干旱区生态环境知识资源中心(Arid): 民勤湖区表层土壤养分的空间异质性

Arid

	民勤湖区表层土壤养分的空间异质性
其他题名	Spatial heterogeneity of surface soil nutrients in Minqin lake area
	张凯 1; 冯起2 ; 吕永清 3; 张勃 3; 司建华2 ; 王润元 1
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2013
卷号	31 期号:1 页码:127-132
中文摘要	利用地统计学方法研究了民勤绿洲湖区表层土壤养分碱解氮、速效磷和速效钾的空间异质性。结果表明:绿洲、过渡带和荒漠三种景观下表层土壤中氮磷钾含量都呈现出"丰氮、富钾、贫磷"的特征;碱解氮与速效磷的变异系数在绿洲区最小,荒漠区最大,而速效钾在荒漠区最小,过渡带最大,但都属于中等变异;从绿洲到荒漠,碱解氮、速效磷呈U型分布特征,而速效钾为倒U型分布特征。碱解氮的最佳拟合模型为Exponential,速效磷为PentaspHerical,速效钾为Tetrasherical;氮和磷的富集区位于绿洲区,而速效钾在过渡带上出现富集中心。土壤的养分元素含量除了与成土母质的素有关外,人类活动的影响也是非常重要的因素。
英文摘要	By using the methods of geostatistics, the spatial heterogeneity of available N, available P and available K in surface soils in Minqin lake area was studied. The results indicated that soil N and K were rich but soil P was poor over the three landscapes of oasis, desert and transitional belt. The variation coefficient of soil available N and P was the smallest in oasis area and the biggest in desert area, while that of soil available K was the smallest in desert area and the biggest in oasis-desert transitional belt. Soil nutrients in the study area wholly exhibited moderate spatial variability. The soil available N and P presented a U-shaped distribution pattern, and the soil available K presented an inverse U-shaped distribution pattern from oasis to desert. Available N, P and K fitted well to Exponential model, PentaspHerical model and Tetrasherical model, respectively. The enriched zone of available N and P was located in oasis area, whereas that of available K was located in oasis-desert transitional belt. The soil nutrient contents were related not only to the elements of parent rocks, but also to the impact of human activities.
中文关键词	表层土壤 ; 养分 ; 空间异质性 ; 地统计学 ; 民勤湖区
英文关键词	surface soil nutrient spatial heterogeneity geostatistics Minqin lake area
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:4752220
来源机构	中国科学院西北生态环境资源研究院 ; 西北师范大学 ; 中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229468
作者单位	1.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 3.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	张凯,冯起,吕永清,等. 民勤湖区表层土壤养分的空间异质性[J]. 中国科学院西北生态环境资源研究院, 西北师范大学, 中国气象局兰州干旱气象研究所,2013,31(1):127-132.
APA	张凯,冯起,吕永清,张勃,司建华,&王润元.(2013).民勤湖区表层土壤养分的空间异质性.干旱地区农业研究,31(1),127-132.
MLA	张凯,et al."民勤湖区表层土壤养分的空间异质性".干旱地区农业研究 31.1(2013):127-132.