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Axillary bud viability and dry matter production of Poa ligularis in Patagonian grasslands: (with 1 table & 4 figures) Phyton
Souto,CP; Becker,GF; Siffredi,GL; Busso,CA; Sternberg,M.
Poa ligularis Nees is one of the dominant perennial grass species in Patagonian grasslands. This is the first field study which investigated the effects of defoliation frequency on its number of viable axillary buds, and subsequent dry matter production during one growing season. Experiments were arranged in a randomized complete block design. Treatments included one defoliation height (10 cm), from one to five times a year, and undefoliated controls. Bud respiratory activity was examined usingthe tetrazolium test and the vital stain Evan's blue. At the end of the growing season, plants that have been defoliated more than three times showed significatively (p<0.05) lower number of respiratory active buds than unclipped controls. A high defoliation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Defoliation; Poa ligularis; Axillary buds; Semiarid Argentina; Dry matter production; Patagonia.
Ano: 2004 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100004
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