EFFECT OF MICROBIAL INOCULANTS ON GROWTH OF PAPAYA (Carica papaya L.) Cv. RED LADY SEEDLINGS UNDER POLYHOUSE CONDITIONS
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Date
2018-08-01
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University of Agricultural Sciences, Bangalore
Abstract
A study was conducted to find out the effect of microbial inoculants on growth of papaya seedlings under polyhouse condition at UAS, Bengaluru during the year 2017-18. Papaya (Carica papaya L.) is an important fruit crop of tropical world and has long been known as wonder fruit of the tropics. It belongs to the family Caricaceae. To improve the seedling quality, a nursery study was conducted to select the suitable bio-inoculants for growth of papaya seedlings. The bio-inoculants such as Glomus fasciculatum,
Pseudomonas fluorescence, Azotobacter chroococcum, Azospirillum lipoferum were isolated and inoculated individually and in combinations. Seedlings were kept at 120 days under polyhouse conditions. Among them, early seed germination (5 days) in treatment with Glomus fasciculatum + Pseudomonas fluorescence + Azotobacter chroococcum + Azospirillum lipoferum (T11) was recorded. This treatment also influenced most of the growth parameters positively, Viz. higher plant height (63.21 cm at 120 DAS), higher number of leaves (15.35 at 120 DAS), more leaf area ( 72.37 cm2 at 120 DAS), more number of roots per plant (16.33), higher root length (15.67 cm), higher fresh (73.83 g) and dry weight (3.83 g) of roots per plant and highest chlorophyll content (22.4 mg). Thus, it can be concluded that, the combined inoculation of bio-inoculants are beneficial for increasing the growth and quality seedling production in papaya Cv. Red Lady.