干旱区生态环境知识资源中心(Arid): 养分添加对内蒙古不同草地生态系统生物量的影响

Arid

	养分添加对内蒙古不同草地生态系统生物量的影响
其他题名	Effects of Nutrient Additions on Community Biomass Varied among Different Grassland Ecosystems of Inner Mongolia
	贺星 1; 马文红 1; 梁存柱 1; 红梅 2; 柴曦 1; 赵巴音那木拉 2; 张宇平 1; 杨绍欢 1; 张佳鑫 2; 辛晓平 3
来源期刊	北京大学学报. 自然科学版
ISSN	0479-8023
出版年	2015
卷号	51 期号:4 页码:657-666
中文摘要	为了比较不同气候条件下草地生态系统对养分添加的响应, 在内蒙古的草甸草原、典型草原和荒漠草原区分别建立长期养分添加试验。在三年试验数据的基础上, 分析不同养分(N和P)添加、不同梯度(N: 10, 5和2.5 g/m~2; P: 10 g/m~2)对这3种代表性草地群落生物量及其分配的影响。结果表明, 施氮导致内蒙古温带草原地上生物量增加27%~53.3%, 平均增加37.8%, 并且施氮浓度越高, 地上生物量增加越多。地下生物量对施肥的响应比地上生物量小, 整体上, 高浓度的氮添加使内蒙古草原的群落总生物量平均增加10.2%。较干旱的荒漠草原对氮限制的响应比典型草原和草甸草原更明显。磷肥对群落地上、地下生物量的影响不明显。施氮肥促进草甸草原和荒漠草原的根冠比(R/S)降低, 典型草原的根冠比则轻度增加。施肥对内蒙古温带草原根系的垂直分布没有显著影响。位于不同环境条件下的草地生态系统对施肥的响应存在时间和空间差异, 意味着在碳循环模型预算和草地管理中需要考虑不同草地生态系统对养分添加的响应。草地地上生物量对施肥的响应高于地下部分, 如果不考虑地下部分, 可能会高估整个生态系统对施肥的响应。
英文摘要	In order to compare the response of community biomass to nutrient additions among different grassland ecosystems, the authors established nutrient addition experiments on three grassland ecosystems along the climate gradient, including meadow steppe, typical steppe and desert steppe in Inner Mongolia. On the basis of the threeyear experiment, the impacts of different nutrients (N, P) on different nutrient gradient (N: 10, 5 and 2.5 g/m~2; P: 10 g/m~2) on above- and belowground biomass of these grassland ecosystems was analyzed. The results show that nitrogen leads to a significant increase in the aboveground biomass of grassland in Inner Mongolia by 27% to 53.3%, an average increase of 37.8%. In addition, the response of biomass to N addition increases with the N gradients. Belowground biomass has a less response to fertilization than aboveground biomass. There is an average of 10.2% increase in the total biomass of grassland community in response to N addition. Biomass responds to P addition less deeply than N addition. Furthermore, the response of biomass to nutrient addition varies among three grassland ecosystems. In arid desert steppe, community biomass is more sensitive to N limitation than the typical steppe and meadow steppe. N addition reduces belowground biomass and R/S ratio in meadow steppe and desert steppe, whereas promotes the values in typical steppe. In contrast, nutrient additions have relatively less and insignificant impacts on the root distribution of temperate grasses. These observations indicate that nutrient addition has different effects on community biomass under different environmental conditions, which means it is necessary to consider the changed response of different grassland ecosystems to nutrient addition in the carbon cycle models budget and grassland management.
中文关键词	养分添加 ; 内蒙古温带草地 ; 地上生物量 ; 地下生物量 ; 根冠比
英文关键词	fertilization Inner Mongolia grassland aboveground biomass belowground biomass R/S ratio
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:5497254
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/2XILL650/232343
作者单位	1.内蒙古大学生命科学学院, 呼和浩特, 内蒙古 010021, 中国; 2.内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010019, 中国; 3.中国农业科学院资源区划所, 北京 100081, 中国
推荐引用方式 GB/T 7714	贺星,马文红,梁存柱,等. 养分添加对内蒙古不同草地生态系统生物量的影响[J]. 内蒙古农业大学,2015,51(4):657-666.
APA	贺星.,马文红.,梁存柱.,红梅.,柴曦.,...&辛晓平.(2015).养分添加对内蒙古不同草地生态系统生物量的影响.北京大学学报. 自然科学版,51(4),657-666.
MLA	贺星,et al."养分添加对内蒙古不同草地生态系统生物量的影响".北京大学学报. 自然科学版 51.4(2015):657-666.