本文關(guān)鍵詞： 銅 重金屬污染 種子萌發(fā) 幼苗生長 植物修復(fù)　出處：《家畜生態(tài)學(xué)報(bào)》2016年12期 　論文類型：期刊論文

【摘要】：為了選擇能夠富集重金屬銅或?qū)︺~具有耐性的牧草植物,以修復(fù)銅污染土壤,利用土培方法,研究紫花苜蓿、三葉草和紫穗槐等3種樹草種植物在不同銅濃度水平(0%、17%、20%、25%、33%、50%、100%)下的發(fā)芽能力和苗木生長指標(biāo)、苗木生物量以及植株全銅含量的變化。結(jié)果表明:紫穗槐和紫花苜蓿的發(fā)芽情況表現(xiàn)為"低促高抑"現(xiàn)象,分別在20%和33%銅濃度下發(fā)芽勢最高(P0.05),100%銅濃度下最低(P0.05)。然而,100%銅濃度對三葉草無明顯影響(P0.05),三葉草的發(fā)芽率/勢在17%~50%銅濃度下顯著升高(P0.05)。紫穗槐的苗高、根長和生物量在銅濃度≥25%時(shí)顯著降低(P0.05),僅根長在20%銅濃度下顯著升高(P0.05)。紫花苜蓿的苗高和地徑分別在25%和20%~50%銅濃度下顯著升高(P0.05);各銅濃度對根長和生物量無顯著影響(P0.05)。三葉草的苗高、根長和生物量分別在20%~50%和20%的銅濃度下顯著升高(P0.05),生物量在銅濃度≥33%時(shí)顯著降低(P0.05);各銅濃度對地徑無顯著影響(P0.05)。三種植物對銅的吸附能力依次為三葉草紫穗槐紫花苜蓿,建議選擇三葉草用于西北地區(qū)銅污染土壤的生態(tài)恢復(fù)。
[Abstract]:In order to select forage plants which can enrich heavy metal copper or have tolerance to copper in order to repair copper contaminated soil, alfalfa was studied by soil culture method. The germinating ability and seedling growth index of three species of tree grass such as clover and Amorpha fruticosa at different copper concentration levels are about 20, 25, 33, 50 and 100, respectively. The results showed that the germination of Amorpha fruticosa and alfalfa showed the phenomenon of "low promoting high inhibition". At 20% and 33% Cu concentrations, the highest germination potential of P0.05 and the lowest P0.05U at 100% Cu concentration were observed. 100% Cu concentration had no obvious effect on Clover P0.05, but the germination rate / potential of Clover increased significantly under the concentration of 17 ~ 50% Cu, and the seedling height of Amorpha fruticosa. Root length and biomass decreased significantly (P 0.05) when Cu concentration 鈮，

本文編號(hào)：1448995