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Title: Weed emergence in autumn under temperate conditions
Other Titles: Emergência de Plantas Daninhas no Outono em Condições Temperadas
Authors: Calado, José
Basch, G.
Carvalho, Mário
Keywords: seasonal emergence
Mediterranean climate
seed germination
soil moisture
Issue Date: Jun-2011
Publisher: Sociedade Brasileira da Ciência das Plantas Daninhas
Abstract: The emergence of weed plants depends on environmental conditions, especially temperature and soil moisture. The latter is extremely important in Mediterranean environments which are characterized by irregular amount and distribution of rain throughout the year, which influences the beginning of the growth cycle of the annual species (seed germination). This paper studies the influence of rainfall, in particular accumulated rainfall in autumn, on the emergence of weed plants. The experiment was carried out on Luvisols, and the appearance of flora under field conditions was observed. Through analysis of the results, it can be concluded that a high percentage of weed plants (>85% related to the highest registered value) was obtained with more than 90 mm of accumulated rainfall from the beginning of September. Thus, in those years in which this amount of rainfall (90 mm) is registered until the end of October, the appearance of potential weed plants can be ensured, under Mediterranean conditions, in a period before sowing the autumn-winter crops.
ISSN: 0100-8358
Type: article
Appears in Collections:FIT - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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