干旱区生态环境知识资源中心(Arid): 载畜率对荒漠草原群落及植物功能群生物量的影响

Arid

	载畜率对荒漠草原群落及植物功能群生物量的影响
其他题名	Effects of Stocking Rates on the Biomass of Desert Steppe Community and Plant Functional Group
	古琛; 杜宇凡; 乌力吉; 陈万杰; 薛文杰; 赵萌莉
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2015
卷号	24 期号:12 页码:1962-1968
中文摘要	以内蒙古短花针茅(Stipa breviflora)草原为研究对象,设置4个载畜率水平的随机区组实验,根据生活型和不同光合途径划分植物功能群,探讨载畜率对群落地上地下生物量和不同功能群生物量的影响。结果表明:群落地上生物量随载畜率的增大而显著降低(P<0.05),且二者呈负相关关系,回归方程Y=281.54-53.47X;地下生物量呈"T"字型分布,约80%生物量集中分布在0~20 cm土层中,载畜率对地下生物量及分布无显著影响(P>0.05);群落根冠比在7~12之间,随载畜率的增大而显著增大(P<0.05)。载畜率对C_4植物地上生物量无显著影响(P>0.05),但其相对生物量随载畜率的增大而增大,C_3植物地上生物量与相对生物量均随载畜率的增大而降低(P<0.05)。多年生丛生禾草地上生物量相对稳定,受载畜率的影响差异不显著(P>0.05);其相对生物量在群落中最高,且均随载畜率的增大而增大(P<0.05);灌木、半灌木和小半灌木的地上生物量随载畜率的增大而减小(P<0.05),但其相对生物量除重度放牧显著最低(P<0.05)外,其他处理之间无显著差异(P>0.05);多年生杂类草、多年生根茎禾草和一、二年生植物地上生物量与相对生物量均随载畜率的增大而显著降低(P<0.05),多年生根茎禾草在轻度放牧下就几乎消失,而一、二年生植物在重度放牧下消失。
英文摘要	Desert steppe of Stipa breviflora in Inner Mongolia was taken as the object, and randomized block experiment was set based on 4 stocking rates, as well as plant functional groups were divided according to different life forms and photosynthetic pathways to study the effects of different stocking rates on above-and-underground biomass of community and the biomass of different functional groups. The results indicated that with stocking rates raised, aboveground biomass of community was dropping (P<0.05), and they were negative correlated as well, the regression equation was Y=281.54-53.47X. Belowground biomass distributed like "T", and about 80 percent of it concentrated on 0~20 cm soil, meanwhile, it was not effected significantly by stocking rates (P>0.05). However, the root shoot ratio which between 7 and 12 was increasing with the stocking rates added. Aboveground biomass of C_4 was also not influenced remarkably, whereas its relative biomass was upgrading and both of aboveground and relative biomass of C_3 were reducing markedly by stocking rates increased (P<0.05). Aboveground biomass of perennial bunchgrass was not impacted (P>0.05) but its relative biomass, the highest one in community, was advancing with stocking rates ascended (P<0.05). On the contrary, the aboveground biomass of shrub, subshrub and semishrub was declining (P<0.05), whereas its relative biomass was stable except it was the lowest in heavy grazing (P>0.05). Both aboveground and relative biomass of perennial forbs, perennial rhizome grasses, annuals and biennials were decreasing respectively by stocking rates enlarged (P<0.05), and even perennial rhizome grasses practically disappeared under light grazing as well as annuals and biennials vanished under heavy grazing.
中文关键词	荒漠草原 ; 载畜率 ; 功能群 ; 生物量
英文关键词	desert steppe stocking rates functional group biomass
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:5614535
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/2XILL650/233121
作者单位	内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	古琛,杜宇凡,乌力吉,等. 载畜率对荒漠草原群落及植物功能群生物量的影响[J]. 内蒙古农业大学,2015,24(12):1962-1968.
APA	古琛,杜宇凡,乌力吉,陈万杰,薛文杰,&赵萌莉.(2015).载畜率对荒漠草原群落及植物功能群生物量的影响.生态环境学报,24(12),1962-1968.
MLA	古琛,et al."载畜率对荒漠草原群落及植物功能群生物量的影响".生态环境学报 24.12(2015):1962-1968.