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农学学报

农学学报 ›› 2012, Vol. 2 ›› Issue (5): 44-48.

所属专题： 食用菌； 食用菌

• 土壤肥料 资源环境 生态 • 上一篇    下一篇

培养料及覆土中总Cd2+浓度对蘑菇子实体的影响

卢政辉 廖剑华 蔡志英 陈丹红 王泽生   

  • 收稿日期:2011-11-04 修回日期:2011-12-05 出版日期:2012-05-20 发布日期:2012-05-20
  • 基金资助:

    福建省科技重大专项子课题《动植物良种培育与关键配套技术研究与示范（食用菌）》子课题“双孢蘑菇农药、重金属、有害物质残留与控制研究”

Effects of the Total Cd2+ Concentration in Culture Material and Covering Soil on Mushroom Fruitbodies

  • Received:2011-11-04 Revised:2011-12-05 Online:2012-05-20 Published:2012-05-20

PDF (PC)

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摘要：

为了解双孢蘑菇子实体中Cd2+来源途径和吸附能力，以双孢蘑菇As2796为对象，分别向培养基和覆土中添加一定浓度的Cd2+浓度，研究双孢蘑菇第一潮、第二潮子实体对分别来自培养基和覆土中Cd2+的吸收富集规律，求证栽培过程中对Cd浓度的临界含量值。结果表明：双孢蘑菇对Cd2+不具有富集作用，第一潮子实体对培养料中Cd2+的平均吸收系数为0.329，是对覆土中Cd2+的平均吸收系数(0.0156)的21.1倍；第二潮子实体对培养料中Cd2+的平均吸收系数为0.122，是对覆土中Cd2+的平均吸收系数(0.0128)的9.5倍；且当培养料中Cd2+含量大于40 mg/kg将会抑制蘑菇子实体的纽结成长，导致绝收，说明在蘑菇栽培过程中，对培养基Cd2+浓度的检测尤为重要。通过回归方程模型的建立，得出子实体Cd2+含量符合中国蘑菇无公害标准和绿色食品标准时，其来自培养料和覆土中的Cd2+临界含量值分别为6.70 mg/kg、1.45 mg/kg，32.66 mg/kg、5.39 mg/kg。

关键词: 叶面肥, 叶面肥, 水稻, 镉, 生长状况, 镉积累

Abstract:

The objective of this study was to investigate the source and the capacity to adsorbent of the Cd2+ in fruitbodies of Agaricus bisporus , the enrichment law of Cd2+ from first flush and second flush of fruitbodies of Agaricus bisporus 2796 was analysised through adding Cd＋ion to culture material and covering soil to confirm the critical content value of Cd＋ion concentration in the cultivation process. The results showed that the Agaricus bisporus doesn’t have enrichment effect on Cd, and the average Cd absorption coefficient from culture material for the first flush of fruitbodies was 0.329. It was 21.1 times to 0.0156 from covering soil. And the similar data was 0.122 for second flush of fruitbodies to Cd from culture material, that was 9.5 times higher than that 0.0128 from covering soil. It also showed that it can inhibit the knot growth of the Agaricus bisporu’;s fruitbodies and make total crop failure when the concentration of Cd＋ion is higher than 40 mg/kg. It suggested that the detection of Cd＋ion of the culture material is very important in the cultivation process of Agaricus bisporus. When the Cd content of fruitbodies conforms to the no social effects of pollution standardization and the green foods standardizaton for mushroom in China, the value of the critical content of Cd from culture material and covering soil is 6.70 mg/kg, 1.45 mg/kg, 32.66mg/kg and 5.39mg/kg by regression model, respectivily.