Abstract: The yearly growth study (accumulated growth elongations, the number of leaves and tillers by plant as well as the output of dry matter) of three local Graminaceous fodder, has been achieved according to bioclimatic index of sum temperatures (E0). The obtained results showed that during the last growth phase, the rye-grass was characterized by a higher increase of both accumulated growth elongations of the initiated leaves and of dry matter production, compared to the tall fescue which has the weakest of such characters. With regard to the broadcast of new tillers, the rye-grass comes in the second position after the tall fescue which marked the most elevated growths. It should mentioned that the accumulated growth of the studied parameters is proportional to the sum temperature index (E0) and follows the same evolutionary manner at the three studied species, but the differences are of quantitative order.
M. Boudelaa , S. Slimani , A. Boutebba and S. Boussora , 2007. Growth Study of Three Local Populations of Graminaceous Fodder According to Bioclimatic Index of Sum Temperatures (E0). Agricultural Journal, 2: 93-96.