Germinação e vigor de sementes de capim-buffel e capim-andropogon submetidas ao contato com superfosfato simples

Abstract

Mixing forage seeds with chemical fertilizer is a practice that can be used as a means to mechanize the planting process, in addition to the hypothesis of overcoming dormancy due to the effects of fertilizer on the seed coat. The objective was to study the germination and vigor of buffel grass seeds cv. Aridus (Cenchrus ciliares L.) and andropogon grass cv. Planaltin (Andropogon gayanus Kunth) mixed with simple superphosphate (SFS). Due to the distinct origin of the seeds of the two species of grasses, two independent experiments were carried out, in a completely randomized design, with five treatments, which consisted of five times of contact with the simple superphosphate (0, 24, 48, 72 and 96 hours ). There was no effect for the variables water content, germination speed index and seedling length of buffel grass. Germination, emergence speed index and electrical conductivity were favored by contact with the SFS. There was no effect for the water content, germination speed index, emergence and seedling length of andropogon grass. There was an increasing linear effect of seed contact with the SFS for germination, emergence speed index and electrical conductivity. The 96-hour mixing time of seeds of both species favors germination, and the approximate time of 48 hours of contact between buffel grass and andropogon grass seeds favors more vigorous seeds.