Response of genotypes under varying fertility levels and bio-fertilizer inoculations on growth and yield of Indian mustard (Brassica juncea L.)

Abstract

A study was conducted in the rabi season of 2020-21 to assess the response of genotypes under varying fertility levels and bio-fertilizer inoculations on growth and yield of Indian mustard under humid and sub humid conditions. The sixteen treatment combinations of four genotypes of Indian mustard (Bio 902, DRMRIJ 31, RH 749 and NRCHB 101) and four fertility levels i.e. 75 % RDF (45 kg N + 30 kg P2 O5 /ha) 100 % RDF (60 kg N + 40 kg P2 O5 /ha), 75 % RDF + biofertilizer (liquid PSB and Azotobactor) and 100 % RDF + biofertilizer were taken in a factorial randomized complete block design with three replications. Among the various genotypes, ‘DRMRIJ 31’ recorded the maximum growth characteristics viz, plant height (49 186 and 207 cm), dry matter accumulation (17, 30 and 75 g/plant) at 30, 60 and at harvest and leaf area index (4.1) at 60 DAS, respectively. Among the fertility levels, 100% RDF + bio fertilizers recorded the maximum values of plant height, dry matter accumulation and leaf area index. The maximum seed yield (1812 kg/ha), stover yield (5123 kg/ha) and biological yield (6935 kg/ha) were recorded with DRMRIJ 31. Among fertility levels, the maximum seed yield (1694 kg/ha), stover yield (5065 kg/ha) and biological yield (6759 kg/ha) obtained under 100 % RDF + bio-fertilizer