Abstract
Cnidoscolus quercifolius is a common plant species with multiple uses from Brazilian semiarid area (BSA). Their seeds have dormancy. Fact that needs to be resolved in favor of the growing demand to produce seedlings of this species, mainly for the recovery of degraded areas in BSA. Non-acidic technologies such as water immersion and ultrasound are testing to promote uniform emergence and vigor for seeds and seedlings for many species. The objective of this paper was to test ultrasound and immersion in water as technique to promoter vigor and emergence in seeds and seedlings of C. quercifolius . Seeds of C. quercifolius were submitted to treatments using a 2 x 4 factorial scheme [F1 - Immersion in water for 24 h (without and with immersion) and F2 - time of exposure to ultrasound (0, 90, 180 and 270 s)], after they were sown in a bed and analyzed for 21 days with emergence and vigor measurements. Immersion in water for 24 hours is an efficient treatment to improve the vigor and emergence of C. quercifolius seeds and seedlings.
Highlights
There are some efforts to promote a sustainable production of forest essences from Caatinga biome, for example, studies in seedling formation (ANTUNES et al, 2014; ANDRADE et al, 2015; MENINO et al, 2015), bioecology (APGAUA et al, 2014), morphology (LOUREIRO et al, 2013), satellite analyses (SILVA et al, 2018), and thermal image (DIAS JÚNIOR, et al, 2019)
For the Anova test, we can understand about factor F1 that only the variables percentage of first count, and emergency (p
Ultrasound waves can be interesting to the C. quercifolius seeds and seedlings, but it must test to improved understand about it
Summary
Caatinga biome is a Brazilian formation forest with xerophytic plants, some different ecoregions (ANTUNES et al, 2014; APGAUA et al, 2014; ANDRADE et al, 2015; MENINO et al, 2015; SILVA et al, 2018), with high evapotranspiration, and concentrated rainfall in a short period. There are some efforts to promote a sustainable production of forest essences from Caatinga biome, for example, studies in seedling formation (ANTUNES et al, 2014; ANDRADE et al, 2015; MENINO et al, 2015), bioecology (APGAUA et al, 2014), morphology (LOUREIRO et al, 2013), satellite analyses (SILVA et al, 2018), and thermal image (DIAS JÚNIOR, et al, 2019). The Euphorbiaceae family is an important taxon present in Caatinga biome area (APGAUA et al, 2014; ANDRADE et al, 2015; MENINO et al, 2015; DRUMOND et al, 2016; DIAS JÚNIOR, et al, 2019) For some species in Caatinga species have dormancy and this fact can be disturbing the forest production and this fact is poorly studied (Medeiros et al, 2005) or are recommendation the acid treatments to improve the germination to broken the seed resistance in Euphorbiaceae family (LOUREIRO et al, 2013).
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