Growth, biomass and efficient use of nutrients in C3 and C4 forages species evaluated by MiniFACE

• Grant number: 12/20847-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: January 01, 2013
• End date: July 31, 2016
• Field of knowledge: Biological Sciences - Botany - Pant Physiology
• Principal Investigator: Carlos Henrique Britto de Assis Prado
• Grantee: Lívia Haik Guedes de Camargo Bortolin
• Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 08/58075-8 - Miniface climate-change impact experiment to analyze the effects of elevated CO2 and warming on photosynthesis, gene expression, biochemistry, growth, nutrient dynamics and yield of two contrasting tropical forage species, AP.PFPMCG.TEM

Abstract

Two forages will be studied under a control system miniFace under field conditions. The forages C3 Stylosanthes capitata and C4 Panicum maximum will be grown intercropped as in agricultural practice in an area of 2500 m2 on the campus of University of São Paulo at Ribeirão Preto city, Brasil. The system miniFace will provide high CO2 concentration and high temperature as treatments under field conditions according to the year 2050: 600 ppm of CO2 concentration and air temperature 2°C over the current air temperature. Sixteen areas in the form of rings with 2 m in diameter will be used to monitor the responses of C3 and C4 species during the annual period of growth. Several levels of plant organization will be monitored under field conditions in the control areas and in areas with high concentration of CO2, with high temperature and with high CO2 concentrationand high temperature. The final biomass, growth and nutrient use efficiency will be determined in two consecutive years. The high temperature and elevated CO2 concentration may affect positively the species C4 and C3, respectively. The treatmentunder high temperature condition and regular CO2 concentrations may impact negatively the C3 species by increasing respiration and photorespiration. However, the high concentration of CO2 may not have significant positive effect in the carbon balance of C4 species due to the presence of natural mechanisms of CO2 concentration in the leaves of this specie. These hypotheses based on the literature will be tested in the field and serve as a basis for a pasture management under future climate change. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BRITTO DE ASSIS PRADO, CARLOS HENRIQUE; GUEDES DE CAMARGO-BORTOLIN, LIVIA HAIK; CASTRO, ERIQUE; MARTINEZ, CARLOS ALBERTO. Leaf Dynamics of Panicum maximum under Future Climatic Changes. PLoS One, v. 11, n. 2, FEB 19 2016. (08/58075-8, 12/20847-5)

DE CAMARGO-BORTOLIN, L. H. G.; HABERMANN, E.; VICENTE, P.; BARBOZA, A.; GROPPO, M.; PRADO, C. H. B. A.; MARTINEZ, C. A.. Rising CO(2)in the field does not offset warming or drought constraints on leaf growth of a C(3)forage. EXPERIMENTAL AGRICULTURE, v. 56, n. 2, p. 265-279, APR 2020. (12/20847-5, 14/26821-3, 08/58075-8)