DIGITALNA ARHIVA ŠUMARSKOG LISTA
prilagođeno pretraživanje po punom tekstu



ŠUMARSKI LIST 1-2/1971 str. 27     <-- 27 -->        PDF

— ovo su tek prvi rezultati. To nam ne daje pravo da donosimo konačne
zaključke o ovoj problematici. U cilju provjeravanja ovih podataka i mogućnosti
primjene novih zahvata, nastavit će se s praćenjem ovog pokusa i u
budućnosti.


LITERATURA


1.
Hawle y R., Smit h D.: The Praticte of Silviculture, 1958.
2.
Kö stie r J.: Waldbau, Berlin 1955.
3.
Mayer — Wagelin: Astung, Hanover, 1936.
4.
Pearso n G. A.: Management of ponderosa pine in the southwest, Agriculture
Monograph No. 6, Washington, 1950.
5.
Pi n ta r id K.: Rezanje grana kao mjera za povećanje vrednije drvne mase,
Narodni šumar 5—6/1964.
6.
Radimi r D.: Uzgojna mjera kojoj se u nas ne poklanja dovoljna pažnja,
Šumarski List 10—11/1952.
7.
Scot t C. W.: Pinus radiata, FAO, Rome, 1960.
8.
Stie l W. M.: Stem growth reaction in young pine to the removal of branch
whorles, (Separat) 1969.
9.
Woo d R. F.: Some influence on practice in the espacement, mining and
pruning of coniferous plantations, (Separat), 1962.
10.
U gr enovi ć A.: Istraživanja o granatosti (kvrgavosti) bora (Pinus L.), Anali
eksperimentalnog Instituta za šumarstvo, Vol. I, 1955.
11.
Silvics of Forest Trees of the United States, Agriculture Handbook No. 271, 1965.
12.
Webe r R.: Early Pruning Reduces Blister Rust Mortality in Withe Pine
Plantations, (Separat), 1964.
13.
Fun k D. T.: Pruning Withe Pine, A Literature Rewiew, (Separat), 1961.
14.
Veliki Šumarski priručnik I, Zagreb, 1946.
BRANCH PRUNING AS A TENDING OPERATION IN INTENSIVE CULTURES
OF SCOTS PINE (PINUS SILVESTRIS L.)


Summary


In an intensive culture of Scots Pine (Pinus sylvestris) established in the
spring of 1962 in the area of the Forest District of Gospić, locality »Mušaluk,
there was laid out an experiment of pruning lower branches.


The experiment was laid out in the spring of 1966, when the culture was
4 years old, an at the beginning of crown closure formation. Applied were two
different intensities of pruning: a stronger one (B), and a weaker one (A). On
the plots of the stronger pruning intensity 30n/o of the living crown length was
pruned, and on the plots of the weaker intensity 205/o of the living crown length.


According to the results of the first (autumn 1966) and second (autumn 1969)
measurements, there were no statistically justified differences in height and
diameter increments of stems between the control plot and those with the
stronger or weaker pruning intensities under the probability of 5´7». On this
basis a conclusion can be drawn that in intensive cultures of Scots Pine — at
the time of commencement of crown closure formation — we may prune up to
SO"/« length of the living crown above the ground surface without diminishing
the height and diameter increments of stems. This conclusion will be verified
through further folow-up of the development of trees in the mentioned experiment.