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ŠUMARSKI LIST 11-12/2009 str. 31     <-- 31 -->        PDF

S.Andrašev, M. Bobinac, S. Orlović: DIAMETER STRUCTURE MODELS OF BLACK POPLAR SELECTED ... Šumarski list br. 11–12, CXXXIII (2009), 589-603


The clones were differentiated by mean diameter in the
fifth year after planting and it lasted to the end of the
study period of 20 years.


The clone differentiation per attained basal areas per
hectare (G), which indicates indirectly the differences in
volume per hectare, also, occurs in the fifth year and
lasts through the eighth year (Table 3, Diagram 1b). At


the age of 12, the values of basal area per hectare were


2 -1


very close for all six study clones (24.2–26.3 m·ha )


with F-ratio of the analysis of variance amounting to
only 0.53.With the increasing plantation age, the differences
between clones in basal areas per hectare incre ase
and at the age of 20, the differences were significant
at the risk level of 0.05.


2 -1


a)Stand quadratic mean diameter d(cm)
b)Basal area per hectare, G (m·ha)


g


Srednji promjer po temeljnici dg(cm)
Temeljnica po hektaru G (m2·ha-1)


Diagram 1 Mean values of the stand quadratic mean diameter (dg) and total basal area per hectare (G) of the clones depending on
plantation age.


Grafikon 1. Srednje vrijednosti prsnog promjera po temeljnici (dg) i ukupne temeljnice po hektaru (G) istraživanih klonova u zavisnosti
od starosti nasada


Table 3
Basal area per hectare (G) and the results of the analysis of variance test and LSD test at the risk level of 0.05
for the clones per years of measurement.


Tablica 3.Temeljnica po hektaru (G) ) i rezultati testa analize varijance i testa NZR na razini rizika od 0,05 istraživanih
klonova po godinama izmjere.


Clone
Klon
Plantation age after planting –Starost nasada nakon sadnje
1 year
1. god.
2 years
2. god.
5 years
5. god.
8 years
8. god.
12 years
12.god.
17 years
17. god.
20 years
20. god.
Gg [m2 ·ha-1]
S6-36 0.27(0.02)
1
bc
2
1.31 (0.11) a 9.10 (0.73) b 16.83(0.55) bc 24.34 (1.01) a 33.67(1.22)abc37.63 (1.42) bc
NS1.3 0.32 (0.03) ab 1.24 (0.11) a 10.47 (0.99) a 18.69(2.32) ab 24.19 (3.17) a 31.56(4.32) bc 36.13 (5.42) bc
NS11-8 0.24 (0.06) b 1.22 (0.17) a 9.35 (1.13) ab 18.12(1.65) ab 25.70 (2.40) a 35.10(2.90) ab 40.31 (2.92) ab
Pannonia 0.27 (0.01) bc 1.33 (0.12) a 7.62 (0.69) c 15.67 (0.80) c 24.32 (1.15) a 34.23(1.62)abc38.29 (2.42) bc
PE19/66 0.34 (0.06) a 1.48 (0.14) a 10.57 (0.12) a 19.12 (1.05) a 26.30 (1.64) a 37.09 (3.08) a 44.70 (4.36) a
S6-7 0.28 (0.01) ab 1.46 (0.05) a 10.34 (1.32) ab17.99 (1.77) ab 24.61 (3.74) a 30.14 (4.09) c 34.32 (4.11) c
F 2.15ns 1.85ns 5.54** 2.94* 0.53ns 2.59ns 3.85*


1


Values in parentheses represent the standard deviation –Vrijednosti u zagradi predstavljaju standardnu devijaciju.


2


The same letters indicate that there is no statistically significant differences between the clones tested by least significant


differences at the risk level of 0.05 – Ista slova znače da ne postoje statistički značajne razlike između klonova po testu


najmanje značajne razlike na razini rizika od 0,05.


ns*
**


non significant –nije signfikantno; significant at the risk level of 0,05 –signfikantno na razini rizika od 0,05; significant


***


at the risk level of 0,01 –signfikantno na razini rizika od 0,01; significant at the risk level of 0,001 –signfikantno na
razini rizika od 0,001.