王玉军,欧名豪.徐州农田土壤养分和重金属含量与分布研究[J].土壤学报,2017,54(6):1438-1450. WANG Yujun,OU Minghao.Contents and Distribution of Soil Nutrients and Heavy Metal Elements in Farmlands of Xuzhou[J].Acta Pedologica Sinica,2017,54(6):1438-1450 本文二维码信息
二维码(扫一下试试看!)
徐州农田土壤养分和重金属含量与分布研究
Contents and Distribution of Soil Nutrients and Heavy Metal Elements in Farmlands of Xuzhou
投稿时间:2017-07-28  修订日期:2017-08-18
DOI:10.11766/trxb201707280331
中文关键词:  土壤养分  重金属元素  耕层土壤  空间分布  土壤类型  农田类型
Key Words:Soil nutrients  Heavy metal elements  Plough layer soil  Spatial distribution  Soil type  Farmland type
基金项目:国家自然科学基金项目(40873081)和江苏省地质勘查基金项目“徐州城市地质调查”资助
作者单位E-mail
王玉军 南京农业大学公共管理学院 103729590@qq.com 
欧名豪 南京农业大学公共管理学院 mhou@njau.edu.cn 
摘要点击次数: 420
全文下载次数: 308
中文摘要:
      测定分析了江苏省徐州市9 232个农田土壤耕层样品的养分含量和重金属含量,并综合运用GIS空间分析与统计方法研究了土壤大量养分(全氮(TN)、全磷(TP)、全钾(TK)、碱解氮(AN)、有效磷(AP)和速效钾(AK))、微量养分全量(硼(B)、锰(Mn)、钼(Mo))和重金属全量(砷(As)、镉(Cd)、铬(Cr)、铜(Cu)、汞(Hg)、镍(Ni)、铅(Pb)、锌(Zn))的统计特征、空间分布特征及其在不同土壤类型和农田类型中的分布差异。结果表明,徐州农田耕层土壤中的养分和重金属元素含量总体高于江苏和全国平均值,养分含量达中等水平以上的面积比例超过80%,99%以上的农田土壤重金属元素含量为清洁或尚清洁。养分含量偏高与徐州农田耕作程度较高有关,重金属元素含量超标与工矿业生产有关。养分和重金属元素含量在空间分布上有较大分异,不同成因的土壤类型和不同农田类型的养分和重金属元素含量差异明显。
Abstract:
      【Objective】Xuzhou is a city with economy based mainly on traditional agriculture and mining. In order to get to know soil fertility and pollution of the farmland soil of the city and provide references for fertilization, pollution control and agricultural layout in the region, a total of 9 232 soil samples were collected from plough layers of the farmlands in Xuzhou for analysis of 17 indices, including total nitrogen (TN), total phosphorus (TP), total potassium (TK), alkalyzable nitrogen (AN), available phosphorus (AP), readily available potassium (AK), B, Mo, Mn and heavy metal elements, such as As, Cd, Cr, Cu, Hg, Ni, Pb and Zn. 【Method】TN was measured with the volumetric method; TP, TK, Mn, Cr, Cu, Ni, Pb and Zn, with the x-ray fluorescent spectroscopy; Mo and Cd, with the inductively coupled plasma mass spectrometry; As and Hg, with the atomic fluorescence spectrometry; B, with the emission spectrometry; AN, with the sodium hydroxide solution diffusion-volumetric method; AK, with the ammonium acetate solution leaching-atomic absorption spectrometry; and AP, with the ammonium bifluoride and hydrochloride leaching- inductively coupled plasma atomic emission spectrometry in acid soils and with the sodium bicarbonate solution leaching-spectrophotometry in alkaline soils. Descriptive statistics was performed with the helo of the IBM Statistics SPSS 20.0 software and Kriging interpolation, spatial analysis and geo-statistics with the aid of the ESRI ArcGIS 9.3. Soil nutrient contents were graded according to DZ/T 0295-2016 and soil heavy metal contents, using the Nemerow index. 【Result】The descriptive statistics showed that the average contents of soil nutrients in Xuzhou were higher than those in Jiangsu and China, while the average contents of heavy metal elements were higher than those in Jiangsu and China, and than the background values of Xuzhou, too. The variation coefficients of AP, AK, Mo and Hg were higher than those of the other elements, which indicated high variability between soil samples. Over 80% of the farmlands were rated as moderate or higher in soil nutrient content, while over 99% of the farmlands were sorted into the category of clean or safe soils. Farmlands lightly polluted by As, Cd, Cu or Ni were very limited in area. The higher soil nutrient contents may be attributed to long-term farming cultivation and application of organic manure, meanwhile, the higher heavy metal contents may come from mining and smelting of coal, iron and copper and relevant industries, as well, like thermal power. All the soil indices exhibited significant characteristics in spatial distribution and their spatial correlations with soil types and farmland types. Spatial distributions of TN, TP, TK, AN, AP and AK contents were apparently quite similar, but those of AN, AP and AK varied sharply, while those of B, Mo and Mn did even more. The distribution of heavy metal elements in farmland soils exhibited a declining trend from north to south. The sharp spatial variation of soils in composition was mainly related to soil type and farmland type. Soils derived from lacustrine sediments were higher than those from hill slope sediments and from river alluvium in nutrient content and heavy metals content, and paddy soils higher than dryland soils and garden soils, too. Besides, landform was also an important influencing factor. 【Conclusion】The average contents of soil nutrients and heavy metal elements in the farmlands of Xuzhou are generally higher than those of Jiangsu and China and than the background values, too. Over 80% of the farmland soils in Xuzhou can be rated moderate or higher in nutrient content level while merely less than 1% is polluted by heavy metal elements. The main factors influencing contents and distribution of soil nutrients and heavy metal elements include soil type, soil parent material, landform tillage, fertilization, as well as mining and industries.
查看全文  查看/发表评论  下载PDF阅读器