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頁籤選單縮合
題名 | Seed Longevity of Miscanthus Species=芒草種子壽命之研究 |
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作者姓名(中文) | 許福星; | 書刊名 | 畜產研究 |
卷期 | 33:2 2000.06[民89.06] |
頁次 | 頁145-153 |
分類號 | 437.115 |
關鍵詞 | 芒草; 發芽; 衰化; 種子壽命; Miscathus; Germination; Aging; Seed longevity; |
語文 | 英文(English) |
中文摘要 | 本試驗目的乃在探討芒草(Miscanthus spp.)種子壽命與貯存期限之關係,將採自臺東及南投海拔1,600公尺之五節芒(M. floridulus)與採自海拔2,600公尺之高出芒(M. transmorrisonensis)種子分別貯存於室溫及冷藏櫃(4℃及相對濕度50%)0、3、6、12、18及24個月後,置於發箱25℃中發芽,結果得悉貯存在室溫下的種子,其發芽力於貯存6個月後即急速減少,貯存12個月以上種子即無法發芽,而貯存在冷藏櫃中者,其發芽力則未受貯存期限的影響,高山芒反而於冷藏櫃貯存24個月後,仍保有最高的發芽力。亡草種子在乾燥情況下於40℃經過衰化處理96小時後,對其種子發芽力沒有很大的影響。但在潤溼情況及40℃下,經過衰化處理24小時後,其種子發芽力即顯著的降低,在衰化處理48小時後,其發芽力幾乎停止;高山芒比五節芒種子較能忍受衰化處理。依此推斷芒草種子於冬天成熟後被風吹落於土中,若未能於第二年的春天發芽生長,於6個月後,將會失去其發芽能力。 |
英文摘要 | The objectives of this experiment were to determine the relationship between seed longevity and storing period for Miscanthus spp. Seeds of M. floridulus were harvested from Taitung county and mountainous areas at 1600 m in elevation in Nantou county and those of M. transmorrisonensis from mountainous areas at 2600 m in elevation in Nantou county, respectively. Before germination test, the seeds were stored in ambient condition and in a refrigerator at 4℃ for 0, 3, 6, 12, 18 and 24 months, respectively. Germination tests were conducted in an incubator at 25℃. The germination ability of the seeds stored in ambient condition for 6 months was reduced drastically. No germination was observed after storing in ambient condition for periods of 12 months or more. The germination ability of those seeds stored in a refrigerator for up to 24 months was not affected. Seeds of M. transmorrisonensis showed the highest germination ability stored in a refrigerator for 14 months. No effect was observed on germination ability of the seeds after aging in a dry state at 40℃ for 96 hours. However, significant decrease in germination ability was observed after aging in a moistened state at 40℃ for 24 hours, and germination was almost stopped after aging under this condition for 48 hours. Seeds of M. transmorrisonensis were more tolerant to aging treatment than those of M. floridulus. It was concluded that Miscanthus seeds might lose their germination ability 6 months after being dispersed by the wind under natural conditions. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。