Production of Tuberose (Polianthes tuberosa L.) as Affected by Bulb Size and Planting Medium
Muhammad Zamin1*, Anees Muhammad1, Ibadullah Jan1, Hidayat Ullah1, Shahen Shah2, Muhammad Amin3 and Haroon Ur Rashid4
Tuberose is an important element of a landscape garden. It is placed among top ten cut flowers in floriculture industry. Quality production of cut flowers for market depends upon bulb size and growing medium. To investigate the best type of planting medium and suitable bulb size for commercial production of tuberose, an experiment was conducted in the Horticulture Nursery, University of Swabi, Pakistan in the year 2019. Three bulb sizes of tuberose viz., large (2.5cm dia), medium (1.5cm dia) and small (1cm dia) were planted in three type of planting media viz., M1(Sandy soil+ Compost; 3:1; v/v), M2 (Sandy soil+ Humic acid; 20:1; v/v) and M3 (Sandy soil + Potting soil; 3:1; v/v) in Randomized Complete Block Design (RCBD) with 3 replications. Significant differences were found in all the agronomic and floral characteristics of tuberose for both planting medium and bulb sizes. Tallest (43.08 cm) plants, maximum number of leaves plant-1 (22.17), florets spike-1 (22.79) and number of bulblets produced plant-1 (22.03) were found in soil amended with humic acid. However, the least days (85.22) to flowering were observed in planting medium amended with potting soil and largest bulblets (2.14cm) were found in compost amended sandy soil. As far as the effect of bulb size is concerned, maximum days to flowering (97.44), plant height (43.29cm), number of leaves (24.54), number of florets (19.17), bulblets plant-1 (24.30) and bulblet diameter (2.08 cm) were produced by growing large sized bulbs.
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