Effect of integrated nutrient management on yield attributes and yield of forage sorghum under North Gujarat agro-climatic conditions

A field experiment was conducted during kharif season of 2022 and 2023 at Agronomy Instructional Farm, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar, Gujarat to study the effect of integrated nutrient management on yield attributes and yield of forage sorghum under North Gujarat Agro-climatic conditions. The experiment was consist of nine treatment combinations of three organic manures, viz., no manure, FYM @ 10.0 t /ha, castor cake @ 1.0 t /ha and three fertility levels, 100% RDF, 75% RDF and 50% RDF in split plot design with four replications. Among sources of organic manures applied to forage sorghum, castor cake @ 1.0 t/ha proved significantly superior with respect to yield attributes such as plant height, leaf area per plant, leaf: stem, stem girth, length of internode, dry matter accumulation, RGR and CGR between 0-30 and 30-60 DAS as well as green and dry forage yields, which was followed by application of FYM @ 10 t/ha. Application of 100% RDF to forage sorghum remarkably improved yield attributes viz., plant height, leaf length, leaf area per plant, leaf: stem ratio, stem girth, length of internode, dry matter accumulation, RGR and CGR between 0-30 and 30-60 DAS; yields viz., green and dry forage compared to 50% RDF.