Author(s): S. ADHIKARY, M. RAY AND D. C. ROY

Abstract: The present study was conducted during two consecutive rabi seasons of 2016-17 and 2017-18 at the Central Research Farm, Gayeshpur, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India. Objectives are to identify the suitable maize hybrid during rabi season for New Alluvial Zone of West Bengal and also to find out the dose of seaweed sap (Biozyme) for maize hybrids and their interaction effect of maize hybrids with seaweed sap (Biozyme) on growth and yield. The experiment was laid out in split plot design with three maize hybrids (Kaveri 50, P 3396 and HQPM 1) in the main plots and four levels of seaweed sap (biozyme) in sub-plots, no biozyme or water spray; 1 ml l-1; 2 ml l-1 and 3 ml l-1 of water was sprayed twice at 25 and 50 Days After Sowing (DAS) in addition to recommend dose of fertilizer. Growth parameters like plant height, number of green leaves/plants, Leaf Area Index (LAI), dry aerial biomass of maize hybrids varied significantly at 50 DAS onwards and the maximum values of those parameters including Crop Growth Rate (CGR) and Relative Growth Rate (RGR) were recorded in the hybrid P 3396 while HQPM 1 gave the least value at all the growth stages. Plant height, green leaves plant-1 and LAI increased gradually with the increase of biozyme from 1 ml l-1 to 3 ml l-1 at 50 DAS onwards and attained maximum at 3 ml l-1 while the higher dry aerial biomass, CGR and RGR was obtained with biozyme at 2 ml l-1 of water. Among the hybrids significantly highest grain yield (8.12 t ha-1) and HI (41.92%) were obtained from P3396 whereas Kaveri 50 gave highest stover yield (11.97 t ha-1). In case of see weed sap (biozyme) 2 ml l-1 resulted significantly the maximum grain yield, stover yield and harvest index (7.22, 11.83 t ha-1, 37.47%, respectively) and the least value of all the above was obtained in HQPM 1. Regarding interaction of variety and biozyme, the effect was significant and the maximum grain yield (8.55 t ha-1) and harvest index (42.85%) were observed in the combination of P 3396 x biozyme (2 ml l-1) while highest stover yield (12.35 t ha-1) was recorded from Kaveri 50 x biozyme (2 ml l-1).

DOI: 10.22271/09746315.2021.v17.i2.1447

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