干旱区生态环境知识资源中心(Arid): 氮素和水分添加对荒漠草原短花针茅氮磷特征的影响

Arid

	氮素和水分添加对荒漠草原短花针茅氮磷特征的影响
其他题名	Effects of nitrogen and water addition on herbage N and P concentrations of Stipa breviflora in a desert steppe grassland
	白春利 1; 刘永志 2; 王明玖 1; 单玉梅 2; 哈斯呼 1
来源期刊	草业学报
ISSN	1004-5759
出版年	2016
卷号	25 期号:3 页码:251-256
中文摘要	植物氮(N)、磷(P)含量特征为研究植物的养分利用状况提供了重要的手段。为判断草地生态系统植被限制性元素及对环境的适应策略,在短花针茅荒漠草原的自由放牧区进行了N和水分添加试验,研究在N和水分添加条件下优势植物短花针茅叶的N、P含量及其化学计量特征。通过对N添加、水添加和N水同时添加3个处理的测定表明,短花针茅通过提高叶N含量来增强对贫瘠生境的适应能力。N和水分是影响短花针茅N吸收的限制因子。短花针茅叶N、P含量及N∶P对N添加和水添加的响应在成熟期较枯萎期敏感;N对成熟期叶的N、P含量、N∶P以及枯萎期的N∶P有显著影响,而水分仅对成熟期叶的N、P含量有影响。
英文摘要	Knowledge of herbage nitrogen (N) and phosphorus (P) in plants is fundamental to the study of absorption and utilization of nutrients by the plants. In order to better understand limiting factors and plant adaption strategies to environmental factors in the grassland ecosystem, water and N enhancement experiments were carried out in a Stipa breviflora steppe. Four treatments were set up: nitrogen addition (ND), water addition (WD), nitrogen and water addition (NWD) and control (CK) with five replicates in a free grazed paddock in a S. breviflora desert steppe, Inner Mongolia. The S. breviflora leaf N and P concentrations and their stoichiometry under different treatments were analyzed. It was found that S. breviflora enhanced adaptability to barren habitats by increasing leaf N content. Uptake of N by S. breviflora was limited by low soil N and water contents. The absolute leaf N and P contents and the N∶P ratio were more sensitive to the environmental addition of N and water in mid season than in late season. The availability of environmental N greatly influenced the leaf N and P contents and N∶P ratio in mid season and the N∶P ratio in late season when plants were withering. However, the availability of water only affected the leaf N and P content in mid season and not in late season.
中文关键词	氮素添加 ; 水分添加 ; 短花针茅 ; 氮含量 ; 磷含量 ; 氮磷比
英文关键词	nitrogen addition water addition Stipa breviflora nitrogen content phosphorus content N∶P ratio
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5659700
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/2XILL650/234004
作者单位	1.内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010019, 中国; 2.内蒙古自治区农牧业科学院, 呼和浩特, 内蒙古 010031, 中国
推荐引用方式 GB/T 7714	白春利,刘永志,王明玖,等. 氮素和水分添加对荒漠草原短花针茅氮磷特征的影响[J]. 内蒙古农业大学,2016,25(3):251-256.
APA	白春利,刘永志,王明玖,单玉梅,&哈斯呼.(2016).氮素和水分添加对荒漠草原短花针茅氮磷特征的影响.草业学报,25(3),251-256.
MLA	白春利,et al."氮素和水分添加对荒漠草原短花针茅氮磷特征的影响".草业学报 25.3(2016):251-256.