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Registros recuperados: 3
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Effect of post-fire defoliation on growth of two native grasses in the Caldenal, Argentina Phyton
Peláez,DV; Bóo,RM; Mayor,MD; Elia,OR; Martínez,SA.
Plant growth in semiarid rangelands may be affected by time grazing is excluded during the post-fire regeneration period. The objective of this field work was to study the effect of post-fire defoliation at different phenological stages [vegetative (early-season defoliation) and internode elongation (late-season defoliation)] on growth of Piptochaetium napostaense and Poa ligularis, two very important perennial native grasses in the temperate semi-arid region of central Argentina (Caldenal). In general, the post-fire defoliation treatments did not affect the number of green leaves on tillers of P. napostaense. Early-season post-fire defoliation generally reduced the number of green leaves on tillers of P. ligularis in comparison to those in control plants....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Piptochaetium napostaense; Poa ligularis; Caldenal; Grass growth; Post-fire resting.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000100004
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Influence of woody species on aerial growth of perennial grasses in semi-arid rangelands of central Argentina Phyton
Blazquez,FR; Peláez,DV; Andrioli,RJ; Elia,OR.
The interaction between woody and grass species in semi-arid rangelands of central Argentina was assessed through the evaluation of the impact of woody species on grass growth over a 2-y period. The study comprised two morpho-physiologically different woody species and two cool-season perennial grass species highly preferred by domestic livestock. The study involved the assessment of total green length (TGL) and number of green leaves (NGL) per tiller in grasses growing beneath the canopy of woody species and in open rangeland areas. Soil temperature, pH and water, nitrogen, phosphorus and organic matter content were estimated at the same study sites. Precipitation during the study period was also recorded. Woody species induced higher TGL of grasses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canopy architecture; Soil temperature; Soil water content; Tiller green length.
Ano: 2014 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200023
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The influence of controlled fires on a plant community in the south of the Caldenal, and its relationship with a regional state and transition model Phyton
Tizón1,FR; Peláez,DV; Elía,OR.
Fire plays a fundamental role in the structure of vegetation communities in the Caldenal. However, this effect has decreased considerably since the introduction of domestic cattle, which reduces the amount of fine combustible material. Objectives of this study were (1) to analyze the diversity and composition of a typical vegetation community in the south of the Caldenal after exposure to different fire frequencies, and (2) to show the convenience of using controlled fire for reversing the processes of scrub formation to states with more diverse and productive grassland communities. Forty-five herbaceous and woody species were recorded. Treatment C (control) showed the greatest richness and diversity in December 2006 and 2007. After the last controlled...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vegetation communities; Post-fire effects; Caldenal; Semi-arid region; Cattle production.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200005
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