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리기테다 소나무 종자의 피복과 (被覆) 전처리에 의한 발아 (發芽) 및 유묘 (幼苗) 생장 촉진
고대식(D . S . Koh),허삼남(S . N . Hur),서병수(B . S . Seo) 한국산림과학회 1994 한국산림과학회지 Vol.83 No.4
Seeds of Rigitaeda pine tree (Pinus rigida × P. taeda) was primed with polyethylene glycol (PEG-6000) under different PEG concentrations, treatment period, and temperatures to test uniformity of germination. Coated seeds and PEG treated seeds were sown to compare germination, emergence, establishment, and seedling growth. The results obtained are summarized as follows : 1. As the concentration of PEG increased, as total germination percentage of pine tree was increased. Total germination percentage of pine tree seeds primed with PEG at 15 or 20℃ was better than the seeds treated at 10℃ compared to untreated seeds. 2. Germination rate was improved as primed period long and level of PEG concentration high. 3. Maximum germination rate was high with long PEG treatment period, and markedly improved when the seeds were primed at 20℃ 4. Priming with PEG at 20℃ for 12 days reduced time taken for germination. 5. Osmoconditioned seeds accelerated germination under drought condition with injurious effect of coated seeds by some chemicals. 6. There were much differences in establishment and dry matter production between drill and oversowing method, and primed seeds showed better performances than the coated seeds. Coating effects to seeds were better under drought soil condition rather than moderate moisture condition.