DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 4-6/1975 str. 54 <-- 54 --> PDF |
Recording of data was performed at the end of the growing seasons 1970, 1971, 1972 and 1973. Recorded were the survival Ca/o) and height increment (L), and at the end of 1973 in addition the total height (h), diameter b.h. (d), and shoot diameter in 1973 (r). The shoot volume was calculated according to formula v=r-l. Performed were analysis of variance, F-test and Duncan´s multiple range test on an individual basis for all characteristics. Done was also the correlations analysis. In the 4th year after planting there were no significant differences in the plant survival among the variants. It was on an average on the plots of height class II and commercial class 94"/», height class I 93°/o and height class III 91´%. Height increment of plants during the follw-up period was on an average most intensive in plants of height class I, afterwards in height class II, then in commercial class and the poorest in heiht class III. The differences found were very significant in the 1st, 2nd and 3rd years after planting. In the 4th year there was no significant difference. Almost the same result was obtained also by may of testing differences for the volume of the terminal shoot. On the basis of the results obtained it was found that the differences in the height increment were most marked in the 1st year after planting already. Total height and diameter b.h. of plants in the experiment followed the initial relations between the height classes of plants. The established differences were highly significant. Duncan´s multiple range test demonstrated a superiority of the plants of height classes I and II in relation to the commercial class and height class III. The differences were more marked in respect of the diameter b.h. than of the total height of plants. On the basis of the data collected it is to be concluded that Scots Pine plants of height class III and those of the commercial height class were inferior in every respect to height classes I and II. On this basis is given a recommendation for the sorting of Scots Pine transplants into the height classes prior to their transporting in the terrain. Larger and higher-grade transponts will overgrow quickly the endangered zone where competition of weeds, autochtonous species and game is very keen. This contributes largely to a greater economy of works in the establishment and tending of forest cultures as a whole. INŽENJERI I TEHNIČARI! STRUČNJACI ŠUMARSTVA I DRVNE INDUSTRIJE! Pozivamo Vas na suradnju: OBJAVLJUJTE REZULTATE SVOJEGA RADA! Poželjno je obrađivati izvorne aktualne stručne teme (uspjehe i propuste) iz brojnih područja i oblasti šumarstva i drvne industrije u sažeto m obliku, sa nekoliko karakterističnih snimaka, crteža, grafikona, tabela i si. Objavljujte rezultate svojih Šumskih gospodarstava, svojih šumarija! Uredništvo Šumarskog Lista Zagreb - Mažuranićev trg 11 |