Abstract:
Field trial (in
hybrid maize (cv. BARI Uybrid Maize-5) seed production
was conducted in Non-Calcareous Floodplain Soils under lista Meander
Floodplain (AEZ 3) of Agricultural Research Suttion. BARI, I3urirhat. Rangpur
during rob!
season of 2007-2008 to find out the optimum lime and boron doses
for quality seed production of hybrid maize. Three levels of lime (0.0. 1.5 and
3.0 t hi') and four levels of boron (0. 1.2 and 3kg ha') were used as treatment
variables. A blanket dose of N120P35 K6 S,0Zn5
kg ha1
and cowdung 5.0 t ha'
were used in the study. The treatments were arranged in a split plot design with
3 replications. Lime treatments were randomly at-ranged in main plot and boron
levels in the sub plot. Different fertilizer treatments have created significant
influence on growth, yield, yield contributing characters and quality of
hybrid maize seed. Leaf area planf', leaf area index (LAI). crop growth
rate (CGR) and net assimilation rate (NAR) of female parent of BAR!
hybrid niaize-5 was increased sharply from 60 days after sowing (DAS)
and reaching maximum at 120 DAS and then declined sharply
irrespective of treatment differences.
The combined ellect of boron and lime was found superior to their
single application. The interaction effect between boron and lime was
signiuicant for hybrid maize seed yield. The highest yield (2809 kg) was
YHI
recorded from boron
@2.12
kg ha" and limc ® 1.5 i ha" application. From
regression equation, optimum and economic dose for B in respect of without
liming was calculated to be 2.40 and 2.39 kg B ha"; with 1.5 I ha"liming, it
was 2.13 and 2.12 kg B ha" and with 3 t hi'
liming it was 2.0 and 1.99 kg B
ha"along with blanket dose of
N 120P35 K65S207-n5kg
ha" plus 5.0 t cowdung
The results revealed that boron @ 2.12-2.13 kg ha" and lime @ 1.5 t hi' along
with a blanket dose of N,
20P35K65S20Zn5
kg ha" plus 5.0 t cowdung ha" could
be optimum for maximizing the quality seed yield oI'hybrid maize in Rangpur
region (AEZ 3).
