Efeito de diferentes fotoperíodos na bulbificação de dois cultivares de alho (al lium sativum l.)

Abstract

This experiment was carried out with two garlic vari􀃬ties, Amarante and Centenário, under greenhouse condition􀀞 in arder to verify the effect of the photoperiod of 9, 12, 15 h,2 urs and natural, on the bulbing of that vegetable. Plants exposed to photoperiod of 12 and 15 hours,r􀀪 ceived 9 hours of sunlight followed by incandescent light {180 lux, aproximately). Results show that long-day treatments hasten the bulb forrnaticn with reduction of the culture cycle,in both varieties. The increase of day-length caused decrease of bulb weight at the time of harvesting, as result of the shortenint of the bulb's growth stage. The occurrence of bulbing in all treatments indic􀁎 ted that the critica! phoroperiod is lower than 9 hours, in both varieties.