干旱区生态环境知识资源中心(Arid): 围封对荒漠草原植物群落与土壤养分变化的影响

Arid

	围封对荒漠草原植物群落与土壤养分变化的影响
其他题名	Effect of Enclosed Grassland of Desert Steppe on the Plant Community and Soil Nutrients
	刘铁军; 杨劼; 郭建英; 李锦荣; 王丽霞; 董智
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2019
卷号	41 期号:5 页码:86-93
中文摘要	为进一步阐明围封对荒漠草原植物群落特征及土壤养分变化的影响规律,采用野外调查与室内分析的方法,分别对内蒙古希拉穆仁荒漠草原上东河小流域放牧样地、围封样地进行植被群落样方调查与土壤样品养分含量测定。结果表明:围封后,植物群落结构发生了显著变化,放牧样地植物群落以冷蒿、银灰旋花和针茅为优势种,围封3年后样地群落优势种改变为针茅、冰草和糙隐子草。放牧样地的植物物种数基本保持在18种左右,随着围封年限的增加,物种数减少,围封13年物种数减少至8种。围封显著提高了植物群落的高度、盖度和地上生物量,降低了群落的丰富度指数和多样性指数。其中,围封13年的地上生物量是围封前的5倍,为217.67g/m~2;群落盖度,围封前23.82%、围封3年34%、围封7年47%、围封13年达到70.33%。围封恢复使得土壤养分(全氮、全磷、全钾、速效氮、速效磷、速效钾、有机质)大都呈增加趋势,土壤有机质与地上生物量呈极显著的正相关关系(P< 0.01)、全钾、全磷与地上生物量呈显著正相关关系(P< 0.05)。如果考虑水量平衡因素,控制好围封时间与空间尺度,对干旱半干旱地区荒漠草原生态修复具有重要意义。
英文摘要	To explore the effect of enclosure on alternations of characteristics of plant communities and soil nutrients, filed investigation integrated with chemical analysis were used to investigate plant communities and contents of soil nutrients in Xilamuren desert grassland under enclosure or grazing conditions. The results showed that the structure of plant community changed significantly after enclosure of degraded desert grassland. The dominant species were Artemisia frigida,Convolvulus ammannii,Stipa capillata Linn. in grazing plots. After enclosure for 3 years, the dominant species were changed into Stipa capilLata Linn.,Agropyron cristatum (Linn.) Gaertn. and Cleistogenes squarrosa (Trin.) Keng. The number of plant species of grazing plots was basically 18 species. With the duration of enclosure,the number of species decreased gradually that only 8 species left after 13 years of enclosure. However, enclosure not only significantly increased the height, coverage and aboveground biomass of the plant community but also decreased the richness index and diversity index of the community. The aboveground biomass increased from 44.24 g/m~2 to 217.67 g/m~2 in plots under 13 years enclosure. The community coverage was 23.82% before the enclosure,which increased to 34%, 47% and 70.33%,respectively, after 3,7,and 13 years enclosure. The enclosure of degraded desert grassland facilitated the restoration of soil nutrients (N,P, K,mineral nitrogen, mineral P, mineral K and organic matter), which almost all increased. The aboveground biomass was positively correlated with soil organic matter (P< 0.01) and total K and P (P< 0.05). If the water balance is considered and the duration and area of enclosure is well managed,it will be great significant to the ecological restoration of arid and semi-arid desert grassland.
中文关键词	荒漠草原 ; 围封 ; 植物群落 ; 土壤养分
英文关键词	Desert steppe Enclosure Plant community Soil nutrients
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:6600259
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316305
作者单位	刘铁军, 水利部牧区水利科学研究所, 呼和浩特, 内蒙古 010020, 中国.; 郭建英, 水利部牧区水利科学研究所, 呼和浩特, 内蒙古 010020, 中国.; 李锦荣, 水利部牧区水利科学研究所, 呼和浩特, 内蒙古 010020, 中国.; 王丽霞, 水利部牧区水利科学研究所, 呼和浩特, 内蒙古 010020, 中国.; 杨劼, 内蒙古大学生态与环境学院, 呼和浩特, 内蒙古 010050, 中国.; 董智, 山东农业大学林学院, 泰安, 山东 271018, 中国.
推荐引用方式 GB/T 7714	刘铁军,杨劼,郭建英,等. 围封对荒漠草原植物群落与土壤养分变化的影响[J],2019,41(5):86-93.
APA	刘铁军,杨劼,郭建英,李锦荣,王丽霞,&董智.(2019).围封对荒漠草原植物群落与土壤养分变化的影响.中国草地学报,41(5),86-93.
MLA	刘铁军,et al."围封对荒漠草原植物群落与土壤养分变化的影响".中国草地学报 41.5(2019):86-93.