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相關文獻
- Allelopathic Potential of Purple Nutsedge (Cyperus Rotundus L.) and Barnyardgrass (Echinochloa Crusgalli Beauv) on Corn(1)--Inhibition of Weed Extracts on Germination
- Allelopathic Potential of Purple Nutsedge (Cyperus rotundus L.) and Barnyardgrass [Echinochloa crus-galli (L.) Beauv.] on Corn (Zea mays L.).(3):Influence of pH and the Concentration of Extracts on Germination
- Allelopathic Potential of Purple Nutsedge (Cyperus rotundus L.) and Barnyardgrass (Echinochloa crusgalli (L-) Beauv.) on Corn (Zea Mays L. cv. Tainung No. 1)(2):Weed residue Effects on Corn Emergence and Seedling Growth
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- Temperature and Soil Moisture Content Affect the Germination of Purple Nutsedge (Cyperus Rotundus L.) and Barnyardgrass [Echinochloacrus-Galli(L.) Beauv.]
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頁籤選單縮合
題名 | Allelopathic Potential of Purple Nutsedge (Cyperus Rotundus L.) and Barnyardgrass (Echinochloa Crusgalli Beauv) on Corn(1)--Inhibition of Weed Extracts on Germination=香附子及稗草殘株對玉米之相剋效應(1)--雜草萃取液對玉米種子發芽之抑制現象 |
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作者 | 楊純明; | 書刊名 | 中華民國雜草學會會刊 |
卷期 | 12:2 1991.08[民80.08] |
頁次 | 頁12-21 |
分類號 | 434.147 |
關鍵詞 | 相剋作用; 香附子; 稗草; 雜草萃取液; 玉米; 發芽; 雜草殘株; |
語文 | 英文(English) |
中文摘要 | 本文旨在瞭解香附子(Cyperus rotundus L.)及稗草(Echinochloa crus-galli Beauv.)萃取液之相剋效應(allelopathic potential)對玉米(Zea mays L. cv. Tainung l)種子發芽之影響,並比較不同溫度所產生之效應。結果顯示,該兩種雜草萃取液對玉米種子發芽均具有抑制現象,而其影響程度端視萃取液製備方法而定。萃取液於30 ℃下經7天發酵後製備者(30 ℃╱7天),抑制表現最強,依序為30 ℃╱1天,2℃╱7天,及2℃╱1天者。萃取液若未經高溫高壓消毒(120 ℃,1.1 kg/cm�插A蒸氣消毒15分鐘),將引起真菌感染而進一步降低發芽率。處理溫度介於15 ℃至40 ℃之間時,提高溫度起初將促進玉米種子發芽直至27.5 ℃,超此溫度發芽率將下降。當溫度升至35 ℃以上時,發芽率則劇減。綜此結果,本試驗推測在田間環境下,香附子及稗草殘株的自然分解,可能產生抑制玉米發芽之毒害物質。此一現象在土壞溫度超過27.5 ℃時,將愈顯嚴重,而稗草較香附子具有強相剋效應表現。 |
英文摘要 | Aqueous extracts from field-grown mature plants of purple nutsedge and barnyardgrass were employed to study their allelopathic potential on corn (Zea mays L. cv. Tainung l) germination. Such effects in response to temperature gradient were also investigated. The results confirmed the existence of allelopathic potential on corn germination in both extracts at concentration of 1 g ground powder/10 ml double distilled water. It was shown that the methods of extract preparation had differential influences. Extracts prepared at 30 ℃ for 7 days (30 ℃/7 d) obtained the strongest inhibitive effect followed by those prepared at 30 C/1 d 2 ℃/7 d and 2 ℃/1 d. Fungal infection was observed in the extracts without sterilization, which caused the further inhibition of corn germination. In the range of 15 to 40 ℃, increasing temperature may first stimulate germination percentage, then reduce it after 27.5 ℃ with a dramatic reduction at 35 ℃. The reults proposed that certain unidentified substances from the breakdown of plant residues of purple nutsedge and barnyardgrass, both arise from the decay of residues and the interaction of decaying weeds with soil microbes, may affect seed germination of corn under natural conditions. Higher temperatures (above 27.5 ℃) will deteriorate such phenomenon. Barnyardgrass was found more suppressive to corn seed germination than purple nutsedge. Additional index words: allelopathic potential, purple nutsedge, barnyardgrass, weed extract, plant residue, germination, corn. |
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