Influence of nutrient levels on growth, yield and quality of kalmegh (AndrographispaniculataNees.) under ratooning
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Date
2016-06
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University of Horticultural Sciences, Bagalkot (COLLEGE OF HORTICULTURE, BENGALURU)
Abstract
The field experiment was conducted on “Influence of nutrient levels on growth, yield and quality of kalmegh (AndrographispaniculataNees.) under ratooning” at College of Horticulture, University of Horticultural Sciences Campus, GKVK, Bengaluru during August, 2015 to February, 2016.
The experiment was laid out in Factorial Randomized Complete Block Design with nine treatments and three replication. The ‘IIHR local’ variety was used for experiment with three levels of nitrogen (75 %, 50 % and 25 %) and three levels of potassium (No potassium, 50 %and 100 %)
Among nitrogen levels, the 75 per cent nitrogen recorded maximum plant height (26.01 cm), number of primary branches (14.98), plant spread (408.13 cm2), dry herb yield (1.96 t ha-1), andrographolide content (2.18 %) and yield (42.79 kg ha-1) in first ratoon crop and were at par with 50 per cent nitrogen. The similar trend was followed in second ratoon crop. Nutrient uptake, optimum agronomic and nutrient use efficiency were recorded with 75 and 50 per cent nitrogen level.
The 100 per cent potassium recorded maximum plant height, number of primary branches, plant spread, dry herb yield, andrographolide content and yield, nutrient uptake by plant, optimum agronomic and nutrient use efficiency as compared to other potassium levels in both the ratoon crops. The highest B:C ratio of 1.99 and 2.38, net return of Rs 82,783 and 98,983 were recorded with combination of 25 tonnes FYM ha-1. + 75 per cent N + 100 per cent K in first and second ratoon crops, respectively.