湖北农业科学 ›› 2019, Vol. 58 ›› Issue (15): 107-110.doi: 10.14088/j.cnki.issn0439-8114.2019.15.025

• 检测分析 • 上一篇    下一篇

响应面法优化土壤有效硒浸提条件及生物有效性研究

刘淑琴, 陈永波, 黄光昱, 熊倩, 张朝阳, 陈娥, 秦邦, 邹雪园   

  1. 恩施土家族苗族自治州农业科学院, 湖北 恩施 445000
  • 收稿日期:2019-04-24 发布日期:2019-11-13
  • 通讯作者: 陈永波, 男, 正高职高级农艺师, 主要从事硒形态分析和土壤监测改良技术研究, (电子信箱)yongboc2019@163.com。
  • 作者简介:刘淑琴(1988-), 女, 湖南祁东人, 助理研究员, 硕士, 主要从事硒形态分析, (电话)18672397596(电子信箱)hdyjhx@sina.cn;
  • 基金资助:
    农业农村部行业标准制定(农财发[2016]29号第69项)

Optimization of soil available selenium extraction conditions and bioavailability by response surface methodology

LIU Shu-qin, CHEN Yong-bo, HUANG Guang-yu, XIONG Qian, ZHANG Chao-yang, CHEN E, QIN Bang, ZOU Xue-yuan   

  1. Enshi Tujia and Miao Autonomous Prefecture Academy of Agricultural Sciences, Enshi 445000, Hubei, China
  • Received:2019-04-24 Published:2019-11-13

摘要: 以土壤为材料, 采用KH2PO4溶液提取土壤中的有效硒。以有效硒的提取量为响应值, 浸提液浓度、pH、浸提时间和液料比为自变量, 建立数学模型, 利用响应面法获得土壤有效硒的最佳提取条件。结果表明, 土壤有效硒的最佳提取条件为浸提液浓度0.5 mol/L, pH 9.9, 浸提时间72 min, 液料比27∶1, 在此优化条件下有效硒提取量为0.56 mg/kg, 与响应面分析预测值0.53 mg/kg基本相符。作物盆栽试验也表明, 土壤有效硒的KH2PO4溶液浸提法可以作为评价土壤对作物有效态硒的指标。

关键词: 土壤, 有效硒, 生物有效性, 响应面法

Abstract: Using soil as material, KH2PO4 solution was used to extract available selenium from soil. Taking the available selenium extraction amount as the response value, the extract concentration, pH value, extraction time and liquid sample ratio were independent variables, and the mathematical model was established. The optimal extraction conditions of soil available selenium were obtained by response surface methodology. The results showed that the optimal extraction conditions for soil available selenium wereextract concentration 0.5 mol/L, pH 9.9, extraction time 72 min, liquid sample ratio 27∶1, and the available selenium extraction amount was 0.56 mg/kg under the optimized conditions, which is basically consistent with the response surface analysis predicted value of 0.53 mg/kg. The crop pot experiment showed that the KH2PO4 solution extraction method for soil available selenium can be used as an index to evaluate the soil available for crop selenium.

Key words: soil, available selenium, response surface

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