Response of Nano Nitrogen Fertilizer on Growth Dynamics of Pigeonpea [Cajanus cajan (L.) Millsp.]

Abstract

An experiment was conducted during Kharif 2023 at Zonal Agricultural Research Station, Gandhi Krishi Vigyan Kendra, Bengaluru to investigate the response of nano-nitrogen on the growth and yield of pigeonpea. The experiment consisted of 11 treatments involving two levels (75 % and 100 %) of nitrogen as a basal dose and four concentrations of nano-urea (4 ml, 6 ml, 8 ml and 10 ml per litre) as foliar spray compared with the recommended dose of fertilizers and foliar spray of 2 % conventional urea. The trial was laid out in a randomized complete block design with three replications. The results of the study revealed that, application of 100 per cent RDN with foliar application of nano urea 4 ml L-1 at flowering stage (FG) and pod development (PD) stage recorded significantly higher plant height (78.9 and 128.2 cm, respectively at 90 and 135 DAS),  number of primary branches per plant (5.8 and 12.4, respectively at 90 and 135 DAS), number of secondary branches per plant (4.5 and 5.6, respectively at 90 and 135 DAS), leaf area per plant (114, 500 and 2856 cm2 plant-1, respectively at 45, 90 and 135 DAS) and total dry matter accumulation (32.3 and 103.4 g plant-1, respectively at 90 and 135 DAS) as compared to other treatments.