Reference : Impact of sowing density and nitrogen fertilization on Rumex obtusifolius L. developm...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
Life sciences : Agriculture & agronomy
Impact of sowing density and nitrogen fertilization on Rumex obtusifolius L. development in organic winter cereal crops
[en] Impact de la densité de semis et de la fertilisation azotée sur le développement de Rumex obtusifolius L. en cultures de céréales d'hiver conduites en agriculture biologique
Stilmant, Didier mailto [Centre Wallon de recherches agronomiques - CRA-W > Productions et filieres > > >]
Bodson, Bernard mailto [Université de Liège - ULiège > Sciences agronomiques > Phytotechnie des régions tempérées >]
Losseau, Céline [Université de Liège - ULiège > Sciences Agronomiques > > >]
Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE]
Presses Agronomiques de Gembloux
Yes (verified by ORBi)
[en] sowing density ; nitrogen fertilization ; rumex obtusifolius ; winter cereal ; cereals ; crop weed competition ; spelt ; triticum spelta ; triticosecale ; triticale ; weeds ; cultural control ; control methods ; fertilizer application
[en] The control of Rumex obtusifolius L. (broad-leafed dock) is very important in organic farming systems. Indeed, concerns about managing this weed without the use of herbicides is one of the major factors limiting the uptake of these systems by conventional farmers. Against this backround, we analyzed the impact of two management practices on the development of R. obtusifolius populations in two winter cereal trials: spelt (triticum spelta [L.] thell.) and triticale (xtriticosecale [A.Camus]Wittm.). The management factors were sowing density (SD) and nitrogen fertilization (NF) at the tillering stage. The results showed that and increase in SD and NF led to stronger crop growth and better soil coverage by the end of sping, demonstrated by a significant decrease in photosynthetic active radiation (PAR) at soil level. However, although there was an SD effect, it was too weak in April to restrict an increase in R. obtusifolius populations through the recruitment of new R. obtusifulius plants. An increase in R. obtusifolius population density was also linked to an increase in the NF level, illustrating the nitrophilic character of this weed. Although an increase in SD and NF at the tillering stage led to a higher canopy density, these two practices failed to reduce R. Obtusifolius density in the cereal crops. Nevertheless, cereal yields were shown to be maintained or improved. Our results indicate that, even when combining weed harrowing and some cultural weed control methods, this perennial weed is difficult to control.
Researchers ; Professionals

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