Abstract
ABSTRACT Brazil is the largest producer and exporter of sugarcane in the world, and the sugar and ethanol sector has invested in the development of new technologies and methods of planting to meet the market demand. Thus, the aim of this study was to evaluate the performance of sugarcane at the acclimation phase and under field conditions, from pre-sprouted seedlings exposed to supplementary lighting, through light-emitting diode, in the period of acclimation in a greenhouse. The experiment was carried out in Carpina, PE, Brazil, from January to September 2017. The experimental plots were composed of pre-sprouted seedlings acclimated in greenhouse, exposed to the supplementary lighting systems, 90% Red + 10% Blue (R:B 90/10), 80% Red + 20% Blue (R:B 80/20), 70% Red + 30% Blue (R:B 70/30) and a control. The evaluation of seedling growth was performed through the measurement of biometric indicators: plant height (cm); stem length (cm); stem diameter (cm) and number of tillers. The biometric indicators showed no significant differences, but plants under lighting systems with a greater proportion of the red wavelength (R:B 80/20 and R:B 90/10) showed higher percentage of survival in the field.
Highlights
The increase in demand and reduction in sugar stock in the global market should sustain the production of sugarcane for the decade, which will continue to be the main crop used for sugar manufacturing, especially in developing countries of Africa, Asia and South America.In order to meet this growing demand, in search of higher yield, the sugar-energy sector has invested in the development of new technologies and methods of planting.According to Gazola et al (2017), for the sugar-energy sector to continue to advance in a sustainable manner, new seedling production techniques should be studied to make the process faster
In view of the above, the objective of this study was to evaluate sugarcane performance in the final phase of acclimation and in the field, grown from pre-sprouted seedlings exposed to supplementary lighting with light-emitting diode (LED) in the acclimation period in a protected environment
In regard to the biometric variables plant height and stem length, higher mean values were observed in the R:B 80/20 system, equal to 48.68 and 12.59 cm, respectively, being significantly higher compared to R:B 90/10
Summary
In order to meet this growing demand, in search of higher yield, the sugar-energy sector has invested in the development of new technologies and methods of planting. According to Gazola et al (2017), for the sugar-energy sector to continue to advance in a sustainable manner, new seedling production techniques should be studied to make the process faster. Throughout the growth period, the seedlings underwent the acclimation phase, in which environmental variables can be managed to obtain more resistant and vigorous seedlings. Among these variables, solar radiation has a direct influence on seedling development
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