干旱区生态环境知识资源中心(Arid): 塔里木河上游荒漠河岸林土壤速效氮空间变异性研究

Arid

	塔里木河上游荒漠河岸林土壤速效氮空间变异性研究
其他题名	Study on Soil Available Nitrogen Spatial Variation of Desert Riparian Forest in the Tarim River Upstream
	王家强 1; 柳维扬 1; 彭杰 1; 韩路 2; 于军 2; 徐小强 1
来源期刊	中国农学通报
ISSN	1000-6850
出版年	2014
卷号	30 期号:1 页码:52-57
中文摘要	为了对塔里木河上游流域三源交汇区荒漠河岸林土壤氮素空间变异特征进行研究,通过采集测定研究区内不同层次土壤样品的速效氮,并利用GIS、统计学与地统计学的方法,对研究区内土壤速效氮的空间异质性进行分析。结果表明:荒漠河岸林0~20 cm、20 - 40 cm、40 - 60 cm土层的土壤速效氮变异系数均属于中等变异,变异系数的大小与土壤深度有关,20~40 cm、40~60 cm土壤的变异系数大于0~20 cm土层;采样数量从精确性、经济性、采样效率3个方面分析,确定了合理的采样数量为0~20 cm土层的采样数为15个,20~40 cm土层的采样数为24个,40~60 cm土层的采样数为24个;0~20 cm土层土壤速效氮具有中等空间相关性,主要由随机因素与结构因素共同作用的结果;20 - 40 cm、40~60 cm土层土壤速效氮具有弱空间相关性,主要是随机因素作用的结果;林区土壤速效氮的空间分布表现为0~20 cm土层中部含量相对较高,空间分布呈现出明显的片状和斑块状分布特点,土壤速效氮含量在20~40 cm土层由南至北依次呈现由高到低,空间范围内呈现出一致性的块状分布;土壤速效氮含量在40~60 cm在空间范围内,由西北至东南依次呈现由高到低的斜条状分布;此研究为区域生态系统的恢复与重建提供理论依据。
英文摘要	By using GIS, traditional descriptive statistics and geo-statistics, the author studied the spatial distribution characteristics and impact factors of soil available nitrogen (AN) content of desert riparian forests in upstream of Tarim River. The results indicated that: the spatial variability of soil AN content was moderate. The coefficient of variation was correlated with the depth of soil. The variation coefficient of 20-40 cm and 40-60 cm soil was greater than that of 0-20 cm soil. The numbers of soil samples were analyzed based on accuracy, economy and efficiency. The reasonable numbers of samples were 15, 24 and 24 for 0 - 20 cm, 20-40 cm and 40-60 cm soil layers respectively. Spatial correlation of 0-20 cm soil layer soil AN was medium, Random factors and structure factors were common reasons to arouse the spatial variation of soil AN content. The spatial autocorrelations of soil AN content in the 20-40 cm and 40-60 cm soil layers were slight, random factors were main reasons. Spatial distribution of 0-20 cm soil layer AN was relatively high in central content, the spatial distribution presented the obvious flake and plaque distribution characteristics. 20-40 cm soil layer AN content was gradually reduce from south to north, presented obvious block distribution. 40-60 cm soil layer AN content was gradually reduce from northwest to southeast, presented oblique strip distribution. The study provided theoretical basis for regional ecological system recovery and reconstruction.
中文关键词	荒漠河岸林 ; 土壤速效氮 ; 空间变异
英文关键词	desert riparian forest soil available nitrogen spatial variability
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:5055740
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232078
作者单位	1.塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国; 2.塔里木大学植物科学学院, 新疆生产建设兵团塔里木盆地物资源保护与利用重点实验室, 阿拉尔, 新疆 843300, 中国
推荐引用方式 GB/T 7714	王家强,柳维扬,彭杰,等. 塔里木河上游荒漠河岸林土壤速效氮空间变异性研究[J],2014,30(1):52-57.
APA	王家强,柳维扬,彭杰,韩路,于军,&徐小强.(2014).塔里木河上游荒漠河岸林土壤速效氮空间变异性研究.中国农学通报,30(1),52-57.
MLA	王家强,et al."塔里木河上游荒漠河岸林土壤速效氮空间变异性研究".中国农学通报 30.1(2014):52-57.