Abstract
A few years ago, concerns about the need to recover degraded areas and to restructure the landscape began. One of the difficulties to produce native seedlings, among several factors, is the dormancy of the seeds of some species because even in favorable environments the seeds do not germinate. The objective of this study was to evaluate the influence of different methods of overcoming dormancy in the emergence of two species of the Fabaceae family, native to the Cerrado of the northeast of Mato Grosso do Sul, Brazil. Seven treatments were used for both species, where there was a combination of scarification with immersion in water. The dormancy break methods applied to interfere with the germination percentage and the emergence velocity index for both species. To Dimorphandra mollis, the best treatment is a scarification opposite to the hilum followed by immersion in water for 9 hours. To Hymenaea stigonocarpa, the use of at least two scarifications followed by immersion in water favors the percentage of germinated seeds while, two lateral scarifications to the hilum, combined with immersion in water, favors the velocity of the emergence of these seeds.
Highlights
The concern with the need to recover degraded areas and with the landscape restructuring in Brazil has intensified in recent decades, as well as the recovery actions
To Hymenaea stigonocarpa, the use of at least two scarifications followed by immersion in water favors the percentage of germinated seeds while, two lateral scarifications to the hilum, combined with immersion in water, favors the velocity of the emergence of these seeds
One of the obstacles found for the effectiveness of these actions is the little knowledge about the forestry of native species, mainly in terms of to the processes involved in the production of these seedlings (Negri et al, 2008)
Summary
The concern with the need to recover degraded areas and with the landscape restructuring in Brazil has intensified in recent decades, as well as the recovery actions. To use and preserve this biome, you need to know your phytophysiognomies, as well as the species that compose them (Sano et al, 2008) In this biome the species of the Fabaceae family are representative in diversity and in addition to having economic and ecological importance, being constituted in its majority by tropical trees (Sprent, 2001). In the face of biodiversity in Brazil, there is few information about the native species and their propagation forms (Maranho and Paiva, 2012) In this context, this research aimed to evaluate the influence of different overcoming dormancy methods in the emergence of two species of the Fabaceae family, native to the Cerrado of northeastern of Mato Grosso do Sul, Brazil
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