干旱区生态环境知识资源中心(Arid): 气温和土壤湿度变化对3种典型荒漠植物种子发芽的影响

Arid

	气温和土壤湿度变化对3种典型荒漠植物种子发芽的影响
其他题名	The Effects of Change in Temperature and Soil Moisture on the Seed Germination of Three Typical Desert Plants
	吴建国 1; 苌伟 2; 吕佳佳 1
ISSN	1001-6929
出版年	2009
卷号	22 期号:3 页码:343-350
中文摘要	植物种子发芽对气温和土壤湿度变化的响应是气候变化对荒漠生态系统影响的关键,为了分析荒漠植物种子发芽对气温和土壤湿度变化的响应趋势,选择典型荒漠植物沙拐枣(Calligonum mongolica)、泡泡刺(Nitraria sphaerocarpa)和麻黄(Ephedra przewalskii),在人工气候箱中分析在3种土壤湿度(3%,5%和15%),2种气温(16℃/22℃和21℃/27℃)和浸种(12h)与不浸种处理下种子的发芽趋势.结果显示:沙拐枣和泡泡刺种子的发芽率随土壤湿度的增加而增加,浸种下随气温的升高其发芽率增幅比不浸种下大;不浸种下气温升高麻黄种子发芽率增幅比不浸种下大,浸种下土壤湿度为3%时气温升高其发芽率增幅比土壤湿度为5%和15%时大(P<0.05).3种植物种子发芽指数随气温的升高和土壤湿度的增加而增加,不浸种下气温升高沙拐枣和泡泡刺种子的发芽指数显著增加,浸种下其发芽指数增幅不大;不浸种下气温升高麻黄种子发芽指数增幅较小,浸种下其发芽指数增幅较大.3种植物种子均在培养初期发芽速率增加较快.荒漠植物种子发芽受气温和土壤湿度的共同影响,不同植物种子发芽对这些因素的变化有不同的响应.
英文摘要	The response of plant seed germination to changes in temperature and soil moisture is crucial to the impact of climate change on the desert ecosystem. In order to analyze the response trend of seed germination of desert plants to changes in temperature and soil moisture, three typical desert plants Mongolian Calligonum ( Calligonum mongolica ) , Nitraria Sphaerocarpa ( Nitraria sphaerocarpa) and Ma Huang ( Ephedra pnewalskii) were chosen, and their seed germinations in different air temperature (16 ℃ / 22 ℃ and 21 ℃ / 27 ℃) , soil moistures (3% , 5% and 15% ) , soaking (12 h) and without soaking in artificial climatic chambers were investigated. The results showed that, for Mongolian Calligonum and Nitraria Sphaerocarpa, the seed germination percentages increased with increasing soil moisture; and, with increasing air temperature, the seed germination percentage increased more for soaked seeds than for unsoaked seeds. For Ma Huang, with increasing air temperature, the seed germination percentage increased more for unsoaked seeds than for soaked seeds; and, the increase of seed germination percentage with increasing air temperature for soaked seeds under 3% soil moisture was higher than that under 5% or 15% soil moisture (P<0.05) . The index of seed germination for Mongolian Calligonum, Nitraria Sphaerocarpa and Ma Huang increased with increasing soil moisture or air temperature. For Mongolian Calligonum and Nitraria Sphaerocarpa, the increase of seed germination index with increasing air temperature for unsoaked seeds was higher than for soaked seeds. For Ma Huang, the increased of seed germination index with increasing air temperature for soaked seeds was higher than for unsoaked seeds. The seed germination rates for the three plants increased quickly during the early and middle incubation periods. The seed germination of these desert plants was influenced by the air temperature and soil moisture together, and the responses of different plant seed germinations to changes in these factors were different.
中文关键词	荒漠生态系统 ; 种子发芽 ; 气候变化
英文关键词	desert ecosystem seed germination climate change
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3547740
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223848
作者单位	1.中国环境科学研究院, 北京 100012, 中国; 2.北京林业大学, 教育部北京市省部共建森林培育与保护重点实验室, 北京 100083, 中国
推荐引用方式 GB/T 7714	吴建国,苌伟,吕佳佳. 气温和土壤湿度变化对3种典型荒漠植物种子发芽的影响[J]. 北京林业大学,2009,22(3):343-350.
APA	吴建国,苌伟,&吕佳佳.(2009).气温和土壤湿度变化对3种典型荒漠植物种子发芽的影响.,22(3),343-350.
MLA	吴建国,et al."气温和土壤湿度变化对3种典型荒漠植物种子发芽的影响".22.3(2009):343-350.