干旱区生态环境知识资源中心(Arid): 紫茎泽兰入侵对土壤肥力特征的影响及其动态研究

Arid

	紫茎泽兰入侵对土壤肥力特征的影响及其动态研究
其他题名	Effects ofAgeratina adenophora （Spreng.） Invasion on Soil Nutrient Properties and Their Seasonal Dynamics
	蒋智林 1; 刘万学 1; 万方浩 1; 李正跃 2
ISSN	1672-2043
出版年	2008
卷号	27 期号:1 页码:267-272
中文摘要	采用室内分析方法，测定了紫茎泽兰入侵不同年份的种群根际土壤N、P、K养分状况及其季节动态，比较分析了紫茎泽兰入侵对土壤养分影响在其入侵过程中的意义。结果表明，紫茎泽兰的入侵显著提高了根际土壤NH_4~＋-N、NO_3~-N、全钾和有效钾的含量，降低了土壤全磷和有效磷的含量，而对土壤全氮含量没有明显影响。不同入侵种群根际土壤养分含量随季节变化的趋势为：土壤NH_4~＋-N上升，NO_3~-N降低，有效磷和全钾先升后降，而全氮和全磷无明显季节变化，这可能是在年内生长过程中，紫茎泽兰能够通过活化土壤含磷化合物来满足自身生长的需求，对土壤NO_3~-N和有效钾的吸收利用较多，而对土壤NH_4~＋-N的需求较少所致。紫茎泽兰入侵对根际土壤不同肥力特征的正负影响及其自身的适应特性可能是其能够入侵成功和快速扩张蔓延的生态机制之一；应用不同功能型植物建立生态群落以充分利用土壤养分资源，将在紫茎泽兰的生态控制和其入侵地的生态修复中起到较好的效果。
英文摘要	Invasive alien plants have heavily threatened native biodiversity and caused considerable economic loss, so more and more attention has been paid to the assessment of the impact of invasive alien plants on native ecosystems. Here, the effects of invasive plant Ageratina adenophora （Sprengel） R. King ＆ H. Robinson on soil properties and their seasonal dynamics were examined at different habitats along the invaded process ofA. adenophora. Soil samples were collected from rhizosphere zones （about 0～20 cm） at three sites, denoting invasive history ofA. adenophora： non-invaded site, new invaded site and heavily invaded site, at each season （about fifth day of March, June, September and December in 2006, respectively）. The contents of NH_4~＋-N,NO_3~-N, total K and available K in rhizosphere soil at heavily invaded site showed highest, the second in new invaded site and the lowest in non-invaded site. However, the contents of total P and available P in soil among different sites changed in such order： non-invaded site〉new invaded site〉heavily invaded site. And the soil total N content in different sites showed no significant different. Within a year, the soil NH_4~＋-N tended to increase with season＇s development, but the soil NO_3~-N tended to decrease, and the soil total K and available P increased and then decreased. However, the soil total N and P had no obvious change in different seasons. These results indicated that the invasive weed A. adenophora showed high adaptability arid had great positive or negative effects on different soil nutrients at its invaded site, which may facilitate itself growth and inhibit other plant growth. This study provided experimental data both for assessing the impacts of plant invaders on soil and for exploring the mechanism of the successful invasion of A. adenophora. We suggest that reestablishing functional group plant community which may fully use the complementary resource may efficiently control the spread ofA. adenophora and restore the invaded areas.
中文关键词	紫茎泽兰 ; 土壤肥力特征 ; 外来人侵植物 ; 生态修复
英文关键词	Ageratina adenophora （Sprengel） R. King ＆ H. Robinson soil nutrient properties exotic invasive plant ecosystem restoration
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:3202711
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222610
作者单位	1.中国农业科学院植物保护研究所, 植物病虫害生物学国家重点实验室, 北京 100094, 中国; 2.云南农业大学, 农业生物多样性与病虫害控制教育部重点实验室, 昆明, 云南 650201, 中国
推荐引用方式 GB/T 7714	蒋智林,刘万学,万方浩,等. 紫茎泽兰入侵对土壤肥力特征的影响及其动态研究[J],2008,27(1):267-272.
APA	蒋智林,刘万学,万方浩,&李正跃.(2008).紫茎泽兰入侵对土壤肥力特征的影响及其动态研究.,27(1),267-272.
MLA	蒋智林,et al."紫茎泽兰入侵对土壤肥力特征的影响及其动态研究".27.1(2008):267-272.