Page 21 - BJS vol. 35

Effect of Nitrogen and Potassium on Growth ........... Sugar Beet 13

peak at 120 DAE and thereafter decreased gradually. This increase was due to the
production of higher number of functioning leaves, which increased total photosynthetic
area. Similar trend was also reported by Theurer (1979) in sugarbeet. Different nitrogen
levels strongly influenced the LAI at 60, 90, 120, 150 and 165 DAE. At 120 DAE, the
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highest LAI (3.47) was obtained with 150 kg N ha followed by 100 kg N ha (2.75) and
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50 kg N ha (1.90) and the lowest LAI (1.53) was found when no nitrogen was applied.

Figure 1. Plant height in tropical sugar beet genotype shubhra over time as influenced by
different levels of nitrogen application. Vertical bar indicates LSD 0.05.
Table 1. Number of leaves per plant in tropical sugarbeet genotype shubhra over
time
Treatment Number of leaves per plant
(N×K) 30 DAE 60 DAE 90 DAE 120 DAE 150 DAE 165 DAE
N 0 K 0 6.33 13.00 19.33 30.33 31.67 29.67
N 0 K 60 6.33 13.67 19.33 31.00 32.00 30.33
N 0 K 120 6.33 14.33 19.67 31.67 32.00 30.00
N 0 K 180 6.33 14.00 19.33 31.00 32.00 30.00
N 50 K 0 6.66 14.33 20.67 32.00 33.33 31.67
N 50 K 60 6.33 14.33 20.67 32.00 33.67 31.67
N 50 K 120 6.33 14.33 21.00 32.67 34.00 32.00
N 50 K 180 6.66 14.00 21.00 32.67 34.33 32.67
N 100 K 0 6.33 14.33 21.33 33.33 34.67 32.00
N 100 K 60 6.33 14.67 21.67 33.00 35.00 32.33
(Contd.)