干旱区生态环境知识资源中心(Arid): 水氮控制对荒漠草原中小型土壤动物的影响

Arid

	水氮控制对荒漠草原中小型土壤动物的影响
其他题名	Effects of water and nitrogen control on soil meso- and micro-fauna communities in desert steppe
	叶贺 1; 红梅 2; 赵巴音那木拉 2; 霍利霞 1; 高海燕 1
来源期刊	中国环境科学
ISSN	1000-6923
出版年	2018
卷号	38 期号:11 页码:4325-4333
中文摘要	为了解模拟氮沉降和降雨变化对短花针茅荒漠草原中小型土壤动物的影响,本试验设计主区为自然降雨(CK)、增雨30%(W)和减雨30%(R)3个水分处理,副区为0(N0),30(N30),50(N50)和100(N100)kg/(hm~2·a)4个氮素处理共12个处理.研究表明:在相同的水分处理中随着氮浓度的不断增高,表层土壤中中小型土壤动物的个体密度呈先上升后下降趋势.W-N30处理下中小型土壤动物个体密度高于其他处理(P<0.05),类群数随着氮浓度升高呈下降趋势,减雨与过量施氮对表层土壤中中小型土壤动物个体密度具有抑制作用.短花针茅荒漠草原中小型土壤动物在土层中具有明显的表聚特性.另外,冗余分析(RDA)表明,研究区内中小型土壤动物的优势类群与常见类群受环境因子影响较显著,土壤pH值、温度、含水量、有机质和植物全C、全N、 C/N对中小型土壤动物个体密度影响均较大,但短期内对类群数的影响不显著.当短花针茅荒漠草原面临全球变化时,随着氮沉降量逐渐增加,表层土壤中中小型土壤动物个体密度先逐渐增加,当达到不同水分条件下氮浓度阈值时,则对表层土壤中中小型土壤动物产生抑制作用.
英文摘要	An experiment with split-plot design which is water treatment as (3 levels: natural rainfall, increasing 30% of rainfall, and decreasing 30% of rainfall ) main treatment and nitrogen treatments(4 nitrogen levels: 0(N0), 30(N30), 50(N50) and 100(N100)kg/(hm~2·a) as sub-region in Stipa breviflora desert steppe, was conducted to understand the effects of simulated nitrogen deposition and rainfall changes on soil meso- and micro-fauna communities. Our results showed that soil fauna individual density in the surface soil was increased at first and then was decreased with nitrogen concentration increase in same water treatment.Soil meso- and micro-fauna communities individual density in W-N30treatment was significantly higher than that in other treatments (P<0.05), and group number decreased with nitrogen concentration. Rainfall reduction and excessive nitrogen application decreased the individual density of soil meso- and micro-fauna communities in the surface soil. Soil meso- and micro-fauna individual of the surface in Stipa breviflora desert steppe was significantly higher than that of subsurface soil. In addition, redundant analysis (RDA) showed the most obvious responsive to environmental factors soil fauna was the dominant and common groups in the study area.Soil meso- and micro-fauna communities individual density, rather than group number, was greatly influenced by soil pH, temperature, water content, organic matter and total C, total N and C/N ratio in short period. Soil fauna individual density in surface soil increased with nitrogen deposition increased under future projected climate change. However, soil fauna communities in surface soil were restricted when nitrogen reached threshold under different conditions.
中文关键词	荒漠草原 ; 氮沉降 ; 降水变化 ; 中小型土壤动物
英文关键词	desert steppe nitrogen deposition precipitation change soil meso- and micro-fauna communities
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6371923
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/2XILL650/238680
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 010011, 中国; 2.内蒙古农业大学草原与资源环境学院;;内蒙古自治区土壤质量与养分资源重点实验室, ;;内蒙古自治区土壤质量与养分资源重点实验室, 呼和浩特;;呼和浩特, 内蒙古;;内蒙古 010011;;010011, 中国
推荐引用方式 GB/T 7714	叶贺,红梅,赵巴音那木拉,等. 水氮控制对荒漠草原中小型土壤动物的影响[J]. 内蒙古农业大学,2018,38(11):4325-4333.
APA	叶贺,红梅,赵巴音那木拉,霍利霞,&高海燕.(2018).水氮控制对荒漠草原中小型土壤动物的影响.中国环境科学,38(11),4325-4333.
MLA	叶贺,et al."水氮控制对荒漠草原中小型土壤动物的影响".中国环境科学 38.11(2018):4325-4333.