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海盐胁迫对苇状羊茅和多花黑麦草种子发芽的影响 预览 被引量:15

Effect of Sea-salt Stress on Germination of Tall Fescue and Italian Ryegrass
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摘要 用不同浓度的海盐溶液处理,研究了苇状羊茅Festuca arundinacea和多花黑麦草Lolium multiflorum种子在发芽阶段对海盐胁迫的反应.结果表明,海盐浓度低于6.4 g/L时,2种牧草种子的发芽不受影响;随海盐处理浓度增高,种子发芽率和种子活力指数逐渐下降.2种牧草相比,多花黑麦草种子发芽阶段对海盐的耐受性高于苇状羊茅.苇状羊茅和多花黑麦草种子发芽率降至50%的农业盐渍临界值的海盐浓度分别为19.98和22.78g/L. Germination response of tall fescue (Festuca arundinacea cv. Fawn) and Italian ryegrass (Lolium multiflorum cv .Barspectra) treated with sea-salt solutions were studied. The results showed that irrigation with sea-salt solution lower than 6.4 g/L had no effects on germination of both species. With salinity increasing, germination rate and seed vigor index decreased gradually. The sea-salt tolerance of Italian ryegrass during germination period was higher than that of tall fescue. Sea-salt concentration causing 50% germination rate decrease in tall fescue and Italian ryegrass were 19.98 (g/L) and 22.78 g/L, respectively.
作者 于辉 沈益新 YU Hui, SHEN Yi-xin (College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China)
出处 《草业科学》 CAS CSCD 2004年第10期 41-44,共4页 Pratacultural Science
基金 江苏省科技厅推广项目,南方农区奶业现代化生产技术集成与产业化示范项目
关键词 海盐胁迫 苇状羊茅 多花黑麦草 种子发芽 Italian ryegrass germination sea-salt stress tall fescue vigor index
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