Effect of Head Manipulation Techniques and Planting Distance on Seed Yield and Quality in Cabbage (Brassica oleracea var. capitata L.)

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Date
2016-07
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College of Forestry, Ranichauri Campus, V.C.S.G Uttarakhand University of Horticulture and Forestry, Bharsar
Abstract
The present investigation was conducted during late Kharif of 2014 and late Rabi of 2015 at the experimental farm of Department of Vegetable Science and Seed Testing Laboratory of Department of Seed Science and Technology, V.C.S.G. Uttarakhand University of Horticulture and Forestry, Ranichauri Campus, Tehri-Garhwal with Golden Acre cultivar of cabbage. The field experiment was laid out in Factorial Randomized Block Design with four replications. The factors comprised of combination of three head manipulation techniques viz., stump method (T1), stump with central core intact method (T2) and head intact method (T3) and four planting distance viz., 60x60 cm (S1), 60x45 cm (S2), 45x40 cm (S3) and 40x30 cm (S4). Observations recorded for field parameters were days to 50 per cent flowering (DAT), days to seed maturity (DAT), number of primary branches per plant, number of siliqua per primary branch, number of siliqua per plant, number of seeds per siliqua, seed yield per plant (g), seed yield per hectare (q), while seed quality parameters were recorded for 1000 seed weight, first count (%), standard germination (%), seedling root length (cm), seedling shoot length (cm), seedling length (cm), seedling fresh weight (g), seedling dry weight (g), seedling vigour index-I and seedling vigour index-II. Among the different head manipulation techniques, stump method (T1) exhibited earliest flowering (92.75 DAT) and seed maturity (140.56 DAT), maximum number of primary branches per plant (47.12), siliqua per primary branch and per plant (65.81 and 3121.00, respectively), seed yield per plant and per hectare (20.21 g and 9.01q, respectively). For seed quality parameters stump method was found promising for first count (85.0 %), standard germination (91.06 %), seedling length (14.0 cm) and seedling vigour index-I (1315.18). Among planting distance, 40x30 cm was found promising for days to 50 per cent flowering (102.0 DAT), seed maturity (154.0 DAT) and seed yield per hectare (9.99q). Wider plant spacing gave better seed quality but seed yield per unit area was low. The interaction effect also revealed that higher seed yield per plant was observed in combination of stump method along with 60x60 cm (23.03 g) while maximum seed yield per hectare was obtained with stump method along with 40x30 cm (10.50 q). Therefore, stump method in combination with planting distance of 40x30 cm is recommended for commercial seed production of cabbage in mid-hills of Uttarakhand.
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