National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted during kharif season, 2016 at S.V. Agricultural College, Tirupathi to study the ‘Influence of Agro-climatic indices on morphological and growth attributes of maize (Zea mays L.)’. The experiment was laid out in split plot design with twelve treatments. Three maize hybrids D.S 900M, Pinnacle and CP818 with four dates of sowing (June II FN, July I FN, July II FN and August I FN). The results indicated that the number of days to attain different phenological growth stages varied. The morphological attributes and growth attributes like plant height, Leaf area, LAI were highest for Pinnacle and June I sowing (D1). Among the hybrids higher leaf (15.6 g plant-1), stem (78.9 g plant-1), tassel (2.6 g plant-1) and cob weight (177 g plant-1) was observed in D.S 900M on par with Pinnacle and CP818. Among the dates of sowing significantly higher leaf (21.6 g plant-1), stem (95.9 g plant-1), tassel (3.2 g plant-1) and cob weight (192 g plant-1) was observed in D1 (June II FN). Variabilty in morphological and growth attributes tested maize hybrids at different dates of sowing is attributed to variability in crop requirement of temperature and photoperiod viz., Growing degree days (GDD), Photothermal Units (PTU) and Heliothermal units (HTU) especially at grand growth phase stage of maize.
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