| dc.description.abstract | Rice (Oryza sativa L.) is the most important staple food for over two billion people in
Asia. Seed priming with growth regulators, especially salicylic acid, is a promising
alternative seed primer because it is an important inducer of resistance against diseases
and pests, as well as acting significantly on quality and seed yield. A field experiment
was carried out at Agronomy research field in Hajee Mohammad Danesh Science and
Technology University, Dinajpur located at 25.56°N latitude and 88.5°E longitude at an
altitude of 37 m above from the mean sea level during the period from 14th December
2018 to 17th May 2019 to study the influence of seed priming by Salicylic Acid in
comparison to non-priming or exogenous application of SA on growth and yield
contributing character of BRRI Dhan28. The experiment was laid out into Randomized
Complete Block Design (RCBD) with three replications. Two factors were taken in this
study viz. factor A: P1= Without priming seedling, P2= Seed priming by SA and P3=
Exogenous application of SA; Factor B: Z1 = 7 kg Zn ha-1, Z2 = 14 kg Zn ha-1 and Z3 =
21 kg Zn ha-1. Data were recorded on different growth, and yield contributing
parameters. Among the yield and yield contributing parameters namely effective tillers
hill-1, filled grains panicle-1, unfilled grain panicle-1, grain yield and straw yield were
significantly varied with priming treatments as well as level of zinc application. The
highest plant height (101.43 cm), number of effective tillers per hill (18.86) was found in
the treatment T5 due to the primed seed by SA and application of 14 kg zinc ha-1. The
highest number of filled grain (127.37) was found in treatment T5. The maximum grain
yield (6.38 t ha-1), straw yield (6.88 t ha-1), biological yield (13.23 t ha-1) and harvest
index (48.11 %) were found in the treatment T5. On the other hand, minimum grain yield
(4.51 t ha-1), the lowest straw weight (5.98 t ha-1), biological yield (10.48 t ha-1), harvest
index (41.443 %) was found in the treatment T1 (without priming + zinc 7 kg ha-1).
According to grain yield treatments can be arranged as T5>T6>T8>T4>T9>T7>T2>T3>T1.
The treatments can be arranged according to straw yield
asT5>T6>T4>T8>T7>T9>T2>T3>T1. From these results it can be concluded that all of the
important growth parameters and yield contributing characters were improved due to
seed priming interacting with zinc 14 kg ha-1 resulting higher yield of BRRI dhan28. | en_US |
