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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/387

Title: Cropping systems development with Solanum xanthocarpum in Mahaweli system C of Sri Lanka
Authors: Ratnayake, H H
Bandara, K M C
Weerasinghe, A S P
Keywords: Solanum xanthocarpum
Medicinal plants
Issue Date: 19-Jun-2013
Abstract: Field experiments were conducted in alfisols for 2 years to study the agronomic feasibility of adopting Solanum xanthocarpum, a popular plant expectorant presently imported, into the traditional upland cropping patterns in the Mahaweli System C of Sri Lanka in the wet season (Maha). Two levels of plant population/spacing and four nitrogen fertilizer rates were investigated. Sequentially, mung bean (Vigna radiata L.) was planted in the drier season (Yala) with the recommended cultural package. Closer plant spacing (45 cm* 15 cm versus 45 cmx 50 cm) produced more dry matter yield with higher leaf area index. Branching was less in closer plant spacing with shoot.root ratio unaffected (P = 0-05). Harvesting 3 &1/2 months after planting was more productive than 2 weeks earlier or later when nitrogen was applied. Yield response to nitrogen was greater in denser plant populations. Application of 80 kg nitrogen/ha secured yields over 4 tonnes/ha, which was comparable with yields from 120 kg nitrogen/ha in closer spacing (148 000 plants/ha) in one season. These two levels of nitrogen produced statistically similar leaf area indices, branching and shoot:root ratios (P=0-05). Mung bean yields, which ranged from 797 kg/ha to 963 kg/ha, showed no clear correlation with the treatments applied to the first crop.
URI: http://hdl.handle.net/123456789/387
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