Effect of Nitrogen and Organic Nutrient Management on Growth Dynamics of Sorghum-Chickpea Cropping System

Abstract

A field experiment was conducted at the Instructional Farm, Rajasthan College of Agriculture, MPUAT, Udaipur during two consecutive kharif seasons 2024, 2025 and then after the succeeding crop in rabi 2024-25 and 2025-26, to study the effect of nitrogen and organic nutrient management on growth dynamics of sorghum-chickpea cropping system. An experiment was laid out in split plot design, comprising four nitrogen management practices in main plot treatments (control, 100% recommended dose of nitrogen (RDN), 75% RDN + 25% N through FYM and 50% RDN + 50% N through FYM), five organic sources of nutrients in subplot treatments viz., control, seed treatment with beejamrit (200 ml kg-1 seeds), jeevamrit during each irrigation (500 litre ha-1), ghanjeevamrit as basal application (500 kg ha-1) and vermiwash foliar spray at 30 and 45 DAS (10%), replicated three times. The experimental results showed that application of 100% RDF recorded significantly higher values of growth parameters viz., plant height and dry matter accumulation in sorghum, which was statistically at par with 75% RDN + 25% N through FYM. Whereas, residual effect of 50% RDN + 50% N through FYM recorded significantly higher values of growth parameters, which was statistically comparable with 75% RDN + 25% N through FYM. Among subplot treatments, application of ghanjeevamrit and its residual effect was found to be superior over the rest of the treatments and comparable with application of jeevamrit @ 500 l ha-1 during each irrigation. The results showed that integrated nitrogen management through 50-75% RDN with addition of FYM along with ghanjeevamrit as basal application had positive effect on growth parameters of sorghum-chickpea cropping system.