| 豫中典型烟田土壤养分空间变异特征分析 |
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| 引用本文： | 李新爱,刘国顺,王新中,张正杨.豫中典型烟田土壤养分空间变异特征分析[J].宁夏农林科技,2014(1):40-43. |
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| 作者姓名： | 李新爱 刘国顺 王新中 张正杨 |
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| 作者单位： | [1]大理学院,云南大理671000 [2]河南农业大学,河南郑州450002 [3]云南省烟草公司大理州公司,云南大理671000 |
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| 基金项目： | 国家烟草专卖局项目（110200401021） |
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| 摘 要： | 利用地统计学方法研究了豫中植烟土壤有机质、全氮、速效磷和速效钾的空间变异规律。结果表明:4种土壤养分的空间结构模型均符合球状模型;土壤全氮的块金值/基台值25%,表现出强烈的空间相关性;有机质、速效磷和速效钾的块金值/基台值在30%~46%,表现出中等强度的空间相关性,空间自相关距离在274~556 m。利用Kriging法生成土壤有机质、全氮、速效磷和速效钾的空间分布图,为研究区域开展精准施肥提供了决策参考。
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| 关 键 词： | 烟田 土壤养分 空间变异 地统计学 |
Spatial Variability of Soil Nutrients in Tobacco Planting Fields of Central Henan |
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| Institution: | LI Xin-ai et al. (Dali University, Dali, Yunnan 671000) |
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| Abstract: | Spatial variability of soil organic matter （OM）, total nitrogen （TN）, available phosphorus （AP） and available potassium （AK） in tobacco planting soils were studied using geostatistics in central Henan. Results showed that soil TN had strong spatial dependence, with nugget/sill ratios 〈25%. Soil OM, AP and AK had moderate spatial dependence, with nugget/sill ratios ranging form 30% to 46%. All of the four soil nutrients could be fitted well with the spherical models and the ranges of spatial dependence varied from 274 m to 556 m. Kriging method was used to generate spatial distribution maps of soil nutrients, which provided theoretical basis for precision fertilizers application of flue-cured tobacco in studied region. |
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| Keywords: | Tobacco field Soil nutrients Spatial variability Geostatistics |
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