Effect of nitrogen and cow dung on the growth of kalmegh (Andrographis paniculata)

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Research Paper 01/06/2018
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Effect of nitrogen and cow dung on the growth of kalmegh (Andrographis paniculata)

Shohana Parvin, Md. Giashuddin Miah, Tofayel Ahamed
Int. J. Biosci.12( 6), 152-163, June 2018.
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Kalmegh (Andrographis paniculata) is a well-known multifaceted medicinal plant used in both Ayurvedic and Unani system because of its immunological, antibacterial and hepatoprotective properties. A pot experiment was carried out to evaluate the response of kalmegh to various combinations of nitrogen and cowdung. There were 16 treatment combinations in the experiment comprising four levels of N (0, 20, 40, and 60 kg/ha) and four levels of cowdung (0, 15, 30, and 45 % cowdung on volume basis). Regarding growth parameters, the main and interaction effects of cowdung and nitrogen on plant height, number of leaf and branch per plant were created significant positive impacts. The highest plant height (66.60cm) was recorded from the highest combination of cowdung and N treatment (C45N60) followed by C30N60 treatment. The shortest plant (42.88cm) was found from the treatment, which received no cowdung and N fertilizer. Similarly the highest dry yield per plant of (74.8g) was noted from the highest combined application of C45N60. Regression analysis showed highly significant linear response of total plant yield to both cowdung and nitrogen level. Alternatively, regression analysis showed negative relationship between root dry weight and levels of cowdung and nitrogen throughout the growing period. Nitrogen content of kalmegh also showed similar responses where plant nitrogen content (3.26%) was the highest in the combined application of C45N60. The study revealed that, combination of 45% cowdung and 60 kg N/ha was considered to be the optimum level of cowdung and nitrogen for achieving the maximum growth and yield of kalmegh.


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