| dc.description | Wheat is annual cereal belonging to the family Gramineae. The hexaploid
species, Triticum aestivum L. is of two types, winter and spring wheat. In our
country, only spring wheat is commercially grown. It passes through various
stages to complete its life cycle, such as seedling emergence, crown root
initiation, booting, heading, anthesis and physiological maturity stages. | en_US |
| dc.description.abstract | An experiment was conducted at the Crop Physiology and Ecology farm in
Hajee Mohammad Danesh Science and Technology University, Dinajpur
during the period from November 2011 to April 2012 to study the effect of
different doses of nitrogen fertilizer and time of their application on the growth
and yield of wheat (BARI Gom 26). Three fertilizer doses viz., 90, 110, and
130 kg N ha’! and three application times viz., total N at basal (T,), 2/3 N at
basal + 1/3 N at 20 DAS (T>) and 1/3 N at basal + 1/3 N at 20 DAS + 1/3 N at
45 DAS (T3) were used. The experiment was laid out in a Randomized
complete block design with three replications. The size of unit plot was 2m x
1.5m and the date of planting was 28th November 2011. Different doses of
nitrogen showed significant variations in respect of all the growth and yield
characters of wheat. Plant grown with 130 kg N ha’' gave the highest plant
height, spikelet per spike, grain per spike, grain weight per spike, no. of spike
per m’, 1000-grain weight, grain yield, straw yield, total dry matter content,
leaf area index, CGR, LAD, NAR, RGR, days to 50% tillering, booting,
heading, anthesis and physiological maturity. The doses of nitrogen may be
graded as follows in respect to grain yields, 130 kg ha’ > 110 kg ha! > 90 kg
ha! with 3.29 t ha’ > 2.87 t ha’ > 2.61 t ha’. The time of application of
nitrogen fertilizer also influenced grain yield, straw yield and other parameters.
The time of application may be graded as follows in respect of grain yield as
T3>T,>T,. Combined effects of nitrogen rate and application time exhibited
significant variations on grain yield; straw yield and ‘other parameters. In
respect of grain yield, 130 kg N ha’ with T; gave the maximum grain yield
(3.92 t ha’) and the lowest grain yield (2.24 t ha’) was observed from 90 kg N
ha! with T,. Moreover, 130 kg N ha’ with T3 gave highest straw yield (6.10 t
ha') and 90 kg N ha’ with T,; produced the lowest (4.60 t ha™') straw yield.
Therefore, the study revealed that 130 kg N ha’ nitrogen and T; showed best
performance on aspect of yield and yield contributing characters on BARI Gom
26. | en_US |
