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Maximization of Seed Size Tuber Production in Early Bulking Potato (Solanum tuberosum L.) Variety Kufri Khyati

Year: 2017

Type: article

Abstract: A field experiment was conducted at ICAR Central Potato Research Station Gwalior, MP, during 2015-16 and 2016-17 to study the effect of intra-row spacing, nitrogen levels and date of haulm killing on production of higher proportion of seed size tubers in early bulking variety Kufri Khyati.Treatments consisted of two intra-row spacing (15 cm and 20 cm), two dates of haulm killing (70 and 80 days) and two nitrogen levels (120 and 150 kg ha -1 ).Treatments were replicated three times with split plot design.Germination percentage was significantly higher in 20 cm spacing (96.76%) over 15 cm spacing (88.12%).Non-significant differences were recorded among different parameters for growth attributes.Significantly highest seed size tuber and total tuber number was recorded in 15cm spacing (405000 ha -1 and 716000 ha -1 ) over 20 cm spacing (337000 ha -1 and 605000 ha -1 ) respectively.Non-significant but highest seed size tuber number (432000 ha -1 and 427000 ha -1 ) was recorded in 15 cm intra-row spacing×80 days haulm killing×150 kg N and 15 cm intra -row spacing×70 days haulm killing×120 kg N respectively.Seed size and total tuber yield (t ha -1 ) was in significantly higher 15 cm spacing (22.44 t ha -1 and 33.16 t ha -1 ) over 20 cm spacing (19.81 t ha -1 and 29.84 t ha -1 ).Significantly higher severe mosaic incidence (0.87%) was observed with 80 days haulm killing over 70 days.Hence 15 cm intra -row spacing×70 days haulm killing×120 kg N was most suitable for getting higher proportion of seed size tubers in Kufri Khyati.The tuber size profile can be reduced or expanded by altering inter and intra row seed spacing, controlling days of growth by planting late or killing vines/haulm early, regulating inputs like fertilizer and water, applying growth regulators, and manipulating seed tuber physiological age.Seed size influences the seed rate per hectare (Singh and Kushwah, 2010; Kumar et al., 2009b).The number of sprouts that develop from a seed tuber is influenced by the size of seed.Larger tubers generally produce more sprouts, but if larger seed is used, a greater weight of seed must be planted per unit Seed size tubers production, Kufri Khyati, potato

Source: International Journal of Bio-resource and Stress Management

DOI: 10.23910/ijbsm/2017.8.6.3c0128