Author(s):

Dharmendra Gaur, SP Singh, GS Rawat, Kalpana Sharma, Hemlata Dhakad, SK Sharma, Roop Singh Dangi, Jan Mejay Sharma, SS Kushwah and Manoj Kumar Tarwariya

Abstract: A field experiment was conducted during 2017-18 and 2018-19 at ICAR- CPRI-RS, Gwalior M.P. during kharif and rabi to judge the effect of nutrients application on maize – potato cropping sequence. The experiment consisted of 8 treatments with four replications. The results revealed that application of residue based compost + Biofertilizers (Azotobactor and PSB) + VC @ 7.5 t/ha gave higher fresh root weight/plant (16.50 and 16.00 g/plant during 2017-18 and 2018-19, respectively) over remaining treatments at 30 DAS. However, application of 100% RDF NPK + FYM @ 25 t/ha gave higher fresh root weight at 60 DAS and maturity stage i.e. 48.25 and 41.75 g/plant, respectively during 2017. Application of 75% RDF NPK + 25% N through FYM and 75% RDF NPK + FYM @ 25 t/ha gave higher fresh root weight/plant at 60 DAS and maturity stage, respectively during 2018-19. Application of 100% RDF NPK + FYM @ 25 t/ha gave higher value of fresh plant weight at 30 DAS (174.50 and 178.75 g/plant), 60 DAS (472.75 and 460.25 g/plant) and maturity stage (539.25 and 541.50 g/plant) during 2017-18 and 2018-19, respectively. Application of residue based compost + Biofertilizers (Azotobactor and PSB) + VC @ 7.5 t/ha and residue based compost gave higher root: shoot ratio i.e. 0.068 and 0.69 during 2017-18 and 2018-19, respectively at 30 DAS. Residue based compost + Biofertilizers (Azotobactor and PSB) + VC @ 7.5 t/ha gave higher root: shoot ratio (0.073) during 2018-19 as compare to other treatments at maturity stage. Application of 75% RDF NPK + 25% N through FYM gave significantly higher use efficiencies viz. ANE, ENUE during both the years over 100% RDF NPK. Whereas, application of 100% RDF NPK gave higher PNE during 2018-19 compare to other treatments. Application of 100% RDF NPK + FYM @ 25 t/ha recorded higher cob (11.21 and 11.07 kg/14.4 m², stover (7.82 and 8.03 kg/14.4 m²), grain (7.61 and 7.91 kg/14.4 m²) and biological yield (14.70 and 15.80 kg/14.4 m²) of maize during 2017-18 and 2018-19, respectively compare to other treatments. Whereas, 100% RDF NPK recorded higher stover weight viz.7.82 and 8.03 kg/14.4 m² during 2017-18 and 2018-19, respectively compare to other. Whereas, application of 100% RDF NPK + FYM @ 25 t/ha gave higher haulm (18.48 and 24.66 kg/14.4 m²), tuber yield (46.47 and 51.24 kg/14.4 m²), biological yield (64.95 and 75.90 kg/14.4 m²) of potato and MEY of potato (19.57 and 18.08kg/14.4 m²) as well as system (27.38 and 26.18 kg/14.4 m²) during both the years. Maize fresh plant and root/plant weight was highly positive correlated with maize grain during both the years at all the stages of crop growth except at 30 DAS for root fresh weight/plant during both the years.

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