干旱区生态环境知识资源中心(Arid): 荒漠草原短花针茅表型特征可塑性对放牧的响应

Arid

	荒漠草原短花针茅表型特征可塑性对放牧的响应
其他题名	Response of Plasticity of Phenotypic Traits of Stipa breviflora in Desert Steppe to Grazing
	贾丽欣; 杨阳; 乔荠瑢; 张峰; 赵萌莉
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2018
卷号	40 期号:5 页码:64-69
中文摘要	在内蒙古四子王旗短花针茅荒漠草原测定不同放牧强度下短花针茅的表型特征,包括株高、基丛径、地上生物量、分蘖等性状指标。结果表明:短花针茅的株高不受株丛大小调控但分蘖数量随株丛的增大而显著增加。放牧能够调控植物表型特征的可塑性,可塑性指数越高受放牧强度的影响越大。地上生物量和分蘖数较株高和株丛径更易受放牧强度干扰。短花针茅高度表型,中、小株丛的可塑性较大株丛更强;短花针茅分蘖表型,大株丛的可塑性较中、小株丛更强。重度放牧使小株丛在分蘖表型上的可塑性大大提高,但重牧下短花针茅高度表型可塑性差异消失,说明重度放牧导致短花针茅矮化已经达到可以消除自身高度差异的程度。
英文摘要	The phenotypic characteristics of Stipa breviflora under different grazing intensities, including plant height, basal diameter, aboveground biomass, tiller and other traits, were determined to explore the response of phenotypic plasticity of Stipa breviflora to grazing intensity. The results showed that the height of Stipa breviflora was not controlled by the size of the plantlets but the number of tillers increased significantly with the increase of the plantlets. The plasticity of plant phenotypic characteristics was controlled by grazing intensity, and the greater the grazing intensity, the higher the plasticity index. Above-ground biomass and tillering number were phenotypic characteristics that were more susceptible to grazing interference than plant height and basal diameter. The plasticity of height of medium and small plants of Stipa breviflora was stronger than large plants. The plasticity of tiller of large plants was stronger than the medium and small plants. However, the difference in height phenotypic plasticity disappeared under heavy grazing, indicating that severe grazing resulted in shortening of Stipa brevipes to a degree that could eliminate the difference in height. Heavy grazing also greatly increased the plasticity of the tillering phenotype of small plants, but the reason is still unclear.
中文关键词	短花针茅 ; 分蘖 ; 表型特征 ; 放牧强度
英文关键词	Tillering Biomass Phenotypic characteristics Grazing intensity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6342786
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/2XILL650/238665
作者单位	内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	贾丽欣,杨阳,乔荠瑢,等. 荒漠草原短花针茅表型特征可塑性对放牧的响应[J]. 内蒙古农业大学,2018,40(5):64-69.
APA	贾丽欣,杨阳,乔荠瑢,张峰,&赵萌莉.(2018).荒漠草原短花针茅表型特征可塑性对放牧的响应.中国草地学报,40(5),64-69.
MLA	贾丽欣,et al."荒漠草原短花针茅表型特征可塑性对放牧的响应".中国草地学报 40.5(2018):64-69.