干旱区生态环境知识资源中心(Arid): 封育对荒漠草地生态系统C、N、P化学计量特征的影响

Arid

	封育对荒漠草地生态系统C、N、P化学计量特征的影响
其他题名	Effects of Enclosure on Stoichiometric Characteristics of C,N,P in Desert Grassland Ecosystem
	范燕敏; 武红旗; 靳瑰丽; 谢昀
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2018
卷号	40 期号:3 页码:76-81
中文摘要	对比干旱区伊犁绢蒿荒漠草地放牧、封育2年、封育9年的植被、根系及土壤C、N、P元素的变化,以揭示封育对生态系统养分及其化学计量比的影响。结果表明,封育后土壤有机碳含量变化不大,全氮含量稳步提高,全磷含量稍有降低。封育2年的植被和0~5cm土层根系的N/P高于放牧,表明恢复初期植物对N的利用率较高;封育9年的植被和根系N/P降低,表明植被恢复后植物对P素的利用率提高。封育对植被的C/N影响不大,但长期封育使根系的C/N升高,表明长期封育使根系固碳显著。相关分析表明,土壤P、植被P、根系P之间没有显著相关,但是根系P与根系C、植被N和土壤C显著相关,表明在干旱区土壤缺磷的环境下,植物对P素的吸收与利用是通过其他元素来间接影响的。
英文摘要	C,N and P are the main objects of ecological stoichiometry,which can be used to characterize plant nutrient utilization and response to environmental changes.In the study,through comparing the C,N,P changes of plants,roots and soil in graze,enclosure for 2 years and enclosure for 9 years,the effects of enclosure on nutrients and stoichiometric ratio were reveal in the Seriphidium transiliense desert grassland ecosystem.The results showed that the soil organic carbon did not change greatly,the total nitrogen increased steadily,and the total phosphorus decreased slightly after fenced.In grassland of enclosure for 2 years,the N/P values of plants and roots in 0~5cm soil layer were higher than that of graze,indicating that the utilization rate of N was higher in the early stage of grassland restoration.After enclosure for 9 years,the N/P values of plants and roots decreased,showing that the utilization of P was improver after long-term restoration.The enclosure measure had little effect on the C/N of plants,but the C/N of the roots were increased in the long-term enclosure,indicating that the long-term enclosure increased carbon sequestration of root significantly.The correlation analysis showed that there were no significant correlations among soil P,community P and root P,but root P was related to root C,plant N and soil C,showing that the absorption and utilization of P element in plants were indirectly affected by the other elements in the environment of soil phosphorus deficiency in arid region.
中文关键词	伊犁绢蒿 ; 荒漠草地 ; 生态系统 ; 封育 ; 生态化学计量学
英文关键词	Seriphidium transiliense Desert grassland Ecosystem Enclosure Ecological stoichiometry
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:6247161
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238660
作者单位	新疆农业大学草业与环境科学学院, 新疆土壤与植物生态过程重点实验室, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	范燕敏,武红旗,靳瑰丽,等. 封育对荒漠草地生态系统C、N、P化学计量特征的影响[J]. 新疆农业大学,2018,40(3):76-81.
APA	范燕敏,武红旗,靳瑰丽,&谢昀.(2018).封育对荒漠草地生态系统C、N、P化学计量特征的影响.中国草地学报,40(3),76-81.
MLA	范燕敏,et al."封育对荒漠草地生态系统C、N、P化学计量特征的影响".中国草地学报 40.3(2018):76-81.