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Báo cáo khoa học: "developments in the redrying and storage of prechilled beechnuts (Fagus sylvatica L.): effect of seed moisture content and prechilling duration"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: developments in the redrying and storage of prechilled beechnuts (Fagus sylvatica L.): effect of seed moisture content and prechilling duration. | 49 Ann. For. Sci. 56 1999 49-57 Inra Elsevier Paris Original article Further developments in the redrying and storage of prechilled beechnuts Fagus sylvatica L. effect of seed moisture content and prechilling duration Claudine Mullera Elyane Laroppea Marc Bonnet-Masimbertb aInra Centre de Nancy 54280 Champenoux France b Inra Centre d Orleans 45160 Ardon France Received 11 February 1998 accepted July 1998 Abstract - Techniques for breaking dormancy of beechnuts Fagus sylvatica have been greatly improved over the last 20 years. A major improvement has been the introduction of a new procedure involving prechilling after rehydration of the seeds to a precise moisture content m.c. 28-30 . This allows long-term storage of non-dormant beechnuts. This study aimed to i optimize prechilling conditions by prechilling seeds at a range of moisture contents 28-34 for different durations X to X 6 where X is the duration necessary to obtain the germination of 10 of the viable seeds under stratification in a wet medium at 3 C ii follow changes in the germination ability of prechilled seeds during 3 years of storage. The germination capacity of beechnuts was tested just after prechilling after prechilling and drying down to 8 and after prechilling then drying and storage. The best maintenance of the germination percentage during storage was obtained when seeds were prechilled at 30 m.c. for X 2 weeks. A damaging effect of drying was observed when the moisture content of the seeds during prechilling was high 34 and the duration long X 6 . When prechilling was applied after storage the best results were obtained at 32 m.c. Inra Elsevier Paris. Fagus sylvatica beechnut seed I dormancy storage Resume - Progrès dans la conservation des faines Fagus sylvatica L. prétraitées influence de la teneur en eau des faines et de la durée de prétraitement. Les techniques de levée de dormance des faines Fagus sylvatica ont été grandement améliorées au cours des vingt dernières années. Un progrès .