypsum. | en_US |
