摘要
仁怀市1∶5万尺度耕地质量地球化学调查,是迄今为止针对仁怀市耕地土壤最为全面、系统的专业调查,对表层土壤(5846件)、农产品(95件)等进行取样分析,获取了耕地表层土壤、农产品等的高精度分析数据。结果表明:仁怀市耕地土壤pH平均值为6.61,以酸性为主。与全国A层土壤相比,富集N、Cu、Co、V、F、Se、Cd、Cr、Hg、Ni,贫化Mo、I,其他元素含量相当;与贵州省表层土壤相比,富集K、Cu、F,贫化碱解氮、速效钾、速效磷,其他元素含量相当;从变异系数看,仁怀市元素或指标大部分属于中等变异,仅B、Cd、Hg属于强变异性。仁怀市耕地土壤质量总体情况较好,优质及良好耕地占评价面积的28.6%。富硒耕地面积大,达56.4600万亩,占评价面积的80.7%,优质富硒耕地占比达21.9%。富锗耕地面积为34.5960万亩,占评价面积的49.4%,优质富锗耕地占比达23.4%。采集95件农产品开展安全性及富硒评价,农产品重金属指标均未超过标准下限,红高粱富硒率为52.3%。耕地土壤各组分含量受地质背景、土壤类型及不同土地利用方式等影响,本次调查成果对耕地,特别是特色耕地的规划利用具有重要的意义,并优选出7个适宜发展绿色富硒红高粱的耕地地块。
The 1∶50,000-scale geochemical survey of cultivated land quality in Renhuai is the most comprehensive and systematic professional investigation of cultivated land soil in Renhuai to date.Samples were taken and analyzed from the surface soil(5,846 pieces)and agricultural products(95 pieces),obtaining high-precision analysis data of the surface soil and agricultural products of cultivated land.The results show that the average pH value of cultivated land soil in Renhuai is 6.61,mainly acidic.Compared with the A layer soil of the whole country,it is enriched in N,Cu,Co,V,F,Se,Cd,Cr,Hg,Ni,and depleted in Mo and I,while the content of other elements is comparable.Compared with the surface soil of Guizhou Province,it is enriched in K,Cu,and F,and depleted in available nitrogen,available potassium,and available phosphorus,while the content of other elements is comparable.From the coefficient of variation,most of the elements or indicators in Renhuai belong to moderate variation,only B,Cd,and Hg belong to strong variation.The overall quality of cultivated land soil in Renhuai is good,with high-quality and good-quality cultivated land accounting for 28.6%of the evaluated area.The area of selenium-rich cultivated land is large,reaching 564600 mu,accounting for 80.7%of the evaluated area,and the proportion of high-quality selenium-rich cultivated land is 21.9%.The area of germanium-rich cultivated land is 345960 mu,accounting for 49.4%of the evaluated area,and the proportion of high-quality germanium-rich cultivated land is 23.4%.95 pieces of agricultural products were collected for safety and selenium-rich evaluation.The heavy metal indicators of agricultural products did not exceed the lower limit of the standard,and the selenium-rich rate of red sorghum was 52.3%.The content of each component of cultivated land soil is affected by geological background,soil type,and different land use methods.The results of this investigation are of great significance for the planning and utilization of cultivated land,especially characteristic cultivated land,and seven suitable plots for developing green selenium-rich red sorghum were selected.
作者
陈兴
吴开彬
王军
邓贵标
廖铸敏
刘奎勇
樊洪富
黄建国
CHEN Xing;WU Kai-bin;WANG Jun;DENG Gui-biao;LIAO Zhu-min;LIU Kui-yong;FAN Hong-fu;HUANG Jian-guo(Geologcal Survey of Guizhou,Guiyang 550081,Guizhou,China)
出处
《贵州地质》
2025年第2期245-256,共12页
Guizhou Geology
基金
省级项目“贵州省仁怀市耕地质量地球化学调查评价”(黔地矿耕调2017-28)资助。
关键词
耕地质量
硒
锗
农产品
仁怀市
Cultivated land quality
Selenium
Germanium
Agricultural products
Renhuai
