干旱区生态环境知识资源中心(Arid): 甘肃省灌漠土土壤养分空间变异特征

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	甘肃省灌漠土土壤养分空间变异特征
其他题名	Spatial fertility variability of irrigated desert soil in Hexi Region of Gansu province
	赵良菊 1; 肖洪浪1 ; 郭天文 2; 包兴国 2; 杨文玉 2
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2005
卷号	23 期号:1 页码:70-74,102
中文摘要	结合传统统计与地质统计学方法对甘肃省河西地区武威灌漠土有机质、NH4+-N、有效P及K的空间变异性进行了分析.结果表明:所测定的四种土壤养分含量具有较大的空间变异,变异系数在20.299%～53.812%之间,土壤NH4+-N及有效P含量的变异较大,变异系数分别为53.812%及51.347%;土壤K和有机质的变异系数分别为43.155%和20.299%.地质统计学分析表明该区域土壤P、K有效含量具有强烈的空间相关性,其块金值/基台值[C0/(C0+C)]分别为8.031%和0.560%;土壤NH4+-N及有机质具有中等程度的空间相关性,[C0/(C0+C)]分别为39.111%和32.351%.土壤有机质、NH4+-N、速效P及K等含量的最大相关距在129～2 354 m之间,其中土壤有效N含量的最大相关距最长(2 354 m),有机质含量次之(981 m),K含量最短(129 m).土壤OM及NH4+-N的分形维数分别为1.891和1.912,土壤有效P及K的分形维数均为1.984.随机因素如种植制度、施肥方式等耕作措施对土壤有机质及氮的影响较大,而对土壤磷、钾的影响较小.该土壤性质的克立格插值结果显示出一定的空间相似性,显示地质统计学方法可用于分析土壤肥力在空间上的变异.
英文摘要	On the basis of mathemtical statistics and geo-statistics methods, the spatial variability of contents of soil Organic Matter, NH_4~+-N, available P and K were analysized in Wuwei irrigated desert soil in Hexi region of Gansu Province. The results showed that the spatial variabilities of the tested soil properties were sharp, and CV of those soil properties varied from 20. 299% to 53. 812%, and NH_4~+-N and available P were high and their CV were 53. 812% and 51. 347%, respectively; The CV of OM and available K were 43. 155% and 20. 299%. The results of geostatistical analysis revealed that the contents of P and K had strong spatial variability and their nugget-sill ratios were 8. 031% and 0. 560%, respective-ly. The spatial dependences of soil NH_4~+ ~N and OM are moderate. The ranges of soil OM, NH_4~+ - N, available P and K were 981 m, 2 354 m, 207 m and 129 m, respectively. The fractal demisions of soil OM and NH_4~+-N were 1. 891 and 1. 912, respectively, and the fractal demisions of soil available P and K were all 1. 984. Namely, the spatial variabilities of soil OM and NH_4~+-N were strong and soil available P and K were weak. The results of Kriging showed that to some extend soil nutrients had spatial dependence and geostatistics method was able to be used to analyze the spatial variability of soil nutrients.
中文关键词	灌漠土 ; 土壤养分 ; 空间变异性 ; 地质统计学
英文关键词	spatial variability irrigated desert soil soil nutrients geostatistics
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:1866298
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206095
作者单位	1.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730000, 中国; 2.甘肃省农业科学院土壤肥料研究所, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	赵良菊,肖洪浪,郭天文,等. 甘肃省灌漠土土壤养分空间变异特征[J]. 中国科学院西北生态环境资源研究院,2005,23(1):70-74,102.
APA	赵良菊,肖洪浪,郭天文,包兴国,&杨文玉.(2005).甘肃省灌漠土土壤养分空间变异特征.干旱地区农业研究,23(1),70-74,102.
MLA	赵良菊,et al."甘肃省灌漠土土壤养分空间变异特征".干旱地区农业研究 23.1(2005):70-74,102.