[Productivity and quality of Calendula medicinal flowers in conditions of various providing with nutritive elements]
2006
Doroshkevich, E.I.(Grodno State Agrarian Univ. (Belarus))
The productivity of Calendula medicinal and quality of medicinal raw material in depending on a level of organic and inorganic fertilizers application is shown. The optimal dozes were both organic fertilizers 40 t/ha + N90P120K90 and organic fertilizers 80 t/ha + N60P90K60. It provides the yield of 14,4-14,6 c/ha of dry flowers with the content of 53,1-57,2% of extractive substances. Increase in dose of organic fertilizers from 40 to 80 t/ha accompanies by essential improvement of Calendula flowering intensity. The increase reaches 2,5-3,9 t/ha or 32,9-51,3% to the no manuring background.
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