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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Methods of regulation the occurrence thaliana violet (Viola arvensis Murray) on arable land
 MACHÁČEK, Václav
Due to repetitive planting of certain crops in the crop rotation process, there came to be a loss of certain weed species on the cultivated land, but because of this, a small selected number of species, because of there frequency and abundance, played an import role in the cultivated soil, (or harvest). Currently one of these weed species is the violet thaliana, which occurs in all cultivated crops, especially cereals and oilseeds. The significance of this harmful average weed is increasing significantly. Therefore an attempt was established on the farm, DZV Nova Bystrice. The aim of this experiment is to regulate thaliana violet (Viola arvensis Murray) on arable land.
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Adventitious sprouting of short-lived plants in natural populations
 MALÍKOVÁ, Lenka
Disturbance is one of most important selective factor causing removal of plant biomass. Man-made habitats are characterized by strong and unpredictable disturbances, providing bare soil surface colonized by plants with short life cycle. Populations of the short-lived plants are, however, vulnerable to the strong disturbance removing all stem parts with reserve axillary meristems in the case it occurs before plant flowering and fruiting. Nevertheless, 2 % of annual and 14 % of biennial plants are able to overcome meristem limitation by adventititous sprouting from hypocotyle or/and roots. This thesis is composed of four original studies describing the occurrence of adventitious sprouting in natural populations of 22 monocarpic weeds of Central Europe and one species in Indonesia. The studied phenomenon was analyzed in relation to various environmental factors and plant traits in the field and in experimental conditions.
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