干旱区生态环境知识资源中心(Arid): Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region

Arid

	Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region
其他题名	添加水对半干旱区沙质草地土壤氮有效性季节变化的影响
	Huang XX(黄晓星); Yu ZY(于占源); Qian W(钱伟); Xu DY(徐大勇); Ai GY(艾桂艳)
来源期刊	Journal of Forestry Research
ISSN	1007-662X
出版年	2007
卷号	18 期号:4 页码:287-290
中文摘要	水在半干旱地区的生态系统恢复是个限制因素。针对沙质草地干旱期模拟降水对土壤氮有效性影响的问题,采用田间实验添加水的方法,以地处科尔沁沙地的大青沟沙地生态实验站为平台,研究了2006年生长季沙质草地土壤有效氮含量及净氮矿化速率的季节变化。干旱期添加水(80mm)和对照(CK)处理各重复6次,随机分配在12个4m*4m的样方中,样方之间缓冲带宽2m。根据添加水的实验结果,该沙质草地土壤矿质氮含量与净氮矿化速率并未受添加水的影响;净氮矿化速率变化范围在0.5 mug·g~(-1)·month-1至4 mug·g~(-1)·month~(-1)之间;土壤矿质氮含量与净氮矿化速率最高值出现在10月15日的对照处理中。该沙质草地土壤铵态氮的变化随季节上升,硝态氮随时间逐渐降低,而矿质氮的季节变化格局呈"V"型。
英文摘要	Water is usally thought of a limiting factor for the restoration of semi-arid ecosystem. In the growing season of 2006, a study was conducted to determine the effects of modeling precipitation on seasonal patterns in concentrations of soil-available nitrogen and to describe the seasonal patterns in soil nitrogen availability and seasonal variation in the rates of net nitrogen mineralization of topsoil at Daqinggou ecological station in Keerqin sand lands, Inner Mongolia Autonomous Region, China. Manipulation of water (80 mm) was designed to be added to experiment plots of sandy grasslands in dry season. Water addition (W) treatment and control (CK) treatment were separately taken in six replications and randomly assigned in 12 plots (4 m*4 m for each) with 2-m buffers betweens. Results showed that the content of soil inorganic nitrogen and net nitrogen mineralization rate were not affected by adding water in sandy grassland of Keerqin sand lands. Net ni- trogen mineralization rates ranged from 0.5 mug·g~(-1)·month~(-1) to 4 mug·g-1·month~(-1). The highest values of soil inorganic nitrogen and net nitrogen mineralization occurred on October 15 in control plots. The seasonal changes of soil inorganic nitrogen contents exhibited "V" shape pattern that was related to seasonal patterns of soil ammonium-N (ascending trend) and nitrate-N transformation (descending trend).
中文关键词	氮矿化 ; 矿质氮 ; 草地 ; 科尔沁沙地 ; 硝化作用
英文关键词	Nitrogen mineralization Inorganic nitrogen Grassland Keerqin sand lands Nitrification
类型	Article
语种	英语
国家	中国
收录类别	CSCD
WOS类目	Forestry
WOS研究方向	Forestry
CSCD记录号	CSCD:3134473
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220617
作者单位	黄晓星, 中科院沈阳应用生态研究所大青沟生态站, 沈阳, 辽宁 110016, 中国.; 于占源, 中科院沈阳应用生态研究所大青沟生态站, 沈阳, 辽宁 110016, 中国.; 艾桂艳, 中科院沈阳应用生态研究所大青沟生态站, 沈阳, 辽宁 110016, 中国.; 钱伟, 福建师范大学, 福州, 福建 350007, 中国.; 徐大勇, 同济大学环境科学与工程学院, 上海 200092, 中国.
推荐引用方式 GB/T 7714	Huang XX,Yu ZY,Qian W,et al. Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region[J],2007,18(4):287-290.
APA	黄晓星,于占源,钱伟,徐大勇,&艾桂艳.(2007).Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region.Journal of Forestry Research,18(4),287-290.
MLA	黄晓星,et al."Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region".Journal of Forestry Research 18.4(2007):287-290.