Author(s):

Ankita Gudge, GS Rawat, 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 physiological parameter of maize (Zea mays L.) under different cropping system, residue and nitrogen management. The treatments consisted two cropping system i.e Maize-wheat-mungbean-MWMu, 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 -Nofertilizer)- F₀)_, N through PU (Prilled urea) - F_1, N through SCU (S coated urea) - F_2, N through NCU (Neem coated urea)- F ₃ 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 dry matter accumulation (DMA) and leaf area index (LAI), MW Mb system gave higher value which was significantly higher than MM Mb cropping system. The SPAD value was lower in MMMu cropping system than MWMu. The permanent beds with residue incorpotaion significantly increased dry matter accumulation, leaf area index and SPAD value as compared to without residue application in both the years. The nitrogen management had significant effect on leaf area index in both the years. The Residue incorporation in permanent beds of maize yielded higher over without residue in permanent beds. It was noticed that the application of nitrogen by different sources increased compared with the control treatment. The nitrogen applied by Neem coated urea (NCU) recorded significantly higher NDVI, SPAD and minimum CTD value while absolute control recorded minimum NDVI and SPAD value.

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