Published in Scientific Papers. Series A. Agonomy., Vol. LVI
Written by Daniela TRIFAN, Marcel BULARDA, Ioan VIŞINESCU
There are a number of technical restrictions for achieving higher production of sunflowers, including: providingtemperature and water regime in critical phases of vegetation, against competition created by weeds and pests ordiseases control. The experience described in this paper is to reveal the comparative results between conventional andmodern Clearfield technology for three consecutive years, in pedoclimatical conditions of Braila Plain.The biological material used in this research was four Limagrain hybrids including two used in conventional cultureand other two hybrids improved genetic resistance for Pulsar herbicide, to use the Clearfield technology.Determinations made during the vegetation period about spectrum and density of weeds, and weeds control efficiencyby two chemical methods. The results were statistically interpreted by analysis of variance, with average of hybrids likecontrol. Economic efficiency was calculated for this two culture technologies, also.Of the four hybrids studied, the highest production was obtained hybrid LG 56.63 CL achieving very significant positivedifferences to average of hybrids analyzed. The lowest production were obtained of LG 56.55 hybrid grown inconventional culture system in all three experimental years, with very significant negative differences to control. LG56.63 CL hybrid has superior quality seeds of all other hybrids studied, with values of hectoliter weight rangingbetween 48 and 49.8 kg/h, while a thousand grain weight values ranged from 60 to 65.8 g.
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conventional technology
