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 |
Enhancing crop productivity through agronomic interventions is the mainstay to improve economic and food security situation in India. Revisiting the planting densities using the modern genotypes and revealing its physiological responses and yield benefits is need of the day. The outcome proved to be a viable option to double the farmers income in a short span. Hence, a field experiment was conducted during kharif season, 2018 and 2019 at S.V. Agricultural college, Tirupathi to study the “Physiological responses of variable growth habit of groundnut (Arachis hypogea L.) genotypes at different planting densities”. The experiment was laid out in split plot design with twelve treatments comprising three groundnut Spanish bunch genotypes Kadiri 6 (Erect), Kadiri 9 (Decumbent 2) and Dharani (Decumbent-3) sown at four spacings (30x10 cm, 30x5 cm, 20x10 cm and 20x5 cm). Among the Spacings 20X10 cm (50 plants m-2) recorded significantly higher (3,616.87 kg ha-1) followed by 20x5cm (3,157.07 kg ha-1) and significantly lower pod yields in 30x5 cm (2,540.07 kg ha-1) and recommended spacing 30X10cm (2,904.87 kg ha-1). Among the three varieties Decumbent-3, Dharani recorded highest pod yield (3403.48 kg ha-1) followed by Decumbent-2 type, kadiri-9 (3292.65 kg ha-1) and least by Erect type, Kadiri-6 (2467.94 kg ha-1). Dharani was significantly higher than Kadri-6 and kadiri-9 due to increased leaf area Index and higher Crop Growth rate during grand growth phases which is largely determined by the size of leaf area, dry matter and its distribution with time, ultimately determining the yield. Decumbant growth habit Spanish bunch groundnut genotypes can well fit into increased planting densities to achieve higher production in unit land area.
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