干旱区生态环境知识资源中心(Arid): 放牧调控对短花针茅种群年龄及叶性状的影响

Arid

	放牧调控对短花针茅种群年龄及叶性状的影响
其他题名	Effect of grazing on Stipa breviflora age dynamics and leaf traits
	刘文亭 1; 卫智军1 ; 吕世杰 2; 王天乐 1; 张爽 1; 海松 3
来源期刊	草业学报
ISSN	1004-5759
出版年	2017
卷号	26 期号:1 页码:63-71
中文摘要	草食动物对植物种群结构和功能的调控机制是放牧生态学研究的重要内容。本研究以内蒙古锡林郭勒盟苏尼特右旗荒漠草原的长期放牧控制实验为平台,通过研究荒漠草原建群种短花针茅种群年龄动态与其相应叶性状,以期揭示荒漠草地放牧调控下植物响应机制。结果显示,1)短花针茅种群基径小于4mm部分植株存活数少;适度放牧处理短花针茅各年龄阶段频度与不放牧基本一致,重度放牧处理龄级Ⅲ的频度和比例分别下降了0.79, 0.73;2)短花针茅种群龄级Ⅰ与龄级Ⅱ的短花针茅频度和比例较高,龄级Ⅲ相对较低,属于比较稳定的种群;Godron指数显示短花针茅年龄结构的稳定性重度放牧>适度放牧>不放牧;3)放牧调控下,叶高、叶长、叶干重、叶直立度、叶长宽比为年龄型敏感性状,自然叶宽、完全叶宽、叶卷曲度、叶干物质含量为年龄型保守性状;4)相关分析认为自然叶宽和叶干物质含量与各年龄型敏感性状基本呈协同变化;叶卷曲度与叶干重负相关(P<0.05),与叶直立度呈正相关(龄级Ⅲ、龄级Ⅰ)。研究认为,短花针茅种群在亚稳定下,通过控制种群年龄及叶性状,来完成其生活史对放牧调控的适应。
英文摘要	The regulation mechanism of plant population structure and function by herbivores is an important part of grazing ecology.A long-term grazing study in Xilingol was used to reveal the mechanisms of the regulation of plant responses to grazing through population age dynamics and leaf traits of Stipa breviflorain desert grassland.The result showed that few S.breviflora plants with base diameter of less than 4mm survived. There was little difference between moderate grazing and no grazing.The frequency and proportion of age class Ⅲplants was reduced 0.79and 0.73respectively by heavy grazing.S.breviflora population were relatively stable.Two way ANOVA showed that leaf height,leaf length,leaf dry weight,leaf erectness and leaf lengthwidth ratio were sensitive to grazing in different age classes.By contrast,leaf width,leaf rolling index and leaf dry matter content were not affected by age class.Correlation analysis suggested that leaf width and leaf dry matter content changed synergistically with the age sensitive traits.Leaf rolling index was significantly negatively correlated with leaf dry weight,and was positively related with leaf erectness(e.g.age classⅢand class Ⅰ).The study suggested that S.breviflora completed its life history and adapted to grazing by controlling population age and leaf traits in a metastable state.
中文关键词	种群年龄 ; 叶性状 ; 放牧 ; 短花针茅 ; 荒漠草地
英文关键词	population age leaf trait grazing Stipa breviflora desert grassland
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:5898125
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/2XILL650/235690
作者单位	1.内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010019, 中国; 2.内蒙古农业大学理学院, 呼和浩特, 内蒙古 010018, 中国; 3.内蒙古苏尼特右旗地震局, 苏尼特右旗, 内蒙古 011200, 中国
推荐引用方式 GB/T 7714	刘文亭,卫智军,吕世杰,等. 放牧调控对短花针茅种群年龄及叶性状的影响[J]. 内蒙古农业大学,2017,26(1):63-71.
APA	刘文亭,卫智军,吕世杰,王天乐,张爽,&海松.(2017).放牧调控对短花针茅种群年龄及叶性状的影响.草业学报,26(1),63-71.
MLA	刘文亭,et al."放牧调控对短花针茅种群年龄及叶性状的影响".草业学报 26.1(2017):63-71.