Morfogênese da grama-tapete em resposta à adubação com dejeto líquido de suínos

Travi, Magdalena Reschke Lajús; Scheffer-Basso, Simone Meredith; Escosteguy, Pedro Alexandre Varella; Brustolin, Karen Döering; Zabot, Valdirene; Miranda, Manoel Albino Coelho de

doi:10.1590/s0103-84782014000300012

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“…It is still little cultivated in Brazil for ornamental purposes; however, it shows expansion potential for its decorative effect, hardiness and resistance to trampling and cold. Travi et al (2014) reported that A. affinis is one of the most important grass species in native pastures of Southern Brazil, besides being aggressive and resistant to trampling and cold.…”

Section: Introductionmentioning

confidence: 99%

Influence of environmental factors on carpetgrass seed germination

Pereira¹,

Souza²,

Costa³

et al. 2016

Afr. J. Agric. Res.

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The aim of this study was to verify the influence of temperature, light, substrate, sowing methods, and salt and water stress on carpetgrass (Axonopus affinis, in the Poaceae family) seed germination. All four trials were performed in a germination chamber under controlled conditions of temperature, moisture and photoperiod. Experimental designs were entirely randomized with 100 seeds per plot. For the study of temperature and light (Experiment 1), treatments were arranged in a 6 x 2 factorial scheme, with six temperature regimes (constant at 20, 25, 30, and 35°C, and alternate at 20 to 30 and 20 to 25°C) combined with two light conditions (light: 8 h of light and 16 h of dark, and dark: 24 h without light) and four replications. For the study of substrate and sowing methods (Experiment 2), there were four treatments (on paper, between paper, on sand, and in sand) with five replications. For the study of salt stress (Experiment 3), there were five treatments, composed of NaCl concentrations (0, 25, 50, 75 and 100 mM), with four replications. For the study of water stress, treatments were arranged in a 3 x 2 factorial scheme (Experiment 4), with three substrate water contents (50, 75 and 100% water retention capacity) and two sowing methods (on sand and in sand), and four replications. Germination percentage and rate were evaluated. It was concluded that seed germination was more effective at the alternate temperatures of 20 to 30 and 20 to 35°C, under light, sown on sand, on a paper substrate or between papers. The NaCl concentrations did not affect germination percentage; however, germination was slower as the NaCl concentration increased. Faster and higher germination occurred when seeds were sown on sand at 100% of its water retention capacity.

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Section: Introductionmentioning

confidence: 99%