Research On The Growth And Development Of Forest Plantations Installed On The Tailing Dumps From Moldova Noua

Realized with the aim of stabilizing the tailing dumps against wind erosion, the plantations performed along the embankments of the tailing dump Bosneag and Danube Valley from Moldova Noua, fulfill today, successfully, their ecoprotective role, forming a green oasis which bordered and conquer the "dessert" of sandy sterile, resulted from copper ore preparation.The research underlying this article, was focused on determination of biometric trees characteristics on 12 sample areas of 100 square meters each, constitute in 4 variants with 3 repetitions on each, depending on their position in relation with the two dumps, Bosneag and Danube Valley and depending on the position on the slope or on the plateau of the tailing dumps.Using "t" student statistical test, were determined the differences between biometrical characteristics, height and average diameter from the horizontal and vertical structure of forest plantations, from the tailing dumps in established variants and also was determined the significance level of these differences.Differences between biometric characteristics of trees from the variants are due to different stationary conditions between plateau and slope of the two dumps, due to different ages of stands and to different proportions of species. For black locust, the biggest differences were found between the slope of Bosneag tailing dump, where the black locust has a lower proportion, and the plateau of Danube Valley where it is predominant in landscape and where relatively high proportion of oleaster stimulated his height growth. In oleaster case, the differences very significant are between plateau areas of Danube Valley tailing dump where oleaster stimulate the growth of black locust, and the slope areas of the same tailing dump, where the oleaster is the main species, reaching in many cases in the upper ceiling of the stand and reaching at maximum diameters, in these plantations.