Data/hora: 09/06/2024 04:22:25

Provedor de dados: | Anais da Academia Brasileira de Ciências
País: | Brazil
Título: | Pequi leaves incorporated into the soil reduce the initial growth of cultivated, invasive and native species
Autores: | ALLEM,LAÍSA N.; GOMES,ANABELE S.; BORGHETTI,FABIAN.
Data: | 2014-12-01
Ano: | 2014
Palavras-chave: | Allelopathy; Caryocar brasiliense; Cerrado; Phytotoxicity; Tabebuia impetiginosa; Urochloa decumbens.
Resumo: | Studies have identified the phytotoxicity of many native species of the Cerrado; however, most of them were conducted either in inert substrates, or using exaggerate proportions of plant material. We investigated the phytotoxicity of pequi leaves added to substrate soil in quantities compatible with the litter produced by this species. Pequi leaves were triturated and added to red latosol in concentrations of 0.75%, 1.5% and 3%; the control was constituted of leafless soil. These mixtures were added to pots and irrigated daily to keep them moist. Germinated seeds of the cultivated sorghum and sesame, of the invasive brachiaria and of the native purple ipê, were disposed in the pots to grow for five to seven days at 30°C within a photoperiod of 12 h. Seedlings of all the species presented a reduction in their initial growth in a dose-dependent way. In general, the root growth was more affected by the treatments than the shoot growth; moreover, signs of necrosis were observed in the roots of the sorghum, sesame and brachiaria. The phytotoxic effects generated by relatively small quantities of leaves, in a reasonable range of species within a soil substrate, suggest potential allelopathy of pequi leaves under natural conditions.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401761
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201420130420
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.86 n.4 2014
Fonte: | info:eu-repo/semantics/openAccess