Dynamics of vegetation is more and more affected by human activities. The more human society changes or the more and more systems are being built, the more important it is to understand how human activities affect succession. Human dominance of the systems covers a great variety of the management or control. The evolution and succession of the vegetation is developing permanently as a result of the development law and human impact, the development of the vegetation cover being analysed by the scientists from different countries. Through this work we are trying to do an appreciation on the effect of restriction of mowing and grazing on a permanent grassland of Poa pratensis L. The study was developed in the Surducului Hills that are placed at the base of the Poiana Rusca Mountains, at the east of the Bega river terraces. The observations were done on permanent grassland during five years (2006-2009). The vegetation was determined using the linear point-quadrate method, the results being calculated on the base of the botanical surveys. The geographical coordinates were determined with the help of a GPS receptor Magellan. The statistical method used was the correlation analysis. In conclusion we can say that the dynamics of the vegetation is in an intermediate evolution state created by the disturbances connected with the mowing and grazing; the underexploitation and the microclimate created by the presence of the Surduc Lake has determined the trend of the species from the point of view of the FS%; there is a negative correlation between VP and FS% of the legumes and between VP and FS% of the species belonging to other botanical families isn’t any correlation. Thus, our purpose is to continue this study for the applying and implementing of some restoration measures for the increase of the quantity and quality of the yield obtained on the surface of these permanent grasslands.

grasslands, pastoral value, specific volume

Presentation: oral