Abstract
The experiment was conducted at the Agricultural Research Field of International University of Business Agriculture and Technology, Dhaka during the period from August to October 2020 to investigate the response of different doses of nitrogen fertilizer on the growth and yield of Kangkong (Ipomoea reptans poir). The experiment consisted of four nitrogen fertilizer levels viz. T0: no fertilizer, T1: 60 kg nitrogen fertilizer, T2: 80 kg nitrogen fertilizer, and T3: 100 kg nitrogen fertilizer per hectare. The result revealed that plant height, number of leaves per plant, number of branches per plant, fresh weight per plant, dry weight per plant, root length per plant, fresh weight of root per plant, dry weight of root per plant, yield per plot and yield per hectare grown under different doses of nitrogen fertilizer viz. control (T0), 60 kg N per hectare (T1), 80 kg N per hectare (T2), showed significant reduction than those grown in 100 kg N per hectare (T3). The experiment was conducted following Randomized Complete Block Design (RCBD) with four replications. The application of different doses of nitrogen significantly influences the growth and yield of Kangkong. The maximum plant height, number of leaves, number of branches, fresh weight per plant, root length was obtained from T3 treatment while the minimum was found from the control treatment (T0) at 60 days after sowing. The highest yield (17.87 t/ha) was performed from the treatment T3 and the lowest yield (11.83t/ha) was obtained from the control treatment where no nitrogen was used.
Highlights
Kangkong (Ipomoea reptans poir) a leafy vegetable crop is grown in Bangladesh belongs to the family Convolvulaceae
Spinach is usually recommended for the enrichment of the human diet, but the crop cannot be grown during the summer and rainy season in Bangladesh, while a Sharmin et al, / American Journal of Pure and Applied Biosciences, 3(4), 98-105, 2021 serious scarcity of vegetables prevails during that time
The experiment was conducted to investigate the influence of different levels of nitrogen on the growth and yield of kangkong (Ipomoea reptans poir)
Summary
Kangkong (Ipomoea reptans poir) a leafy vegetable crop is grown in Bangladesh belongs to the family Convolvulaceae. Leafy vegetable of 100 g of its edible portion contains 87.6 g water, 1.1 g minerals, 0.1 g fat, 9.4 g carbohydrates, 107 mg calcium, 3.9 mg iron, 10740 microgram carotene, 0.14 mg vita-min B1, 0.40 mg vitamin B2, 42 mg vitamin C, 1.8 g protein and 46 kilocalories. Since it requires low input, easy to grow, and is suitable for growing in summer, its cultivation should be increased. Among the nutrient required by plants in a large amount, nitrogen is the most essential and at the same time, one of the most important growth factors in controlling yield and quality of most vegetable crop (Karim et al, 2021; Qamar et al, 2018)
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