Influence of Cutting Date and Nitrogen Fertilizer Levels on Growth, Forage Yield, and Quality of Sudan Grass in a Semiarid Environment
Table 4
Crude protein content (%) and protein yield (kg/ha) of Sudan grass as affected by cutting date and nitrogen fertilizer levels during 2016 and 2017 summer seasons.
Treatments and interactions
Crude protein (%)
Protein yield (kg/ha)
1st cut
2nd cut
1st cut
2nd cut
Season 2016
Cutting date (D)
Early
12.81
13.18
579.4
566.4 a
Late
12.77
13.24
643.9
534.6 b
F test
NS
NS
NS
Nitrogen fertilizer levels (N)
35 kg
12.26 b
12.72 b
352.6 c
490.9 b
70 kg
12.84 a
13.29 ab
588.3 b
554.4 a
105 kg
13.27 a
13.61 a
894.0 a
606.2 a
F test
Interactions D × N
NS
NS
NS
Season 2017
Cutting date (D)
Early
11.33
12.05
400.6
377.7
Late
11.54
12.14
380.6
367.7
F test
NS
NS
NS
NS
Nitrogen fertilizer levels (N)
35 kg
10.61 b
11.69 b
333.3 c
324.2 b
70 kg
11.56a
12.16 ab
403.8 b
398.5 a
105 kg
12.13a
12.44 a
434.8 a
395.5 a
F test
Interactions D × N
NS
NS
NS
NS
and indicate significance at 0.05 and 0.01 levels, respectively, and NS indicate insignificancy of differences.