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时间:2017-12-08
《培养料及覆土中总cd2+浓度对蘑菇子实体的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、农学学报2012,2(05):44-48JournalofAgriculturewww.caaj.org2+培养料及覆土中总Cd浓度对蘑菇子实体的影响11231卢政辉,廖剑华,蔡志英,陈丹红,王泽生(1福建省农科院食用菌研究所,福州350014;2龙海市农业局,福建龙海351600;3福建省测试技术研究所,福州350001)2+摘要:为了解双孢蘑菇子实体中Cd来源途径和吸附能力,以双孢蘑菇As2796为对象,分别向培养基2+和覆土中添加一定浓度的Cd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2+2+Cd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
2、孢蘑菇对Cd不具有富集2+2+作用,第一潮子实体对培养料中Cd的平均吸收系数为0.329,是对覆土中Cd的平均吸收系数(0.0156)2+2+的21.1倍;第二潮子实体对培养料中Cd的平均吸收系数为0.122,是对覆土中Cd的平均吸收系数2+(0.0128)的9.5倍;且当培养料中Cd含量大于40mg/kg将会抑制蘑菇子实体的纽结成长,导致绝收,说2+2+明在蘑菇栽培过程中,对培养基Cd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Cd临界含量值分别为6.70mg/kg、1.45mg/kg、32.66mg/
3、kg、5.39mg/kg。关键词:培养料;覆土;镉;蘑菇中图分类号:S646.1+1文献标志码:A论文编号:2011-09352+EffectsoftheTotalCdConcentrationinCultureMaterialandCoveringSoilonMushroomFruitbodies11231LuZhenghui,LiaoJianhua,CaiZhiying,ChenDanhong,WangZesheng(1EdibleFungiInstituteofFujianAcademyofAgriculturalSciences,Fuzhou350014,Fujian,China
4、;2LonghaiCityBureauofAgriculture,Longhai351600,Fujian,China;3TestingInstituteofTechnologyofFujian,Fuzhou350001,Fujian,China)2+Abstract:TheobjectiveofthisstudywastoinvestigatethesourceandthecapacitytoadsorbentoftheCdin2+fruitbodiesofAgaricusbisporus,theenrichmentlawofCdfromfirstflushandsecondflush
5、offruitbodiesof2+Agaricusbisporus2796wasanalysisedthroughaddingCdiontoculturematerialandcoveringsoiltoconfirm2+thecriticalcontentvalueofCdionconcentrationinthecultivationprocess.TheresultsshowedthattheAgaricusbisporusdidn’thaveenrichmenteffectonCd,andtheaverageCdabsorptioncoefficientfromculturema
6、terialforthefirstflushoffruitbodieswas0.329.Itwas21.1timesto0.0156fromcoveringsoil.Andthesimilardatawas0.122forsecondflushoffruitbodiestoCdfromculturematerial,thatwas9.5timeshigherthanthat0.0128fromcoveringsoil.ItalsoshowedthatitcaninhibittheknotgrowthoftheAgaricusbisporu’;s2+fruitbodiesandmaketo
7、talcropfailurewhentheconcentrationofCdionwashigherthan40mg/kg.It+suggestedthatthedetectionofCdionoftheculturematerialwasveryimportantinthecultivationprocessofAgaricusbisporus.WhentheCdcontentoffruitbodiesconformstothen
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