Effect of nitrogen management on growth and yield of maize (Zea mays L.)

Abstract

The experiment was carried out at Raj Mohini Devi College of Agriculture and Research Station Ambikapur (C.G.) during the Kharif 2022-23 season. The experimental laid out in randomized block design with three replication and twelve treatments. Among the different nitrogen management practices, application of 100% RDN (3 split N application) had higher growth as well as yield attributes. Results revealed the 100% RDN (3 split N application) significantly increased all the growth attributes viz. plant height, dry matter accumulation, crop growth rate and the yield attributes viz., cob length, cob girth, number of grain rows cob-1, number of grains row-1, number of cobs. The highest cob yield (8961.2 kg ha-1) and grain yield (7188.8 kg ha-1) were also achieved under T2: 100% RDN (3 split N application) followed by T6: T3 (75% RDN) + Nano urea two spray. T1 (Control) was recorded lowest in term of growth attributes, yield attributes and yield. The highest net return and B:C ratio were also recorded under 100% RDN (3 split N application).