Phalaris arundinacea at its altitudinal maximum in the Czech Republic: effect of cutting on carbohydrate and nitrogen content in rhizomes
1996
Klimesova, J. (Academy of Sciences of Czech Republic, Trebon (Czech Republic). Inst. of Botany)
Concentrations of total non-structural carbohydrates (TNC) and of total nitrogen (N) were determined in June, July, August, November 1990 and June 1991 in rhizomes of Phalaris arundinacea in the Hruby Jesenik Mts (The Sudeten, Czech Republic). The stands were situated at two altitudes: the altitudinal maximum of P. arundinacea in Mala Kotlina Cirque (1150-1350 m a.s.l.); and in the foothills at Mala Moravka village (700 m a.s.l.). The TNC and N concentrations in rhizomes were the same at both localities. The TNC concentration varied during the year, the minimum occurring in June and the maximum in November. The minimum nitrogen concentration was measured in August while its maximum was in June. The stands in the Mala Kotlina Cirque were subjected to the following treatments: (1) no cut, (2) cut in June, (3) cut in August, and (4) cut in both June and August. The cut plants stored less TNC and N in comparison with uncut ones. A more severe reduction in the rhizome content of TNC and N was found in plants cut in August and in plants cut both in June and August
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