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

	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
其他题名	Effect of nitrogen addition on seed germination competition of Phragmites australis and Suaeda salsa under salt stress
	李梅 1; 张琳 1; 路峰 3; 吴梦迪 1; 于君宝4 ; 张晓龙 1; 管博2
发表期刊	生态科学
ISSN	1008-8873
	2020
卷号	39.0 期号:004 页码:113-118
关键词	盐地碱蓬芦苇 NaCl 发芽发芽速度
英文摘要	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。
中文摘要	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 300mmol·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(20mmol·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(0,100mmol·L^-1),the germination rate of P.australis in mixed treatment was higher than that in alone treatment.When the salt concentration increased(400mmol·L^-1),the germination rate of P.australis was inhibited in mixed treatment.And high nitrogen(40mmol·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.
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.cn/handle/133337/28264
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学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中国科学院海岸带环境过程与生态修复重点实验室_滨海湿地实验室
作者单位	1.烟台大学 2.中国科学院烟台海岸带研究所 3.山东黄河三角洲国家级自然保护区 4.鲁东大学
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,2020,39.0(004):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,39.0(004),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 39.0.004(2020):113-118.

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