摘 要：
[目的]研究甜瓜种植区根系土的生态地球化学特征和立地地球化学条件,评价河套地区土壤环境质量,为该地区甜瓜种植提供科学依据。[方法]采集河套地区甜瓜主要种植区根系土样品和犁底层样品并分析其中的重金属元素含量,通过与《土壤环境质量标准》(GB15618-1995)对比,确定根系土中重金属元素是否符合国家标准。[结果]根系土中重金属元素在黄河退水区含量最高,盐土次之,栗褐土中最小。后套地区中上游灌淤土中有害元素As、Cd、Hg、F、Pb在地表根系土表现为富集特征,垂直方向上具有一定的分带性;微量元素Cu、Zn,有益元素P、K_2O、Ca O、Mg O、Se表现为贫化;在黄河退水区乌梁素海一带灌淤土中,有害元素As、Cd在地表根系土中明显富集,其他元素贫化或接近背景值;在犁底层土壤中,无论是有益组分还是有害组分均呈富集特征。[结论]河套地区立地地球化学条件优秀,种植的甜瓜重金属元素符合国家食品卫生标准。
译 名：
Eco-geochemical Characteristics of Muskmelon Root Soil in Planting Region of Hetao Irrigation Area of Inner Mongolia
作 者：
PENG Zhi-fan;Inner Mongolia Geological Environment Monitoring;
关键词：
Root system soil;;Anthropogenic-alluvial soil;;Saline soil;;Eco-geochemical characteristics
摘 要：
[Objective] To evaluate the eco-geochemical characteristics and geochemistry conditions of root soil in muskmelon planting area,to evaluate the soil environment quality in Hetao Irrigation Area,and to provide scientific basis for the muskmelon planting in this area. [Method]root system soil sample and plow pan sample were collected from the main muskmelon planting area in Hetao Irrigation Area,so as to analyze the contents of heavy metal elements. By comparing with the Soil Environmental Quality Standard( GB15618- 1995),we determined whether the heavy metal elements in root system accorded with national standard. [Result]Heavy metal elements in root system soil had the maximum content in recession flow area of Yellow River,followed with saline soil. The content of heavy metal elements in chestnut-brown soil was the minimum. Harmful elements As,Cd,Hg,F and Pb in anthropogenic-alluvial soil of upper and middle reaches of Hetao Irrigation Area showed enrichment characteristics in earth surface,with a certain zonation in vertical direction. Trace elements Cu and Zn and beneficial elements P,K_2 O,Ca O,Mg O and Se showed depletion. In anthropogenic-alluvial soil of Ulansuhai Nu recession flow area of Yellow River,harmful elements As and Cd showed significant enrichment in root system soil of earth surface; while other elements showed depletion or was nearly background value. In soil of plow pan,both beneficial component and harmful component showed enrichment characteristics. [Conclusion] Hetao Irrigation Area has idea geochemical conditions; and the heavy metal elements in muskmelon planted in this area accord with the standard of national food and health standard.
