T. B. NAYAK, S. J. VAGHELA*, J. K. MALAV AND D. M. PATEL
Chimanbhai Patel College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University,
Sardarkrushinagar- 385 506 (Gujarat), India
Centre for Millets Research, Sardarkrushinagar Dantiwada Agricultural University,
Deesa-385 535 (Gujarat), India
*(e-mail : sjagron@sdau.edu.in)
(Received : 12 June 2023; Accepted : 30 June 2023)
SUMMARY
A field experiment on nitrogen management in forage sorghum [Sorghum bicolor (L.) Moench] was carried out at Agronomy Instructional Farm, Chimanbhai Patel College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar during kharif season of 2021 in loamy sand. Nine treatment combinations comprising three levels of nitrogen (75, 100 and 125%) and three splits (one split at 30 DAS, two splits at 30 and 45 DAS and three splits at 30, 45 and 60 DAS) were laid out in RBD (factorial concept) with four replications. Results revealed that plant height, length of leaves, green and dry forage yield, number of leaves/plant, width of leaves, leaf: stem ratio and crude protein content were significantly the highest with the application of N @ 125%. Whereas, results was obtained for plant height, number of leaves/plant, length of leaves, green and dry forage yield and crude protein content were significantly higher with the application of nitrogen in three splits at 30, 45 and 60 DAS. Nitrogen and phosphorus content and uptake as well as available nitrogen content in soil after harvest of the sorghum were significantly higher with application of 125% N and three splits of nitrogen at 30, 45 and 60 DAS.
Key words: Nitrogen levels, N split, Forage sorghum, green fodder yield, economics