干旱区生态环境知识资源中心(Arid): 短花针茅荒漠草原物种多样性及生产力对长期不同放牧强度的响应

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	短花针茅荒漠草原物种多样性及生产力对长期不同放牧强度的响应
其他题名	Response of Species Diversity and Productivity to Long-term Grazing in the Stipa breviflora Desert Steppe
	韩梦琪; 王忠武; 靳宇曦; 康静; 李江文; 王悦华; 王舒新; 韩国栋
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2017
卷号	37 期号:11 页码:2273-2281
中文摘要	以内蒙古四子王旗短花针茅(Stipa breviflora)荒漠草原为研究对象,从植物个体尺度入手,通过2016年野外群落调查试验,对荒漠草原不同放牧处理[载畜率分别为0(CK)、0.91(LG)、1.82(MG)、2.71(HG)羊/(hm~2 ·a~(-1))]下的物种组成、植物多样性与生产力的关系进行分析,以揭示荒漠草原群落中的物种组成、物种多样性及其功能群多样性对不同载畜率的响应机制。结果表明:(1)对照区的植物种最多,有13科30种,轻度放牧区只比对照区少野韭(Allium ramosum)1种植物,而中度放牧区和重度放牧区的植物种分别较对照区减少了30%和40%,其中减少的物种大多属于多年生杂类草与多年生根茎禾草两大功能群。(2)多年生丛生禾草在植物群落中占比始终最大(29%~78%),且随着载畜率的增加而增加,而其他功能群均随载畜率增加呈减小的趋势。(3)两种多样性指数中,除了功能群多样性的Margalef丰富度指数,其他多样性指数均在对照区达到最大值,且大小依次为对照>轻度>中度>重度放牧区。(4)物种多样性的3个alpha多样性指数与草地生产力存在显著正相关关系,功能群多样性指数则与生产力无相关关系。研究认为,长期放牧使得荒漠草原群落结构趋于简单化,使多年生丛生禾草形成优势单种;且载畜率的增加使得短花针茅荒漠草原植物的多样性及生产力均显著下降,高水平的多样性会导致高水平的草地生产力,比较2种多样性指数指标,物种多样性指标对荒漠草原生产力的贡献更大。
英文摘要	The study site is located in Siziwang Banner of Inner Mongolia.Taking the Stipa breviflora desert steppe grassland as the research object,based on the individual scale of the plant,we analyzed the relationship between plant species diversity,plant diversity and productivity by field experiment of wild plants in 2016,The responses of the gradient[0(CK),0.91(LG),1.82(MG),2.71(HG)sheep/(hm~2· a~(-1))]were studied.The results showed that:(1)there were 30 species of 13 families and 13 species in the control area,only one species of Allium ramosumin the light grazing area.Compared with the control area, the vegetation species in moderate and heavy grazing areas were reduced by 30%and 40%,respectively, among them,most of the reduced species belonged to perennial miscellaneous grasses and perennial rhi zome grasses.(2)The functional group structure had different responses to the stocking rate,and the perennial clover had always dominated the desert steppe and increased with the increase of the stocking rate. The results showed that the other four functional groups showed a decreasing trend with the increase of the stocking rate.(3)In the two diversity indices,the other diversity indices were in addition to the Margalef index of the functional group diversity and the size of the control>light> moderate>heavy grazing area. (4)The results showed that there was a significant positive correlation between the threealphadiversity index and the grassland productivity(P<0.05),and the functional diversity index had no correlation with the productivity(P >0.05).In summary,the study shows that long-term grazing makes the desert grassland community structure tends to be simplified,so that perennial grassland formation advantages of a single species.In addition,the increase in stocking rate makes the diversity and productivity of S.breviflora desert steppe grassland plants significantly decrease,and high levels of diversity lead to high levels of grassland productivity.Comparing the two diversity index indicators,the species diversity index contributes more to the productivity of the desert grassland.
中文关键词	载畜率 ; 物种组成 ; 物种多样性 ; 功能多样性 ; 草地生产力
英文关键词	stocking rate species composition species diversity functional diversity grassland productivity
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:6133365
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236831
作者单位	内蒙古农业大学草原与资源环境学院, 草地资源教育部重点实验室, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	韩梦琪,王忠武,靳宇曦,等. 短花针茅荒漠草原物种多样性及生产力对长期不同放牧强度的响应[J]. 内蒙古农业大学,2017,37(11):2273-2281.
APA	韩梦琪.,王忠武.,靳宇曦.,康静.,李江文.,...&韩国栋.(2017).短花针茅荒漠草原物种多样性及生产力对长期不同放牧强度的响应.西北植物学报,37(11),2273-2281.
MLA	韩梦琪,et al."短花针茅荒漠草原物种多样性及生产力对长期不同放牧强度的响应".西北植物学报 37.11(2017):2273-2281.