Investigations on Planting Methods and Nutrition on Growth, Yield and Quality of Vetiver (Vetiveria zizanioides (L.) Nash)
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Date
2017-06
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University of Agricultural Science, Dharwad
Abstract
A field investigation was conducted to evaluate the effect of planting methods and nutrition on growth, yield and quality of vetiver (Vetiveria zizanioides (L.) Nash Syn. Chrysopogan zizanioides) during July 2015- July 2016 at the Medicinal and Aromatic Plants Unit, Saidapur Farm, University of Agricultural Sciences, Dharwad, Karnataka. The experiment was laid out in split-plot design with three main plots (planting methods viz., P1– Ridge and furrow method, P2– Bed method and P3– Bag method) and six sub-plots (fertilizer levels viz., F1- 25:25:25 NPK, F2- 50:25:25 NPK, F3- 75:25:25 NPK, F4- 25:50:25 NPK, F5- 50:50:25 NPK and F6- 75:50:25 NPK kg/ha) comprising of eighteen treatment combinations replicated twice.
Planting methods and nutrition levels had significantly influenced all the growth and yield parameters. Among the planting methods, bag method (P3) recorded significantly higher yield parameters viz., root length (50.12 cm), number of roots per plant (316.97), fresh root weight (219.15 g/plant), dry root weight (95.06 g/plant), root yield per ha (4,085.78 kg/ha) and essential oil yield (85.34 kg/ha) compared to other planting methods. Among fertilizer levels, 75:50:25 kg NPK per ha (F6) recorded significantly higher root length (45.98 cm), number of roots per plant (260.97), fresh root weight (177.28 g/plant), dry root weight (86.32 g/plant), root yield per ha (3,453.19 kg/ha) and essential oil yield (73.32 kg/ha) than all other lower levels of fertilizers at 12 months harvest. Among interactions, the combination of P3F6 (Bag method with fertilizer levels of 75:50:25 kg NPK/ha) recorded significantly higher root length (55.91 cm), number of roots per plant (350.4), fresh root weight (238.30 g/plant), dry root weight (103.29 g/plant), dry root yield (4.33 t/ha) and essential oil yield (94.25 kg/ha) compared to all other interactions. The same treatment combination also registered maximum gross returns (Rs.5,63,357/ha), net returns (Rs. 4,15,295/ha) and B:C ratio (1:3.80).