NAVYA M. V.* AND USHA C. THOMAS
AICRP on Forage Crops and Utilization,
College of Agriculture, Vellayani, Thiruvananthapuram (Kerala), India
*(e-mail : navyavsnn@gmail.com)
(Received : 12 September 2022; Accepted : 29 September 2022)
SUMMARY
A field experiment was conducted at AICRP on Forage Crops and Utilization, College of Agriculture, Vellayani, Thiruvanathapuram, Kerala during October 2020 to April 2021 to study the influence of variation in levels and frequency of magnesium fertilization on yield and nutrient uptake of Bajra Napier hybrid. The experiment was laid out in factorial RBD with nine treatments replicated thrice. The treatment combinations included three levels of magnesium [M1– 80 kg/ha, M2 – 100 kg/ha and M3 – 120 kg/ha] and three frequency of application [F1 – split application once in 3 months, F2 – split application once in 4 months and F3 – split application once in 6 months]. Results of the study revealed that during the study period highest mean green and dry fodder yield and N and P uptake was recorded with split application of 100 kg MgSO4/ha given once in 6 months. However significantly higher potassium uptake was recorded with split application of 80 kg MgSO4/ha once in 6 months. The magnesium level of 100 kg MgSO4/ha given once in 3 months recorded the highest Mg uptake.
Key words: Bajra Napier hybrid, dry fodder yield, green fodder yield, magnesium fertilization, nutrient uptake