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| Author(s): |
Gustavo Cavalari Barboza
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Agrícola |
| Defense date: | 2016-08-31 |
| Examining board members: |
José Teixeira Filho;
André Luiz Lopes da Silveira;
Marcos Vinicius Folegatti;
Antonio Carlos Zuffo;
Jurandir Zullo Junior
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| Advisor: | José Teixeira Filho |
| Abstract | |
The Brazil presents as the main country, to deploy on a large scale, ethanol as an alternative fuel to the oil. However, several factors influence the crop production of sugarcane (soil, climate, management and variety). The purpose this work were to study the ecophysiological behavior of transpiration and stomatal conductance on the leaf-scale and transpiration in plant-scale to the sugarcane variety RB 867515 in response to environmental variables such as global radiation, photosynthetically active radiation, deficit atmospheric vapor pressure and the leaf water potential. For this, was installed a portion of sugarcane that were performed transpiration and conductance stomata measures in the leaves with the assistance of an automated analyzer photosynthesis (IRGA) and also sap flow sensors were installed, by the method heat balance, for the monitoring of transpiration in plant scale. Leaf water potential measurements were carried out for the monitoring of water availability in the soil. In each scale, were described and quantified the main mechanisms of water flows in culture. The results showed that the transpiration and stomatal conductance, in leaf-scale leaf like at plant- scale, were related to weather conditions (global radiation, photosynthetically active radiation and deficit vapor pressure) and the conditions of leaf water potential. During the experimental phase, there was an extreme weather event, which caused the plants of stalk lodging, resulting in lower rates of gas exchange, due to the lower incidence of solar radiation on plants in this condition and thus resulted in a decrease in total transpiration the orchard, in which the effects of environmental factors on the leaves vary according to their position in the canopy. The information generated will enable the development of better managements and cultivars, thus exploit the place of production and promoting better crop yield, aiming at efficient use of water (AU) | |
| FAPESP's process: | 12/05549-8 - SAP FLOW AND RELATIONSHIP WATER LEAF OF SUGARCANE(Saccharum officinarum L.) PROPOSING SCALING UP |
| Grantee: | Gustavo Cavalari Barboza |
| Support Opportunities: | Scholarships in Brazil - Doctorate |