title: [Spatial variability of farmland soil nutrients at Taihang piedmont].
abstract: By the method of geostatistics, this paper studied the spatial variability of soil nutrients in 30,490 hm2 crop field in Luancheng region and in 15 hm2 experimental field in Luancheng Ecological Agriculture Station of Chinese Academy of Sciences. The results showed that the variation of soil nutrient contents differed obviously, and the semivariograms could be simulated by Gaussian and spherical models with some nugget variances. The limit distance of spatial correlation was 4.2-15.6 km and 112-223 m in Luancheng region and in experimental field, respectively, and the spatial variability of soil organic matter, N, P and K was of semivariance structure. It revealed that there existed a spatial correlation in soil nutrient contents under relatively large-block scale, which made it possible to develop regionalized soil nutrient precision management.
authors.affiliation: Institute of Genetics and Developmental Biology Chinese Academy of Sciences, Shijiazhuang 050021, China. ymzhang@ms.sjziam.ac.cn
authors.forename: Yuming
authors.initials: Y
authors.lastname: Zhang
authors.forename: Renzhao
authors.initials: R
authors.lastname: Mao
authors.forename: Chunsheng
authors.initials: C
authors.lastname: Hu
authors.forename: Jiabao
authors.initials: J
authors.lastname: Zhang
authors.forename: Anning
authors.initials: A
authors.lastname: Zhu
mesh_terms: D002681:China; D018556:Crops, Agricultural / Q000254:growth & development; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D011188:Potassium / Q000032:analysis; D012987:Soil / Q000032:analysis*; D014908:Triticum / Q000254:growth & development*
chemical_list: D012987:Soil; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium