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| LIMA,M.F.P.; DOMBROSKI,J.L.D.; FREITAS,F.C.L.; PINTO,J.R.S.; SILVA,D.V.. |
| ABSTRACT The capacity of a weed to adapt to the restriction of growth factors is directly related to its ability to compete for those resources with the cultivated species. An experiment was conducted to evaluate the effect of water restriction on the growth and biomass partitioning of four species of weeds. The experimental design used randomized blocks, with five replications. The treatments were arranged in a 4 x 2 factorial, with the first factor being the weed species (Waltheria indica, Crotalaria retusa, Cleome affinis and Commelina benghalensis) and the second, two water regimes: daily irrigation (Irr) and water restriction (WR). The number of leaves, leaf area, dry mass of the plant and its parts (root, stem and leaf), and the mass distribution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waltheria indica; Crotalaria retusa; Cleome affinis; Commelina benghalensis; Soil water deficit. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400701 |
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| Maia,Lisanka Angelo; Pessoa,Clarice Ricardo de Macedo; Rodrigues,Angélica Fernandes; Colegate,Steven; Dantas,Antônio Flávio Medeiros; Medeiros,Rosane Maria Trindade; Riet-Correa,Franklin. |
| The aim of this study was to determine the duration of the resistance after the end of the ingestion of non-toxic doses of Crotalaria retusa seeds. Ten sheep were divided into 3 groups of 3 animals each and a control group with 1 sheep. To induce resistance, sheep in groups 1, 2 and 3 received 20 daily doses of 2g kg-1 of C. retusa seeds, followed by 7 daily doses of 4g kg-1. To determine the duration of resistance the sheep in groups 1, 2 and 3 were challenged orally, 3, 7 and 15 days, respectively, after receiving the last dose of 4g kg-1, with a single dose of 5g kg-1. Sheep of groups 1 and 2 did not develop overt signs of poisoning. Two sheep of group 3, challenged 15 days after the end of the resistance induction period, showed signs of acute... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crotalaria retusa; Dehydropyrrolizidine alkaloids; Monocrotaline; Sheep; Resistance to poisoning. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000600017 |
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