dc.description.abstract |
Production of maximum quantity and good quality maize grain are the main
bottleneck in Bangladesh, due to its sub-optimal management strategies aside of
inorganic environment. From this perspective a field experiment was carried out at the
research field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during
November, 2015 to April, 2016 to find out the response of nitrogen efficiency bioavailability
(NEB) on growth, yield and quality of maize (Zea mays L. cv. ACI
Hybrid DON 111). The experiment consisted of eight different combinations of NEB
with inorganic fertilizers namely, T
= 50% recommended urea (RU) + 500 ml NEB
ha
-1
along with other fertilizers, T
2
1
= 50% RU + 750 ml NEB ha
-1
along with other
fertilizers, T
3
= 50% RU + 1000 ml NEB ha
-1
along with other fertilizers, T
= 50% RU
+ 1250 ml NEB ha
-1
along with other fertilizers, T
= 50% RU and 25% reduction of
P, K, S + 750 ml NEB ha
-1
, T
6
5
= 50% RU and 25% reduction of P, K, S + 1000 ml
NEB ha
-1
, T
7
= 50% RU and 25% reduction of P, K, S + 1250 ml NEB ha
=
100% recommended chemical fertilizer fertilizer (255-55-140-40-2-6 kg ha
of N-P-K-SB-Zn).
The
experiment
was
laid
out
in
a
randomized
complete
block
design
with
three
replications. Results demonstrated that NEB in combination with chemical fertilizers
had significant effects on most of the growth, yield and quality contributing
parameters studied in this experiment. Among the eight treatments, the combination
of NEB at the rate of 1250 mL ha
-1
and 50% recommended urea along with other
fertilizers at conventional rate showed better performance on number of cobs plant
,
number of rows cob
-1
, shelling (%), grain yield, seed grading, germination (%) and
also on popping recovery (%) of maize which was statistically similar to the
combination of NEB at the rate of 1000 mL ha
-1
and 50% recommended urea along
with other fertilizers at conventional rate. On the other hand; days to tassel initiation
and full tassel emergence, days to silk initiation showed the delayed performance
when the crop was managed by T
(100% recommended chemical fertilizers). The
maximum yield of maize was found from T
8
4
(13.51 t ha
-1
) which was statistically
similar to T
3
(12.61 t ha
-1
) where as the application of 100% recommended chemical
fertilizers exhibited the worst one (4.10 t ha
-1
) for grain yield of maize. From this
study, it may be concluded that NEB had significant positive response for the
improving of grain yield and quality of maize when applied at the rate of 50% urea
and 1000 ml of NEB per hectare. Finally, NEB may put remarkable contribution
for improving the quantity and quality of maize grain by reducing the application of
chemical fertilizers. |
en_US |