Growth and Yield Response of Shallot (Allium cepa L. Aggregatum Group) Cultivars from Seeds Propagation to Paclobutrazol Dosage Prahesti Elizani1,2- Endang Sulistyaningsih1*- Retno Pangestuti 1,3
1)Department of Agronomy, Faculty of Agriculture, Gadjah Mada University, Sleman, Yogyakarta, 55281, Indonesia
2) Agriculture and Food Security Office of Yogyakarta Special Region, Yogyakarta, 55163, Indonesia
3 )Assessment Institute for Agricultural Technology of Central Java Jln. Soekarno Hatta KM 26, No 10, Bergas, Kabupaten Semarang 50552, Indonesia
Abstract
The cultivation of shallots with seed propagation (TSS/True Seed of Shallot) is one of the efforts to resilience and healthy diets. Therefore, TSS becomes an alternative material planting of shallot in Indonesia. Aplication of paclobutrazol after maximum vegetative fase in shallot planted from seeds will inhibit vegetatif growth and accelerate translocation photosynthate to shallot bulbs. This research was arranged in RCBD with two factors and three blocks. The first factor was cultivars (Tuk Tuk, Sanren and Lokananta), and the second was the paclobutrazol dosages (0, 15, 30 and 45 mg L-1) which was applied twice at 20 and 35 dyas after planting (dap). All Data obtained were analyzed for α-=5% variance analysis and followed by DMRT α-=5% test. The results showed the applications of 15 and 30 mg L-1 paclobutrazol effectively inhibited the plant height at 40-50 dap and the number of leaves at 30-40 dap, but increased nitrat reductase activity at 30 dap, total leaf chlorophyll content during plant growth, net assimilation rate, plant growth rate, total dry weight, bulb number and productivity compare to the plants with application of 45 mg L-1 paclobutrazol and untreated plants. Sanren, Lokananta and Tuk Tuk showed potential higher yield with formation of 5.50, 3.17 and 2.49 bulbs per plants, respectively. The optimum paclobutrazol dosage was 22.75 mg L-1 with a productivity increased by 29.07% compared to untreated plants.
Keywords: paclobutrazol- yield- true seed of shallot
