Emergence flow Ipomoea nil, (L.) Roth., Ipomoea quamoclit (L.), Merremia cissoides (Lam.) Hall, f.

Abstract

: Objective of this experiment was to evaluate the effect of the depth of the seeds in the profile of the ground and the presence of the straw in the regularity and intensity of emergency, as well as the dormancy and survival of seeds of Ipomoea quamoclit, Ipomoea nil and Merremia cissoides. The research was installed in embedded ceramics pipes in the ground. The adopted delineation was complete randomized, in the factorial project 3x3x2, with three repetitions: 3 species, 3 depths, 2 coverings. After one year of buried, the ground was removed and the recouped seeds had been submitted to the test of germination, and viability for the tetrazolio test. For Merremia cissoides, the percentage of plant emerged and recouped seeds was bigger in the depth of 0 - 5 cm. Had a lesser percentage of lost seeds in the depth of 0 - 5 cm, being that it did not have influence of the covering deceased., Ipomoea quamoclit, the emerged percentage of plant was bigger in the depth of 0 - 5 cm, with or without covering deceased, whereas the percentage of recouped seeds was lesser in the depth of 10 - 15 cm with or without covering presence deceased. The depth of 10 - 15 cm presented greater percentage of lost seeds, with or without covering deceased, Ipomoea nil, the biggest emerged percentage of plants was in the depth of 0 - 5 straw cm, with or without, being that the biggest percentage of recouped seeds was found in the same depth in the straw presence. The depth of 10 - 15 cm with covering presence deceased presented greater percentage of lost seeds.