RESEARCH ON THE GROWTH AND DEVELOPMENT OF FOREST PLANTATIONS INSTALLED ON THE TAILING DUMPS FROM MOLDOVA NOUA

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-37-7 / ISSN 1314-2704, June 18-24, 2015, Book3 Vol. 2, 513-520 pp

ABSTRACT
Realized with the aim of stabilizing the tailing dumps against wind erosion, the plantations performed along the embankments of the tailing dump Boşneag 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, Boşneag 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 Boşneag 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.

Keywords: black locust, oleaster, tailing dumps, biometric characteristics, “t” student test