其他题名Effect of nitrogen addition on seed germination competition of Phragmites australis and Suaeda salsa under salt stress
李梅1,2; 张琳1,2; 路峰3; 吴梦迪1,2; 于君宝4
; 张晓龙1; 管博2发表期刊生态科学
ISSN1008-8873
2020
卷号39期号:4页码:113-118
关键词盐地碱蓬芦苇发芽发芽速度
研究领域Plant Sciences
英文摘要To investigate the competitive relationship between Suaeda salsa and Phragmites australis in the Yellow River Delta under different salt stress conditions during the period of the seed germination,the seed germination percentage and germination rate under different concentrations of nitrogen and salt,were measured for the two species germinated alone and mixed.The influence of nitrogen addition on their competitive relationship was also detected.The results showed that salt stress had significant effects on the germination percentage of S.salsa and P.australis.When the salt concentration was lower than 300 mmol·L~(-1),the germination rate of S.salsa changed insignificantly,but the germination rate of P.australis decreased significantly with the increasing salt concentration.Under the low level of salt concentration,nitrogen addition did not significantly affect the germination percentage of the two species.However,the moderate nitrogen addition(20 mmol·L~(-1))significantly increased the germination rate under high salt stress.When the seeds of two species mixed,the germination rate of P.australis increased significantly at a low salt level,but the differences of the germination rate between species alone and mixed treatments became less when the concentration of salt increased.Under low salt treatment,the germination rate of S.salsa germinated alone was significantly higher than that of seeds in mixed treatment,and nitrogen addition had no significant effect on the germination rate of S.salsa.Under the low salt condition(0,100 mmol·L~(-1)),the germination rate of P.australis in mixed treatment was higher than that in alone treatment.When the salt concentration increased(400 mmol·L~(-1)),the germination rate of P.australis was inhibited in mixed treatment.And high nitrogen(40 mmol·L~(-1))could significantly alleviate the inhibitory effect of mixed treatment on P.australis germination.Our results could provide a theoretical basis for the study on the ecological adaptation mechanism of typical coastal species in the Yellow River Delta.
中文摘要为了探讨黄河三角洲盐地碱蓬和芦苇种子萌发阶段在不同盐胁迫条件的竞争关系,以及氮添加对其竞争的影响,本实验采用培养皿纸上发芽床法,分析了不同浓度氮、盐及混合培养等条件下两种种子发芽率、发芽速度的响应。结果表明,盐胁迫对盐地碱蓬和芦苇种子发芽率均有显著性影响,盐浓度低于300 mmol·L~(-1)时盐地碱蓬发芽率并未有显著降低,而芦苇种子发芽率随着盐浓度增加而呈现显著降低趋势;低盐条件下,氮添加未对两物种发芽率产生显著影响,但高盐胁迫条件下适度的氮添加显著增加了种子发芽率。混合培养显著增加了低盐环境中芦苇的发芽率,当盐胁迫浓度升高时,培养模式对两物种发芽率影响程度降低。对于发芽速度而言,低盐处理下单独培养盐地碱蓬的发芽速度显著高于混合培养,氮添加对盐地碱蓬发芽速度未产生显著影响;而低盐条件(0、100 mmol·L~(-1))下芦苇的发芽速度则是在混合培养高于单独培养方式,当盐浓度升高(400 mmol·L~(-1))时,混合培养抑制了芦苇的发芽速度,此时,高氮(40 mmol·L~(-1))添加处理则能够显著缓解混合培养对芦苇发芽的抑制作用。研究结果可以为黄河三角洲滨海典型物种生态适应机制研究提供一定的理论依据。
文章类型Article
资助机构国家自然科学基金项目; 国家自然科学基金山东联合基金重点支持项目
收录类别CSCD
语种中文
CSCD记录号CSCD:6812833
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/30336
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
作者单位1.烟台大学,环境材料与工程学院,烟台264005;
2.中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所),山东省海岸带环境过程重点实验室,中国科学院烟台海岸带研究所,烟台264003;
3.山东黄河三角洲国家级自然保护区管理委员会,东营257091;
4.鲁东大学,滨海生态高等研究院,烟台264025
推荐引用方式
GB/T 7714李梅,张琳,路峰,等. 氮添加对盐胁迫条件下芦苇和盐地碱蓬种子萌发竞争的影响[J]. 生态科学,2020,39(4):113-118.
APA李梅.,张琳.,路峰.,吴梦迪.,于君宝.,...&管博.(2020).氮添加对盐胁迫条件下芦苇和盐地碱蓬种子萌发竞争的影响.生态科学,39(4),113-118.
MLA李梅,et al."氮添加对盐胁迫条件下芦苇和盐地碱蓬种子萌发竞争的影响".生态科学 39.4(2020):113-118.
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