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| Author(s): |
Alexandrius de Moraes Barbosa
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Botucatu. 2017-04-17. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agronômicas. Botucatu |
| Defense date: | 2017-02-17 |
| Advisor: | Marcelo de Almeida Silva; Gustavo Maia Souza |
| Abstract | |
World energy production needs to increase by at least 50% until 2050, to meet population growth and economic development. One of the strategies will be to increase the conversion efficiency of solar energy to phyto energy, however, it is still necessary to know the real efficiency of this process in the field and how the production environment can influence it, especially in sugarcane, which is the main raw material in Brazil. In this sense, the objective of this work was to evaluate the effect of production environment on efficiency of the conversion of solar energy to phyto-energy in three cultivars of sugarcane. It was used a design of complete block randomized in the 2x3 factorial scheme, with two production environments (A and C) and three sugarcane cultivars (SP80-3280, RB855156 and RB867515). Two cultivation cycles (cane-plant, from March 2014 to May 2015, cane-ratoon, from May 2015 to June 2016) were evaluated. At 150, 285 and 415 days after planting (DAP) and 150, 180 and 380 days after harvest (DAH) the biomass productivity (DMAP) the radiation use efficiency (RUE) and efficiency of the conversion of solar energy to phyto-energy (EC). The stalks production in cane-plant and cane-ratoon was 30,2 and 28,9% higher in production environment A, while DMAP yield was 11,2 and 21,9% in cane-plant and cane-ratton in production environments A and C, respectively. Although the production environment A received 5,2 and 5,8% less solar radiation than the production environment C in cane-plant and cane-ratoon, it was observed that the RUE and EC was higher in all cultivars in the production environment A in both crop cycles. The average EC of the cultivars was 3.84 and 2.93% in cana-plant and 3,42 and 2,24% in cane-ratoon in productions environments A and C, respectively. The EC was higher in the production environment A due to higher fraction of diffuse solar radiation, higher water availability and soil fertility. (AU) | |
| FAPESP's process: | 13/13031-1 - Effect of the production environment and genetics in the conversion efficiency of solar energy in phyto-energy in sugarcane |
| Grantee: | Alexandrius de Moraes Barbosa |
| Support Opportunities: | Scholarships in Brazil - Doctorate |