INFLUENCE OF PHOTOPERIOD AND SOLAR RADIATION ON THE DATE OF FLOWERING OF SUGAR CANE IN CENTRAL REGION OF CUBA

Abstract

The objective of the present work was to define the influence that you produce the photo period and the solar radiation on the date of flowering of the sugar cane with intentions of his use in the genetic improvement of the cultivation at the central region of Cuba. The ones that drank at three located zones around the parallel 22, in different altitudes of the Central of Cuba used 80 varieties themselves for it ( Guayos, Buenos Aires and Mayarí ) and they determined the date to them or days to start of flowering during 14 years ( 1996 to 2009 ) and they associated with data of the climate ( Insolation ) and astronomic data (hour of sunrice and sunset). As a result you met than the period of floral induction produces between the 4 and September 29 itself at the survey area ( 26 effective days ) and than in this time the day matches decreasing on average 1.15 daily minutes, differences in the fotoperíodo for the survey area did not find themselves, but if in the insolation between the altitudes and studied years, favoring minor insolations in the inductive period to 100 and 400m of altitude and loud moral values in the period after inductive to 800m. They define periods at work so that you pass the flower to his final exit.