DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/2020 str. 35 <-- 35 --> PDF |
Greenhouse Experiments – Istraživanja u stakleniku The seeds collected at three different times were sown (15.01.2009) in the greenhouse after they had been subjected to soaking in water for 48 hours, stratification for 8 week and GA3 treatments (100 and 400 ppm). The air temperature in the greenhouse was at +4 0C in the morning, +7 0C at noon and +9 0C in the evening at the begining of first germination (26.01.2009). The average temperature in the greenhouse was at +11 0C in the morning, at +15 0C at noon and at +19 0C in the evening until the last date of germination. Germinants were counted at weekly. The difference between the treatments was tested by analyses of variance and the significance of differences between groups was tested by Duncan’s test (Table 4 and Table 5). There was no effect of seed collection time on germination in the greenhouse. The effect of stratification was significant on germination (p<0.05) (Table 4). While the avarage germination percentage of seeds sown after eight weeks of stratification period was 53,55 %, the germination percentage of seeds sown unstratified was 38,72 % (Table 5).GA3 treatment had a significant effect on germination but this effect was negative. There was a significant interaction between seed collection time and stratification (Table 4). The highest germination was obtained in seeds collected at third collection time (october 10) and sown after 8 week cold stratification (60,16 %). Also, according to the results of the correlation analysis, there was a positive correlation between seed collection time and germination (r=0.59). Germination percentages were also evaluated in terms of treatments (Figure 2). The highest germination percentage in the greenhouse was observed in seeds collected at third seed collection |