Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
statistically analysed using Analysis of Variance (ANOVA), critical difference (CD) at a 5 %
probability level was calculated only when the F value was significant.
Results
Influence of dates of sowing and levels of nitrogen on yield attributing characters, grain
yield and straw yield
Treatment
A. Dates of sowing
Panicles
m -2
Panicle
length
(cm)
Filled
grains
panicle -1
1000 grain
weight (g)
Grain
yield (q ha -
1
)
10 th August 222.60 22.96 98.21 26.47 31.56 37.65
20 th August 217.93 21.96 86.76 26.29 26.18 39.17
30 th August 204.89 21.31 76.63 26.07 20.82 46.46
09 th September 182.68 20.59 56.75 23.90 9.95 52.18
SEm (±) 2.37 0.18 2.55 0.06 0.69 1.46
CD (5%) 8.21 0.63 8.83 0.22 2.39 5.04
B. Levels of nitrogen
40 kg/ha 189.20 20.42 73.16 25.34 17.54 37.79
60 kg/ha 198.44 21.42 75.11 25.54 20.24 41.59
80 kg/ha 206.51 21.96 78.87 25.67 22.70 44.68
100 kg/ha 221.99 22.63 87.01 25.92 25.70 45.57
120 kg/ha 218.98 22.11 83.77 25.94 24.47 49.68
SEm (±) 2.54 0.18 1.94 0.07 0.69 1.49
CD (5%) 7.31 0.51 5.59 0.22 1.99 4.29
Interaction (AxB) ** NS NS NS NS NS
** Significant, NS- Non-significant
Straw yield
(q ha -1 )
Among the different dates of sowing, 10 th August sowing date recorded the highest number
of panicles m -2 , panicle length, total number of grains panicle -1 , number of filled grains
panicle -1 , 1000 grain weight and grain yield (Table). This might be due to favorable weather
conditions during the critical growth stages like panicle initiation, flowering (growth
attributes) and grain filling periods and also the availability of more time for better growth
(Singh et al., 2004) which may lead to the increase in all growth attributes. Whereas as the
sowing was delayed, the straw yield increased significantly with the highest in 9 th September
sown crop. The increase in straw yield with delayed sowing might be due to the unfavourable
weather conditions experienced by the crop which might have restricted the translocation of
photosynthates from source to sink. Among the nitrogen levels, 100 kg N ha -1 recorded
highest growth attributes and grain yield but was statistically at par with 120 kg N ha -1 . The
highest 1000 grain weight and straw yield were recorded in 120 kg N ha -1 (Table).
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