干旱区生态环境知识资源中心(Arid): 封育对科尔沁沙地植被恢复和土壤特性的影响

Arid

	封育对科尔沁沙地植被恢复和土壤特性的影响
其他题名	Effects of fence enclosure on vegetation restoration and soil properties in Horqin sandy land
	蒋德明 1; 苗仁辉 1; 押田敏雄 2; 周全来 1
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2013
卷号	22 期号:1 页码:40-46
中文摘要	过度放牧是科尔沁地区土地沙化的主要原因之一,围栏封育可以有效的抑制牲畜对植被的破坏,促进沙地植被恢复,从而改善区域的生态环境。本研究以科尔沁沙地主要固沙植被--小叶锦鸡儿群落为对象,采用空间序列代替时间序列的方法,分析不同封育年限和自然放牧条件下小叶锦鸡儿群落的土壤种子库和地上植被特征、土壤理化性质和土壤水分动态,较系统地探讨了封育措施对沙地植被和土壤特性的影响。结果表明:①封育措施促使固沙植被区土壤种子库密度显著增加(P<0.05),封育2 a、6 a和12 a的土壤种子库密度分别提高了15.7%、482.5%和728.1%;土壤种子库的物种多样性和均匀度随着封育年限的增加而降低。②封育措施对沙地植被恢复具有显著的促进作用(P<0.05),封育6 a和12 a后植被密度分别提高了108.0%和239.3%,植物盖度分别提高了261.6%和271.6%;适度的封育年限(<6 a)可以提高群落的物种多样性,过长的封育年限(11 a)反而使物种多样性下降。③封育措施促使土壤表层(0-10 cm)的养分(有机质、全氮、碱解氮、全磷、速效磷、速效钾)含量有所提高,土壤含水量无显著变化(P>0.05)。
英文摘要	Overgrazing generally results in vegetation degradation of grassland, and is one of the main causes leading to desertification development in Horqin Sandy Land in Northeast China. Fenc enclosure is a simple and effective measures for the restoration of degraded vegetation and the improvement of ecological environment and is widely used for this purpose in the sandy land. Caragana microphylla community is the indigenous and dominant vegetation type in the Horqin Sandy Land. The purpose of this study is to determine the effect of the fenc enclosure on vegetation and soil characteristics under the C. microphylla community. Soil seed bank, soil physical and chemical properties, and coverage and composition of vegetation in an age sequence (2-, 6-, and 12-yr) of enclosed C. mirophylla lands were compared with freely grazing land. The results showed that: ①the fence enclosure significantly increase soil seed bank density. The soil seed bank density of 2-, 6-, and 12-yr plots increased by 15.7%, 482.5% and 728.1%, respectively, compared with the free grazing plot,. However, the Shannon-Weiner index, Simpson index and Pielou evenness of soil seed bank decreased with the age; ②the fence enclosure facilitated vegetation restoration. Specifically, the density of vegetation increased by 108.0% and 239.3%, and the coverage of vegetation increased by 261.6% and 271.6% in the 6- and 12-yr plots respectively, compared with the grazing plot time (<6 a) could increase species diversity, while long fencing time (11a) could decrease species diversity. ③the fence enclosure increased nutrient contents (organic matter, total N and P, and available P and K) of topsoil (0-10 cm), while no significant differencs of soil moisture were found among the plots.
中文关键词	科尔沁沙地 ; 封育 ; 土壤种子库 ; 群落特征 ; 物种多样性
英文关键词	Horqin sandy land Fenc enclosure soil seed bank community feature species diversity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4759009
来源机构	中国科学院沈阳应用生态研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229949
作者单位	1.中国科学院沈阳应用生态所, 沈阳, 辽宁 110016, 中国; 2.麻布大学, 相模原, 252-5201, 日本
推荐引用方式 GB/T 7714	蒋德明,苗仁辉,押田敏雄,等. 封育对科尔沁沙地植被恢复和土壤特性的影响[J]. 中国科学院沈阳应用生态研究所,2013,22(1):40-46.
APA	蒋德明,苗仁辉,押田敏雄,&周全来.(2013).封育对科尔沁沙地植被恢复和土壤特性的影响.生态环境学报,22(1),40-46.
MLA	蒋德明,et al."封育对科尔沁沙地植被恢复和土壤特性的影响".生态环境学报 22.1(2013):40-46.