Abstract
The objective of this study was to evaluate the influence of using physical protectors on the emergence and initial growth of Baru seedlings in a direct sowing system. The experiment was installed in a randomized complete block design, testing the use of physical protectors (no protection, P0; plastic cup (500 mL) without the bottom, P1; laminated wood, P2), with 12 repetitions. Weekly soil temperature monitoring was carried out in the morning and in the afternoon in the period between 14 and 56 days after sowing (DAS). Daily emergence follow-up was also performed, and the stem diameter, total height and number of leaves were measured at 81 DAS. The use of physical protectors in the direct seeding of Baru interfered in the soil surface temperature on the sowing point, on the seedling emergence speed index, seedling survival, stem diameter and seedling height. Implementing protectors slowed the seedling emergence speed, however it provided higher percentages of emergence, survival and greater growth in diameter and height.
Highlights
IntroductionDipteryx alata (known as Baru, Cumbaru or Cumaru), belong to the Fabaceae family and is a native species of wide occurrence in the cerrado biome (Lorenzi, 1992)
Dipteryx alata, belong to the Fabaceae family and is a native species of wide occurrence in the cerrado biome (Lorenzi, 1992)
The biometric parameters evaluated were influenced by the use of a physical protector at the sowing point, except for the number of leaves and the emergence rate (Table 1)
Summary
Dipteryx alata (known as Baru, Cumbaru or Cumaru), belong to the Fabaceae family and is a native species of wide occurrence in the cerrado biome (Lorenzi, 1992). This species has great potential for exploitation due to both the possibility of harmonious coexistence of Baru plants with other anthropic activities, especially in areas where subsistence or family farming is developed, and as a consequence of its multiple uses. In Brazil, the most adopted method for implanting forest stands has been the use of seedlings produced in nurseries (Finger et al, 2003; Silva and Carvalho, 2008). Seedlings are formed under controlled conditions in this system during a period of time that varies with the species
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