ABSTRACT
This work was aimed at quantifyingthe height growth of Pinus elliottii Engelm in the region of Canela - RS, comparing the growth of trees originated from natural regeneration end plants produced from artificial regeneration, and describing the height growth of the species according to the origin of the plants by means of mathematical functions. The work was accomplished at Agropecuária Fazenda do Ipê, situated in Canela, RS, between the coordinates 29° 18’, southern latitude and 50° 53’ western longitude, where dominates a Cfb1-type climate. The height and age data pairs were obtained through the complete trunk analysis, being the sample-trees of each treatment taken between the average and the ± pattern deviation. 10 trees for the plastic bag recipient treatment, 9 for the natural regeneration one, and 11 for the bare rooted one were sampled. Throughout statistical analysis, it could be concluded that a second-degree polynomial described with more precision the growth of 5-year-old trees, originated from plants produced in plastic bag recipient, bare root and natural regeneration. The comparison among the treatments, made by covariance analysis, showed that the natural regeneration has a greater initial growth. It was 21.85% greater than that one of trees originated by plants produced in plastic bag recipient and 45.62 % greater than that one bare rooted.
Key words:
Growth; height; Pinus elliottii; regeneration