DIGITALNA ARHIVA UMARSKOG LISTA
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|UMARSKI LIST 1-2/2015 str. 54 <-- 54 --> PDF|
from Western Romanian Carpathians (32-Câmpeni= 0.282 m3 and 28-Turda= 0.272 m3); the local population in Gurghiu trial and respectively the nearest from testing site in Brețcu trial were ranked in the first third.
In the cumulative ranking of all the four trials, five populations of the top 10 were from the Eastern and four from the Western Carpathians.
Radial increments (RI) Radijalni prirasti (RP)
The highest RI average value was registered in Brețcu trial, INR (4.104 mm/year), and the lowest in the Câmpina trial, ONR (3.713 mm/year). The average of the two ONR experiments (3.883 mm/year) was 4.1% lower than those of INR trials (4.042 mm/year), even if the average result in Avrig was almost identical to that from the INR trials. ANOVA and Duncan tests (Table 3 and Figure 2) have revealed non-significant influences of population in both ONR trials, but significant for INR.
Cumulating the values of the two INR tests, the first position in the ranking was occupied by population 4-Marginea (4.405 mm/year), followed by 28-Turda and 12-Gurghiu.Among the most valuable 10 populations, five originated from Eastern Carpathians and three from Western Carpathians. The local population ranked 2nd in Gurghiu trial, after population 28-Turda (Figure 2).
Relating to performance of population 5-Moldovița, which was considered as standard by IUFRO, it was ranked 1st in Avrig and 12th in Gurghiu trial, but only in the second part of the ranking in the two other trials.
In terms of RI values registered in all four trials, among the top ten populations, eight originate from Eastern and Western Carpathians (four from each branch). For the cumulative values in all four trials, the average RI is higher for populations originate from Eastern Carpathians, while the populations originate from Southern Carpathians achieved small but more stable values.
Latewood percentage (LP) Postotak kasnog drva (PKD)
The lowest LP values were recorded in Câmpina (20.3%) and the highest (37.9%) in Brețcu trials (Table 2), which corresponds to the lowest and the highest altitude, respectively. For all four experiments, a direct but not significant simple Pearson correlation between LP and site altitude (r = 0.84) resulted. On average, ONR, the latewood represents 22.3% of RI, whereas INR the average was 31.9%. Analysis of variance (Table 3) revealed a higher level of variation in populations grown in their natural habitat or in satisfactory environmental conditions in Avrig trial, ONR. Low level of variation resulted in the difficult environmental conditions of the Câmpina trial, probably as a result of the selective pressure of the environment.
ONR, among the top ten-ranked populations in terms of LP value, five originate from Eastern Carpathians and three from Curvature Carpathians (ecological region B in figure 1, located at the southern end of the Eastern Carpathians), and the closest to the both trial sites were ranked in the second quarter (Figure 3). INR, in the ranking of first ten populations was registered an increased proportion of those originating from the Eastern Carpathians (about 70%).
For the IUFRO standard provenance (5-Moldovița), higher values of LP than the average of all populations were registered both INR (17.3% more than the mean of all populations)