Study Regarding the Influence of the Versant on the Development of Spruce Seedlings

  • Liviu HOLONEC University of Agricultural Sciences and Veterinary Medicine, Cluj Napoca
  • Rodica HOLONEC University of Agricultural Sciences and Veterinary Medicine, Cluj Napoca
  • Horea VLASIN University of Agricultural Sciences and Veterinary Medicine, Cluj Napoca
  • Alexandru TODEA University of Agricultural Sciences and Veterinary Medicine, Cluj Napoca

Abstract

The development of seedlings was monitored depending on their position on the slope, from p.u. 48B from the P.U. IV Bondureasa. Six markets were placed, two downstream, two in the middle and two in the upstream of the slope, making observations on a total of 48 seedlings. Since it was a mixed spruce regeneration, measurements were made on 24 seedlings derived from natural regeneration and 24 seedlings placed artificially, by plantations. Seedlings were thus chosen to be representative and to be located in close proximity so as to enable comparing the height and diameter growths. Measurements were made during 2007-2009 and concerned the total height (in cm with 1 cm accuracy) and diameter at the collar of seedlings (in mm with 0.1 mm accuracy). The data were tabulated and differentiated for the two types of regeneration (artificial and natural). Analyzing the data presented, one can see that in the markets placed downstream of the slope (1 and 2), seedlings growths in height are higher (an average of 106.12 cm compared to 94.87 cm in the middle of the slope and 88.75 cm at the top). The same applies in the case of diameters at the collar (an average of 21.33 mm downstream, compared to 15.36 mm in the middle of the slope and 14.66 mm upstream).
Published
2010-02-20