6期 座速东等：不同取释阀距农田土壤全量养分空间变异特征研究 1065 Spatial V ariability of TotalNutrients in Arable Soil as affected by Different Sam pling Distances HENG Jian-dong X AO Hua.WU H ong-qi.CHEN Bing,WANG Jun YANG X in-jian,TAN Jian-hua,YANG shuo Q AN W en-dong,YANG Yan 1.Collige of Resouree and Enrrorm mnl Scimees X injiang Agriculaml Un irersin.Unm gi 830052 Chinc 2Agrialral College,ShheiUnineri.Shhei 8003 Ching 311 rgin f Shhei city in Xi训aag.S动hai32066Chic 4.Collere of Rexouatce and Enringmn ent Chia agticulsualUniesin.Beiiing 100094 Chin) Abstract The spatial variabiliy of ount ofN.P and organicmatter in arbe oilwas sudied at three smpling distances i e 100 meter 50 meter and 25 meter The results ind icated that the contents of otalN and soil organic matter were bw,and total he P content wasm edim.The coefficient of variatin of otal N changed in relatively sm all extent at dfferent samplng distance but that of ogan ic matter and total P was reduced w ith increasing smpling distance The reasonable smpling numbers for soil organ icmatter totalN and total P were 24 34 and 10 respectively The soil depth prfile as the ading factor to nfluence the patial variability of soil al nutrins whik th effect of random factor w asw eak The nfluence of samp Ing distance on the satial variability of soil lotal nutrientsw as not evilent The samplng distance of 100 meters coul be appropriate to study the total nutrints of cultivated soil n aril areas precisely Key words Distance of Sampling TotalNutin SpatialV ariability 1994-2011 China Academic Journal Electronie Publishing House.All rights reserved.http://www.enki.netSpatial Variability of Total Nutrients in Arable Soil as affected by Different Sam pling Distances SHENG Jian- dong 1, 4 , X IAO Hua 2 , WU H ong- qi 1 , CHEN B ing 1 , WANG Jun 3 , YANG X in- jian 3 , TIAN Jian- hua 3 , YANG shuo 3 , Q IAN W en- dong 3 , YANG Yan 3 ( 1
Colleg e of R esource and Environm en ta l S ciences, X injiang Ag ricultura l Un iversity, Urum qi 830052, Ch ina; 2
Ag ricu ltral C ollege, Sh ih ezi University , Sh ihezi 832003, Ch ina; 3
121 reg ion of Sh ih ezi city in X inJ iang , Sh ih ezi, 832066, Ch ina; 4
Colleg e of R esource and Environm en t, Ch ina Agricultura l Un iversity, B eijing, 100094, Ch ina ) Abstract: The spatia l variability of tota l amount ofN, P and organ icmatter in arable so ilw as studied at three sampling distances, i
e
100 meter, 50 meter and 25 meter. The results ind icated that the contents of tota l N and so il organic matter w ere low, and to tal the P content w as m edium. The coeffic ient of variation of to tal N changed in relative ly sm all ex tent at dfferent samp ling d istance, but that of organ ic ma tter and to tal P was reduced w ith increasing sampling distance. The reasonable sampling numbers for so il organ icmatter, to ta lN and total P w ere 24, 34 and 10 respectively. The so il depth profile structurew as the lead ing factor to influence the spatial variability of so il to tal nutrients, wh ile the effect of random factorw asw eak. The influence of samp ling distance on the spatial variab ility o f so il total nutrientsw as not ev iden.t The sampling d istance of 100 m eters could be appropriate to study the total nutrients of cultivated so il in arid areas precisely. K ey words: D istance of Sampling; Tota lNutrien;t SpatialV ariability 6期 盛建东等: 不同取样间距农田土壤全量养分空间变异特征研究 1065