摘要
【研究目的】笔者研究了姬松茸生产栽培过程中对重金属Pb、As、Hg、Cd的富集规律及控制技术;【方法】采用定点取样和测定分析;【结果】结果表明:随着培养料的堆制,在微生物和菌丝的作用下将重金属Pb、As、Hg、Cd的迁移到子实体;子实体内Pb、As、Hg、Cd含量与培养料中Pb、As、Hg、Cd的含量关系密切,前三者随着潮数而递增,Cd则随潮数而递减;子实体对Pb和As的富集作用不显著,富集系数均值分别为0.22和0.56;而对Hg、Cd的富集作用明显,其富集系数分别达2.4￣4倍和27.8￣32.4。覆土土壤中的重金属在菌丝作用下部分迁移到子实体内;菌盖中Cd、Hg和As含量分别是菌柄的3.75、2.75和2.27倍;而Pb在菌盖和菌柄中含量则无差别;【结论】选择重金属低污染的培养料、覆土土壤和粗柄型菌株是实现姬松茸子实体重金属低富集的关键措施。
[OBJECTIVE] Accumulation rule of heavy metal Pb, As, Hg and Cd by Agaricus btazei murrill and controlling technique were studied during the process of Agaricus blazei murrill cultivation. [METHOD] Placement sampling and testing ＆ analysis were carried out. [RESULTS] The results showed that both microorganism and mycelium took part in accumulation of heavy metal Pb, As, Hg, Cd, and which migrated to fruit body. The accumulation of Pb and As by fruit body was not significant, accumulation coefficient was 0.22 and 0.56, respectively. While the accumulation of Hg, Cd was significant, accumulation coefficient ranged from 2.4 to 0.58 and from 27.8 to 32.4. Some heavy mental of sealing soil by mycelium migrated to fruit body, too. The content of Cd, Hg and As in cap was 3.75, 2.75, 2.27 times, respectively than in stipe. There were no different content of Pb in cap and stipe. [CONCLUSION] The medium material, sealing soil in low contents of heavy metal and enlarged stipe strain were key to measure of approaching to lower contents of heavy metals in fruit body.
出处
《中国农学通报》
CSCD
2007年第3期406-409,共4页
Chinese Agricultural Science Bulletin
基金
福建省重大招标项目"姬松茸绿色食品标准研究及示范基地建设"(2003-N-011)
关键词
姬松茸
培养料
覆土土壤
子实体
重金属
富集规律
控制技术
Agaricus blazei murrill, Medium material, Sealing soil, Fruit body, Heavy metals, Accumulation rule, Controlling technique
