Efeitos alelopáticos do exsudado radicular de <I>Amaranthus cruentus</I> L. sobre sementes de <I>Glycine max</I> (L.) Merril, <I>Zea mays</I> L. e <I>Bidens pilosa</I> L. DOI:10.5007/2178-4574.2011n40p13

Abstract

*Autor para correspondência. Agência financiadora: Fundação Araucária.Este artigo é de Acesso Livre, disponibilizado sob os termos da Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/) que permite uso não-comercial, distribuição e reprodução em qualquer meio, desde que este trabalho original seja devidamente citado. specie has great nutritional value because of its high protein content, and contain important minerals for alimentation. Consequently, the cultive of this cereal is extremely important, the consortium system is a way to guarantee the introduction of this species in the region cultivation. The objective was to know the allelopathic effects in consortium simulation of amaranth-soybean and amaranth-corn, besides the interaction between the invader beggarticks and the amaranth. For the exudate preparation, 50 amaranth seeds were germinated under moistened filter paper with 5mL of destilated water in Petri dishes, that were stored in germination chambers at 25ºC, with photoperiod of 12 hours of light. After five days, the seedings were removed and the same substrate was used to germinate the species studied. Also, the contrary was made, in which the germinated seeds of the agricultural species gave place to the amaranth seeds. The experimental design was entirely casualized, and the data was submitted to variance analysis and the means compared by the Tukey test (p<0,05). None of the agricultural species showed sensitive to the amaranth effects, in the same conditions however, the beggarticks raised increased the length of the shoot. Only the corn exudate offers negative effects on the amaranth initial development. Therefore those consortium simulations must be field analyzed to prove such effects.

Alelopatia de Ambrosia artemisiifolia na germinação e no crescimento de plântulas de milho e soja

“…Os resultados deste trabalho estão de acordo com os obtidos por Pinto et al (2011) com exsudato radicular de Amaranthus cruentus L. também com a soja. Esta observação sugere que esta cultura apresenta baixa sensibilidade no processo germinativo aos exsudatos radiculares de algumas espécies infestantes.…”