中国水稻科学

中国水稻科学

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水网平原稻田土壤养分空间变异特性研究

姜丽娜; 符建荣; 范浩定   

  1. 1浙江省农业科学院 环境资源与土壤肥料研究所, 浙江 杭州 310021; E-mail: jln@mail.hz.zj.cn； 2 浙江省绍兴市农业技术推广总站, 浙江 绍兴312000
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-03-10 发布日期:2005-03-10

Spatial Variance Characteristics of Paddy Soil Nutrients in Alluvial Plain

JIANG Li-na , FU Jian-rong , FAN Hao-ding
  

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-03-10 Published:2005-03-10

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被引次数

79

摘要： 通过对绍兴独树养分监测村土壤10种养分元素空间变异性的研究，明确了水网平原水稻土养分空间变异规律。各向同性球型、指数型半方差函数较好地描述了土壤养分变异与空间距离的关系，该村土壤N、P、K、Mn、Fe等5种养分具有中等的空间相关性， Ca、Mg、S、Cu、Zn等5种养分具有高度的空间相关性。进一步用各向异性变异模型分析土壤养分空间变异，表明土壤Ca、Mg、K、Cu存在一定的带状异质性。经不同采样距离下Kriging内插十字交叉验证，明确可用土壤养分空间相关距离确定方格取样法确定最大取样距离。

关键词: 土壤养分, 地统计学, 空间变异, 最大允许采样距离, 水稻土, 精准养分管理

Abstract: Spatial variations of ten kinds of soil nutrients and soil pH value were studied at Dushu nutrient monitoring village in Shaoxing City, Zhejiang Province, which was located on alluvial plain, and the characteristics of spatial variance were obtained from geostatistic analysis on soil nutrients. Relationship of soil nutrients between semivariance and distance of sampling points were well described by spherical isotropic model and exponential isotropic model. For the nutrients, there existed middle spatial correlation in soil N, P, K, Mn and Fe contents, while that in soil Ca, Mg, S, Cu and Zn contents was high. The nutrients Ca, Mg, K and Cu appeared some zonal anisotropy. From the test of cross validation (Kriging) under different sampling distance, maximal sampling distance of square sampling method could be determined by effective range of soil nutrients.

Key words: soil nutrient, geostatistics, spatial variance, maximal sampling distance, paddy soil, precise nutrient management