Vol. 9, Issue 12 (2020)

Author(s):
SV Varshini and R Babu

Abstract:
A field experiment to study the effect of graded levels and split application of nitrogen on growth and physiological attributes of hybrid maize CO (MH) 6 was conducted at AC&RI, Madurai. The field was laid on RBD design with three replications with treatments RDN (250 kg/ha), and STCR (167 kg/ha) on 3 splits and nitrogen levels 225, 200, 175 and 150 kg/ha under 3 splits and 4 splits. Results showed that plant height was higher with T₁ at 15, 30, 45DAS and with T₇ at 60 and 75 DAS. At 45 DAS T₁ showed better results with all the physiological attributes. Similarly at 30 DAS dry mater production and SPAD value was higher with T₁. At 60 DAS T7 showed better leaf area index, SPAD value and dry mater production. T₇ also showed significant results at 75 DAS with leaf area index and SPAD value. At harvest DMP was higher with T₇. For CGR and RGR, at 30 to 40 DAS T₁ showed higher results. Whereas from 40 to 60 DAS and 60 to Harvest T₇ recorded higher CGR and RGR.