Ordem das umbelas e qualidade de sementes de cenoura (Daucus carota L.)

Abstract

This work was developed with the culture of the carrot in areas of seated tree producers, two of which with production organics and one with production conventional, with the main objective to evaluate the quality of the seeds of umbels of 1ª.and 2ª order, for produced them. These areas had been implanted during the second fortnight of May and the first harvested fortnight of June of 2004 and during the second fortnight of December of the 2004 and first fortnight of January of 2005. In each area of production they had been demarcated three parcels to perhaps, contend 10 plants each one. Umbels first-class had been harvested and evaluated separately in weight of seeds for umbels and weight of a thousand seeds. Umbels of second order they had been harvested separate by plant determining itself number and excessively evaluation, as weight of seeds for umbels (average), weight of a thousand seeds and all up weight of seeds. Evaluations of the physiological quality indicates differences of vigor first enters the seeds of umbels and second not heaven linearity with the results of germinates, being distinguished only differences between producers. The weight of a thousand seeds more discloses a tendency of the seeds produced for umbels first-class to be weighed than those deriving ones of umbels of second order. The weight of seeds for classroom in umbels of second orders that present 60% production of seeds. Considering the number of umbels for plant, the variation it was small not significant, having each plant produced in on average 5 umbels. Considering the great one it participates of umbels of second order, in the all up weight of production and considering the physiological quality of these seeds for being inferior the first-class is advisable a one new process of the same ones, objectifying acquisition of a bigger volume of seeds that takes care of models minimum of quality demanded for the norms that regulate it deal of seeds. For the system of production of seeds basics, must be given preference the seeds harvested in umbels first class, therefore the same ones produce seeds of better physiological quality. Evaluated had demonstrated that as much germinates it, how much the vigour and the weight of a thousand seeds of the seeds of umbels first order had presented better resulted that umbels of second order.