Evaluation of the Use of Carbon Isotope Discrimination as a Selection Tool of Perennial Fodder Species for Temporary Pastures

  • Nicusor Flavius SIMA University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Manstur Str., 400372
  • Rodica Maria SIMA University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Manstur Str., 400372
  • Stela CUNA University of Agricultural Sciences and Veterinary Medicine, 3-5 M?n??tur Street, 400372, Cluj-Napoca
  • Gabriela CRISTEA University of Agricultural Sciences and Veterinary Medicine, 3-5 M?n??tur Street, 400372, Cluj-Napoca
  • Valentin MIHAI University of Agricultural Sciences and Veterinary Medicine, 3-5 M?n??tur Street, 400372, Cluj-Napoca

Abstract

Estimation of the relationship between carbon isotope discrimination (Δ13C) in perennial fodder plants and various factors such as climate, fertilization and soil could contribute to a better selection and/or improvement of genotype of fodder species. Theoretical models of carbon isotope discrimination in plants indicate a linear relationship between Δ13C and CO2 partial pressures ratio (pi/pa) from the intercellular spaces (pi) of CO2 in leaves and from the atmosphere (pa). It is also known that between pi parameter and water-use efficiency (WUE) there is a negative correlation. Eight perennial fodder legume and grass mixtures were cultivated on three levels of fertilization in order to assess mixtures for pastures that can provide sustainable quantitative and qualitative yields. The species, which composed the mixtures, were also cultivated as pure crops on the same fertilization conditions. The results of this study indicated that in five of the six species, which composed the mixture with the highest yield, pi/pa values decreased while fertilization doses increased, most likely as a result of variation in water-use efficiency.

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Author Biographies

Nicusor Flavius SIMA, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Manstur Str., 400372
Animal husbandry and Biotechnology, Forage production, Senior lecturer
Rodica Maria SIMA, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, 3-5 Manstur Str., 400372
Faculty of Horticulture, Vegetable growing Department, Senior lecturer
Stela CUNA, University of Agricultural Sciences and Veterinary Medicine, 3-5 M?n??tur Street, 400372, Cluj-Napoca
Mass Spectrometry Department, Sen. Res. Scientist I
Gabriela CRISTEA, University of Agricultural Sciences and Veterinary Medicine, 3-5 M?n??tur Street, 400372, Cluj-Napoca
Mass Spectrometry Department, Sen. Res. Scientist III
Valentin MIHAI, University of Agricultural Sciences and Veterinary Medicine, 3-5 M?n??tur Street, 400372, Cluj-Napoca
Economics, lecturer
Published
2011-11-21
How to Cite
SIMA, N. F., SIMA, R. M., CUNA, S., CRISTEA, G., & MIHAI, V. (2011). Evaluation of the Use of Carbon Isotope Discrimination as a Selection Tool of Perennial Fodder Species for Temporary Pastures. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 39(2), 34-41. https://doi.org/10.15835/nbha3926379
Section
Research Articles