EFFECTS OF PELETIZING ON THE GERMINATION AND DEVELOPMENT
PAULO CÉSAR MAGALHÂES, DAYSE M.N. FERREIRA, CARLOS ALBERTO VASCONCELOS, JOÃO T. AZEVEDO E CLEVERSON S. BORBA
The sorghum crop when seeded right after soybeans requires speed during seeding in order to take advantage of the rainyseason period. Planting by airplane let the sorghum be seeded before soybean harvesting, improving the use of the rainy season and increasing the productivity. Increasing the seed weight by pelletizing and the presence of nutrients dose to the seedlings should increase the efficiency of airplane planting and favours the development of sorghum seedlings. In order to evaluate the sorghum seed pelletizing with different fertilizers, it were installed three experiments with four replications and the following treatments: three sorghum cultivars, ?Savana 5?, ?BR 601? and ?BR 304?; four pellets: ?FTE, ?KCl+SS?, ?lime? ?Yoorin? (thermophosfate) and a control. After pelletizing the sorghum seeds were put to germinate in laboratory on Petri dishes, in greenhouse by using wood boxes and in the field. The parameters evaluated were: germination percentage, speed of germination and seedling dry weight. In lab ?Yoorin? was the best pellet, whereas in greenhouse only seed germination percentage was altered by the pellets, being the treatments KCI + SS, FTE and lime better than Yoorin and control respectively. In the field there were not signifïcative differences among the treatments. It may be concluded that in general the pelletizing increased the quality and vigour of sorghum seeds.
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