耐性植物秸秆覆盖对荠菜生长及镉积累的影响  

Effects of Mulching with Cadmium Tolerant Plant Straws on Growth and Cadmium Accumulation of Capsella Bursa-pastoris in Cadmium Contaminated Soil

作　　者：王恒 石军 林立金[3] 杨代宇 黄科文[4] 张潇[4] 

机构地区：[1]四川禹能工程咨询有限公司,四川成都610040 [2]绵阳市农业科学研究院,四川绵阳621023 [3]四川农业大学果蔬研究所,四川成都611130 [4]四川农业大学园艺学院,四川成都611130

出　　处：《水土保持通报》2016年第1期184-187,共4页Bulletin of Soil and Water Conservation

基　　金：国家农业科技成果转化资金项目"川花梨新品种中试与优质高产栽培技术应用及产业化示范"(2011GB2F000006)

摘　　要：[目的]研究秸秆覆盖对富集植物重金属积累的影响,筛选能促进荠菜生长和镉积累的镉耐性植物.[方法]通过盆栽试验研究镉污染条件下,覆盖4种镉耐性植物(扬子毛茛、通泉草、邻近风轮菜和车前)秸秆对荠菜生长及镉积累的影响。[结果]覆盖扬子毛茛、通泉草、邻近风轮菜和车前秸秆后,荠菜的地上部分生物量、总生物量和叶片叶绿素含量值均低于未覆盖处理。覆盖扬子毛茛、通泉草、邻近风轮菜和车前秸秆的荠菜总生物量则较未覆盖分别降低了34.04%,49.85%,40.27%和18.39%。只有覆盖邻近风轮菜秸秆提高了荠菜根系镉含量,而覆盖扬子毛茛和通泉草秸秆则提高了荠菜地上部分镉含量(较未覆盖分别提高了18.61%和12.87%)。然而,覆盖4种耐性植物的荠菜根系、地上部分及整株镉积累量均低于未覆盖。[结论]在盆栽条件下,覆盖镉耐性植物(扬子毛茛、通泉草、邻近风轮菜和车前)秸秆不能提高荠菜对镉污染土壤的修复能力。[Objective]The objective of this paper is to study the effect of mulching with straws of four cadmium tolerant species on heavy metal accumulation of accumulator in order to select cadmium tolerant species which can promote the growth cadmium accumulation of Capsella bursa-pastoris.[Methods]A pot experiment was conducted to study the effects of mulching with straws of four cadmium tolerant species（Ranunculus sieboldii,Mazus japonicus,Clinopodium confine and Plantago asiatica）on growth and cadmium accumulation of Capsella bursa-pastoris in Cd-contaminated soil.[Results]The soil mulching with R.sieboldii,M.japonicus,C.confine and P.asiaticastraws reduced the shoot biomass,total biomass and leaf SPAD value of C.bursa-pastoris compared with control.Compared with control,the soil mulching with R.sieboldii,M.japonicus,C.confine and P.asiatica straws reduced the whole biomass of C.bursa-pastoris by37.61%,52.14%,43.76%and 21.71%respectively.Only C.confine straw increased the cadmium content in root of C.bursa-pastoris,and R.sieboldii and M.japonicus straws increased the cadmium content in shoot of C.bursa-pastoris by 18.61% and 12.87%respectively.The cadmium exactions in root,shoot and whole plant of C.bursa-pastoris decreased when mulched with four cadmium tolerant plant straws.[Conclusion]The soil mulching with four cadmium tolerant plant（Ranunculus sieboldii,Mazus japonicus,Clinopodium confine and Plantago asiatica）straws cannot enhance the ability of Capsella bursa-pastoris to remedy cadmium contaminated soil under pot experiment conditions.

关 键 词：耐性植物秸秆 荠菜 镉 化感作用 植物修复 

分 类 号：X53[环境科学与工程—环境工程] X173