草业科学
草業科學
초업과학
Pratacultural Science
2015年
10期
131-138
,共8页
白滨藜%温周期%NaCl 胁迫%苞片%种子萌发
白濱藜%溫週期%NaCl 脅迫%苞片%種子萌髮
백빈려%온주기%NaCl 협박%포편%충자맹발
Atriplex cana%temperature%NaCl stress%bracts%germination
白滨藜是具有抗旱、抗盐碱和耐贫瘠能力的半灌木，为新疆地区的良等牧草。通过研究温度、贮藏时间、苞片及盐分对白滨藜种子萌发的影响，结果表明：白滨藜种子萌发的最适温度为20／30℃和25／35℃。室温干藏2～8个月显著提高种子的萌发速率，干藏10个月后，种子萌发速率与萌发率显著降低。苞片延缓种子吸胀，对种子的最终萌发率有显著影响；去除苞片可以明显促进种子的萌发。浓度低于0．8 mol／L 的 NaCl 溶液对种子萌发的影响不大；但从0．8 mol／L 起萌发率随着浓度增高而降低，直至为零；将在0．05～4．00 mol／L 盐溶液中处理的种子转移至蒸馏水后，仍有一定的萌发恢复率，表明 NaCl 处理后的部分种子有保持活力的能力，部分种子丧失活力。对白滨藜种子萌发特性的研究，为揭示其萌发行为进化和生态适应机制提供科学依据，也为新疆荒漠盐碱地区饲用半灌木引种改良，良种繁育提供基础资料。
白濱藜是具有抗旱、抗鹽堿和耐貧瘠能力的半灌木，為新疆地區的良等牧草。通過研究溫度、貯藏時間、苞片及鹽分對白濱藜種子萌髮的影響，結果錶明：白濱藜種子萌髮的最適溫度為20／30℃和25／35℃。室溫榦藏2～8箇月顯著提高種子的萌髮速率，榦藏10箇月後，種子萌髮速率與萌髮率顯著降低。苞片延緩種子吸脹，對種子的最終萌髮率有顯著影響；去除苞片可以明顯促進種子的萌髮。濃度低于0．8 mol／L 的 NaCl 溶液對種子萌髮的影響不大；但從0．8 mol／L 起萌髮率隨著濃度增高而降低，直至為零；將在0．05～4．00 mol／L 鹽溶液中處理的種子轉移至蒸餾水後，仍有一定的萌髮恢複率，錶明 NaCl 處理後的部分種子有保持活力的能力，部分種子喪失活力。對白濱藜種子萌髮特性的研究，為揭示其萌髮行為進化和生態適應機製提供科學依據，也為新疆荒漠鹽堿地區飼用半灌木引種改良，良種繁育提供基礎資料。
백빈려시구유항한、항염감화내빈척능력적반관목，위신강지구적량등목초。통과연구온도、저장시간、포편급염분대백빈려충자맹발적영향，결과표명：백빈려충자맹발적최괄온도위20／30℃화25／35℃。실온간장2～8개월현저제고충자적맹발속솔，간장10개월후，충자맹발속솔여맹발솔현저강저。포편연완충자흡창，대충자적최종맹발솔유현저영향；거제포편가이명현촉진충자적맹발。농도저우0．8 mol／L 적 NaCl 용액대충자맹발적영향불대；단종0．8 mol／L 기맹발솔수착농도증고이강저，직지위령；장재0．05～4．00 mol／L 염용액중처리적충자전이지증류수후，잉유일정적맹발회복솔，표명 NaCl 처리후적부분충자유보지활력적능력，부분충자상실활력。대백빈려충자맹발특성적연구，위게시기맹발행위진화화생태괄응궤제제공과학의거，야위신강황막염감지구사용반관목인충개량，량충번육제공기출자료。
Atriplex cana is a xerophytic subshrub with drought resistance,salinity resistance and low fertility tolerance.It is a useful forage plant in Xinjiang.Experiments were conducted to determine the effects of tem-perature,seed bract removal,and NaCl on seed germination.Seeds were able to germinate in a range of tem-peratures from 5/15℃ to 25/35℃.The higher the temperature,the faster the germination occurred.The opti-mum temperature regime for seed germination was 20/30℃ and 25/35℃.Under a 25℃ dark/35℃ light re-gime,the final germination percentage reached a maximum value after 6-8 days of hydration,while under 5/15℃ and 10/20℃ temperature regimes final germination percentage was achieved after 25-34 days.There was a significant increase in seed germination rate after 2-8 months seed storage,while germination percentage of seeds decreased when exposed to natural atmospheric conditions for 10 months.Bracts formed a mechanical barrier to water uptake,and has a significant influence on the final seed germination rate.Removal of bracts promoted seed germination.Germination was not affected by NaCl at concentrations below 0.8 mol/L,but was decreased by NaCl at higher concentrations.Seeds incubated in NaCl at concentrations of 0.05-4.00 mol/L re-covered after being transferred to distilled water.After NaCl treatment some seeds retained their vigor,while others lost vigor.Research into seed germination characteristics may reveal a scientific basis for this ecological adaptation trait.Such research may also provide basic data for improvement salinity tolerant forage subshrub production in the Xinjiang desert.
