Author(s):

Ankita Gudge, Dr. GS Rawat, Dr. SL JAT and Shweta Tiwari

Abstract: A field experiment was conducted at Experimental farm of ICAR-Indian Maize Research Institute, New Delhi during kharif seasons of two consecutive years (2016 and 2017) to study the growth and productivity of maize (Zea mays L.) under different cropping system, residue and nitrogen management. The treatments consisted two cropping system i.e Maize-wheat-mungbean-(MWMb), Maize-mustard-mungbean – (MMuMb), two residue management i.e. Permanent beds – without residue (PB-R), Permanent beds – with residue (PB+R) and four nitrogen management practices i.e. Absolute control - No fertilizer) - F₀)_, N through PU (Prilled urea) - F_1, N through SCU (S coated urea) - F_2, N through NCU (Neem coated urea)- F₃ in split – split- plot design with three replications. Maize variety DHM-117with 20 kg ha^-1 seed rate was sown at spacing 67 cm x 20 cm during both the years. Results shows that the variation in plant height of maize was significant between cropping system and recorded maximum plant height with MWMb as MMuMb. With regard to dry matter accumulation and leaf area index, MWMb system gave higher value which was significantly higher than MMuMb cropping system. The SPAD value was higher in MWMb cropping system than MMuMb. The residue incorporaion in permanent beds significantly increased plant height, dry matter accumulation, leaf area index and SPAD value as compared to without residue application in both the years. The highest length and width were found under MWMb cropping system which was significantly superior over MMuMb. Significantly more number of cob per hectare, more number of grains/row and higher test weight were recorded under MWMb cropping system as compared to MMuMb cropping system. Highest yields of grain and straw were recorded under MWMb cropping system over MMuMb cropping system. Residue incorporation caused significant effect on the grain and straw yield. The Residue incorporation in permanent beds of maize yielded higher over without residue in permanent beds.

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