| dc.description.abstract | A field experiment was conducted at the Agronomy Research Field, Hajee Mohammad
Danesh Science and Technology University, Dinajpur during the period from December,
2016 to April, 2017 to appraise the effect of zinc and GA3 on yield and yield contributing
characters of BRRI dhan29. The BRRI dhan29 was collected from BADC. The
conducted experiment comprised of two factors; Factor-A: Zinc sulphate where
Z1=control, Z2=7 kg, Z3=14 kg and Factor B: Gibberellic acid (GA3), where G1= control,
G2= 75 ppm, GA3= 150 ppm. The experiment was laid out in Randomized Complete
Block Design (RCBD) with three replications of each treatment. The seeds of BRRI
dhan29 were sown in the seed bed on December 19, 2016. Growth, yield and yield
contributing characteristics of BRRI dhan29 were significantly influenced by different
doses of zinc fertilizer and GA3. Individual application of different levels of zinc
fertilizer and gibberellic acid showed significant effect on growth, yield and yield
attributes studied. The highest plant height, number of total tillers hill-1 was observed in
Z3, and the effective tillers, panicle length, 1000-grain weight, grain yield, straw yield,
biological yield and harvest index were significantly increased in Z2. Among the
different concentrations of GA3 the highest plant height, number of total tillers hill-1
was
observed in G3 and the effective tillers, panicle length, 1000-grain weight, grain yield,
straw yield, biological yield and harvest index were significantly increased in G2
treatment. On the other hand, among the different combinations of zinc and GA3, the
highest plant height was observed in Z1G1, panicle length, numbers of grain panicle-1
,
1000-grain weight, grain yield, biological yield and harvest index were obtained in Z2G2.
The highest grain yield 6.27 (t ha-1) was found at the concentration of Z2, whereas the
lowest grain yield 5.22 (t ha-1) was gained at control condition. The highest grain yield
6.76 (t ha-1) was found at the concentration of GA3 at 75 ppm, whereas the lowest grain
yield 4.87 t ha-1 was gained at control condition. The maximum grain yield 6.62 (t ha-1)
was acquired at the treatment combination of Z2G2 and the minimum 4.60 t ha-1
was
recorded under the treatment combination of Z1G1. The present study revealed that zinc
and GA3 would be applied at the rate of 7 kg ha-1 and 75 ppm, respectively for enhancing
the yield attributes as well as yield of BRRI dhan29. | en_US |
