土壤氮磷钾与镉空间分布及其相关性研究
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作者单位:

(1.西南科技大学城市学院,四川 绵阳 621000;2.成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都 610000)

作者简介:

于平 (1992-),男,山西朔州人,硕士,研究方向为土壤污染及改良。E-mail:zeropingyu@163.com。

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基金项目:

基金项目:国家自然科学基金资助项目 (41572302);西南科技大学城市学院校级科研项目(2019XJXM43)。


Spatial distribution and correlation of soil available potassium,nitrogen,phosphorus and cadmium
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Affiliation:

(1.CityCollege,Southwest University of Science andTechnology,Sichuan Mianyang621000;2.State Key Laboratory of Geohazard Prevention and GeoenvironmentProtection,Chengdu University of Technology, Chengdu Sichuan610000)

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    摘要:

    土壤氮磷钾及镉的空间分布及其相关性研究对正确有效地实施精准农业具有重要的意义。为揭示西南地区土壤氮磷钾与镉的空间相关性规律,以三台县耕地区的土壤为研究对象,结合经典统计学和地统计学方法,研究 0~ 50 cm土层土壤碱解氮(AN)、有效磷(AP)、速效钾(AK)与镉(Cd)的空间分布特征及其相关性,在此基础上借助反距离加权法(IDW)和 Person相关性分析等方法对土壤 AN、AP、AK与 Cd的相关性进行分析,主要成果:研究区内 AN、AP、AK含量随深度增加逐渐减小,且均属于中等变异。Cd随深度有减小趋势,且 Cd含量在 0~ 30 cm深度范围内较高,为 0.16~ 0.31mg/kg,高于背景值 0.079mg/kg。土壤AN、AP、AK与 Cd含量在空间上具有相关性且符合一元二次方程。主要表现为 AN和 AK会促进 Cd的累积并抑制作物对 Cd的吸收,从而导致土壤中 Cd含量升高,AN和 AK含量越高,效果越显著,而 AP会促进作物对 Cd的吸收,导致土壤中的

    Abstract:

    The spatial distribution and correlation of soilN,P,K and Cd had important significance for the correct and effective implementation of precision agriculture.In order to reveal the spatial correlation between soil nitrogen,phosphorus,potassium and cadmium in southwestChina,and the spatial distribution and correlation of alkaline nitrogen(AN),available phosphorus(AP),available potassium(AK)and cadmium(Cd)in 0~ 50 cm soil layer werestudied,taking the cultivated soil of Santai County as the research object,combining classical statistical and geostatisticalmethods.The correlation between soilAN,AP,AK and Cd was analyzed by IDW and Pearson correlationanalysis.Themain results were as follows:the contents ofAN,AP and AK in the study area decreased withdepth,and all of thembelonged to moderatevariation.Cd decreased withdepth,and the content of Cd was higher in the depth range of 0~ 30cm,which was 0.16~ 0.31mg/kg,and it was higher than the background value of 0.079mg/kg.The contents of soilAN,AP,AK and Cd were spatially related and conform to the one -variable quadraticequation.The main performance was thatAN and AK could promote the accumulation of Cd and inhibit the absorption of Cd bycrop,which can lead to an increase insoil Cdcontent.The higher the content of AN andAK,the more significant theeffect,and AP can promote the absorptionof Cd by thecrop,leading Cd content in the soil being reduced.

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于平,王梓龙,盛杰,蒋超.土壤氮磷钾与镉空间分布及其相关性研究[J].中国土壤与肥料,2020,(5):17-25.

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  • 收稿日期:2019-09-09
  • 最后修改日期:
  • 录用日期:2020-01-19
  • 在线发布日期: 2020-11-06