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Effects of Environmental Factors on Seed Germination and Emergence of Velvetleaf (Abutilon theophrasti) Planta Daninha
XIONG,RC.; MA,Y.; WU,HW.; JIANG,WL.; MA,XY..
ABSTRACT: Velvetleaf, an annual broadleaf weed, is a common and troublesome weed of cropping systems worldwide. Laboratory and field experiments were conducted to determine the effects of environmental factors on germination and emergence of velvetleaf. Seeds germinated over a range of constant temperatures from 10 to 40 oC regardless of light conditions, but no germination occurred at temperature below 5 oC and beyond 50 oC. Seeds germinated at alternating temperature regimes of 15/5 to 40/30 oC, with maximum germination (>90%) at alternating temperatures of 40/30 oC. Germination was sensitive to water stress, and only 0.4% of the seeds germinated at the osmotic potential of -0.4 MPa. There was no germination at ? 0.6 MPa. Moreover, germination was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Burial depth; Light; Osmotic potential; Saline and alkaline stress; Temperature.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100321
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