TAILIEUCHUNG - Báo cáo khoa học: "The influence of seed age on germinative response to the effects of fire in Pinus pinaster, Pinus radiata and Eucalyptus globulus"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: The influence of seed age on germinative response to the effects of fire in Pinus pinaster, Pinus radiata and Eucalyptus globulus. | Tree seed age and fire germination 443 . Average germination time Average germination times vary according to the species treatment and age studied figure 2 . P. pinaster has an average germination time which varies greatly according to the age of the seeds or the treatments applied. The differences found between different ages has a very high significance value p and these differences are due to the average germinationtime of the seeds from 1993 which are different from all the others. These seeds have the shortest average germination time with an average value of days. A second slower group of seeds from 1991 has an average of days. Seeds from 1990 have a rate of days and seeds from 1992 have a rate of days. The differences that exist between the seeds from 1991 and 1992 are also significant. Significant differences were also found between the different treatments p . The Control and Ash Temperature treatments being responsible for this. In P. radiata there were no significant differences between seeds of different ages although it did offer quite important differences between treatments p . In agreement with the Test of Tukey the Temperature treatment is significantly different from Ash and Ash Temperature. The Temperature treatment presents the shortest average germination time in seeds of all ages days on average followed by Control days Ash Temperature days and finally Ash days . For E. globulus there are no significant differences either between the treatments or between ages. The average germination time is approximately 15 days. The seeds from 1993 had the shortest average germination time with the longest corresponding to those from 1990 figure 2 although between them there is only a difference of two days. In none of the treatments are differences in average germination time greater than two days. . Temporal distribution of germination The temporal distribution of germination is .

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