山西省谷子主栽区土壤和谷子硒赋存状况分析  

Analysis of Soil and Millet Selenium Enrichment in Millet Planting Area of Shanxi Province

作　　者：刘洋[1] 李廷亮[1,2,3] 栗丽 张晋丰[1] 陈婷 LIU Yang;LI Tingliang;LI Li;ZHANG Jinfeng;CHEN Ting(College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,China;Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Efficiency in Loess Plateau,Shanxi Agricultural University,Taigu 030801,China;National Demonstration Center for Agricultural Resources and Environment Experimental Teaching,Shanxi Agricultural University,Taigu 030801,China)

机构地区：[1]山西农业大学资源环境学院,山西太谷030801 [2]黄土高原特色作物优质高效生产省部共建协同创新中心,山西太谷030801 [3]山西农业大学农业资源与环境国家级实验教学示范中心,山西太谷030801

出　　处：《山西农业科学》2022年第5期645-652,共8页Journal of Shanxi Agricultural Sciences

基　　金：黄土高原特色作物优质高效生产省部共建协同创新中心基金项目(SBGJXTZX-25);山西省重点研发计划项目(201703D211001)。

摘　　要：为明确山西省谷子主栽区土壤硒含量现状,以及不同环境因素对硒利用效率的影响,选择山西省3个代表性县域作为研究区,采集土壤和谷子籽粒样品,分析其硒含量、硒的生物富集系数以及土壤基本理化性质与生物富集系数的关系。结果表明,研究区土壤平均硒含量为0.178 mg/kg,总体处于中等水平,其中,五寨县、临县土壤硒含量分别为0.140、0.144 mg/kg,均处于边缘水平;沁县土壤硒含量为0.251 mg/kg,处于适量水平。在不同土壤类型中,红黏土土壤和籽粒硒含量均最高,分别为0.280、0.028 mg/kg;黄绵土上谷子对硒的生物富集能力最强(16.87%),褐土上谷子的生物富集能力最弱(9.38%);不同谷子品种中,以沁州黄栽培区土壤和籽粒硒含量最高,分别为0.297、0.025 mg/kg,晋谷21号对硒的生物富集能力最强(18.66%),晋谷40号生物富集能力最弱(9.341%)。结合多元逐步回归分析和相关性分析可知,土壤硒含量、籽粒硒含量和谷子品种对硒富集系数的影响最大,分别能解释硒富集系数变化的27.9%、39.2%和0.14%;硒的生物富集系数与pH值、有机质分别呈极显著正相关和极显著负相关;与硝态氮呈显著负相关,与磷钾相关性不显著。In order to define the present situation of selenium(Se) content in soil in the millet planting area of Shanxi province and the effects of different environmental factors on Se utilization efficiency, in this study, three representative counties in Shanxi Province were selected as the study areas, soil samples and millet grains were collected in the areas, and Se content,Se bioenrichment coefficient, and the relationship between basic physical and chemical properties of soil and bioenrichment coefficient were analyzed. The results showed that the average Se content in soil in the study areas was 0.178 mg/kg, which was in the medium level in general. The Se contents in soil in Wuzhai county and Linxian county were 0.140 mg/kg and 0.144 mg/kg,respectively, which were in the marginal level. The Se content in soil in Qinxian county was 0.251 mg/kg, which was in the moderate level in general. Among different soil types, Se contents in soil and grains in red clay were the highest, which were0.280 mg/kg and 0.028 mg/kg, respectively. The bioenrichment ability of millet on loess soil was the highest(16.87%), and that on cinnamon soil was the weakest(9.38%). Among different millet varieties, the Se contents in soil and grains were the highest in Qinzhouhuang-millet cultivation area, which were 0.297 mg/kg and 0.025 mg/kg, respectively. In addition, Jingu 21 had the strongest bioenrichment ability(18.66%), while Jingu 40 had the weakest bioenrichment ability(9.341%). combining with multiple stepwise regression analysis and correlation analysis, Se contents in soil and grains, and millet variety had the greatest influence on Se enrichment coefficient, which could explain 27.9%, 39.2% and 0.14% of the variation of Se enrichment coefficient, respectively. The bioenrichment coefficient of Se had extremely significant positive correlation with pH value and extremely significant negative correlation with organic matter. And it was significantly negatively correlated with nitrate nitrogen,but not significantly correlated with pho

关 键 词：谷子 硒 生物富集系数 影响因素 

分 类 号：S515[农业科学—作物学]