阜阳市东南部土壤地球化学特征及土壤质量评价

通过1∶250 000多目标区域地球化学调查、采样和化验,获得了阜阳市东南部地区表层、深层土壤中22项指标的土壤地球化学背景值、基准值等数据,研究其分布特征,并依据相应规范进行土壤质量评价。结果显示,与邻区(淮北-亳州)土壤基准值相比,N、Mn、I、Cr等8种元素(指标)土壤基准值略高,而P、MgO、S、Cd等8种元素(指标)则低于邻区;N、Corg和Mn土壤背景值高于邻区的土壤背景值;而P、CaO、MgO、S等8种元素(指标)土壤背景值低于邻区。土壤养分主要处于中等水平、土壤环境质量以清洁为主,仅存在少量轻微污染土壤,影响土壤环境的地球化学指标主要为Cd。区内土壤质量综合评价以优质等级为主,约占研究区总面积的76.33%;其次为良好等级,占研究区总面积的23.67%,就此提出了土地资源分质利用的建议。

Soil geochemical characteristics and evaluation of soil quality in Southeast of Fuyang City

Thro ug h the geochemical surv ey and the sampling o f 1B 250 000 tar get areas, the soil g eochemica l backg round v alues and refer ence values of 22 indicators in surface and deep soils w ere obtained to study the distributio n characteristics in the so utheastern part o f Fuyang City. Soil qualit y ev aluatio n was calculated according to the corresponding specificatio ns. The re2 sults show ed that the so il reference v alues o f 8 elements ( indicators) such as N, Mn, I and Cr w ere slightly hig her, w hile 8 ele2 ments such as P, M gO, S and Cd ( indicato rs) w ere lower com par ed with the so il r eference va lue o f the neighboring area ( H uai2 bei2Bozho u) . T he soil backg ro und values of N, Co rg , and Mn wer e hig her than those of the adjacent ar ea. T he so il backg ro und values of 8 elements ( indicato rs) such as P, CaO, MgO and S wer e low er than the adjacent ar eas. Soil nutrients wer e mainly at a medium level, w hile the soil env iro nmental quality was clean and only a small amo unt o f slig ht ly polluted soil ex isted in t he stud2 y area. The g eochemical index w hich affect ing the soil env iro nment w as Cd. T he comprehensive evaluat ion of so il quality in the area w as high quality g rade, accounting fo r 761 33% of the to tal area in the study area, followed by g oo d g rade, accounting for 231 67% of the to tal ar ea o f the study a rea. Therefor e, the sugg estions o n the qualit at ive utilizatio n of land resources wer e put forw ar d.