Study of the Photosynthetic Ability of Perennial Legume Species in the Floristic Structure of Permanent High-Altitude Pastures
Keywords:
altitude, chlorophyll, fertilization, pasture, perennial legumes, soluble sugarsAbstract
To point out the photosynthetic ability of perennial legume species, we measured the following parameters: chlorophyll content and soluble sugar content. Sampling was done on permanent pastures at different altitude levels: 90 m, 330 m, 900 m, and 1,800 m. Soluble sugar content was measured in samples from variants fertilized with mineral nitrogen and with organic fertilizers (through animal folding). Results showed that, as far as chlorophyll content is concerned, there is a negative relation between this parameter and the altitude level of the pasture. Perennial legume species on the pastures had a lower content of soluble sugars in all the variants fertilized with mineral fertilizers and with organic fertilizers compared to the control variant.
References
Bethlenfalvay, J. G., Philips, A. D., Ontogenetic interactions between photosynthessis and symbiotic nitrogen fixation in legumes, Plant Physiol., 1977, 60, 419 – 421.
Heerden Van, P. D. R., Beer De, M., Mellet, J. D., Maphike, S. H., Foit W., Growth media effects on shoot physiology, nodule numbers and symbiotic nitrogen fixation in soyben, South African Journal of Botany, 2007, 73, 600 – 605.
Kouas, S., Slatni, T., Salah, B. I., Abdelly, C., Eco – physiological responses and symbiotic nitrogen fixation capacity of salt exposed Hedysarum carnosum plants, African Journal of Biotechnology, 2010, 9 (44), 7462 – 7469.
Norouzi, H. A., Afshari, H., Biary, E. S. and Ebadi, G. A., – Physiological response of wheat cultivars to nitrogen sources, J. Food Agric. Env., 2011, 9 (3,4), 455 – 458.
Reeves, D. W., Mask, P. L., Wood, C. W. and Delaney, D. P., Determination of wheat nitrogen status whit a hand – held chlorophyll meter: influence of management practices, Journal of Plant Nutrition, 1993, 16, 781 – 796.
