陕西科技大学学报（自然科学版）
陝西科技大學學報（自然科學版）
협서과기대학학보（자연과학판）
Journal of Shaanxi University of Science and Technology (Natural Science Edition)
2015年
5期
30-33,39
,共5页
金盏菊%复合胁迫%生长状况%富集行为%重金属
金盞菊%複閤脅迫%生長狀況%富集行為%重金屬
금잔국%복합협박%생장상황%부집행위%중금속
Calendula officinalis L%combined stress%grow th%bioaccumulation behavior%heavy metal
花卉类植物的抗逆环境能力较强，生长周期较短、生物量较大；利用花卉类植物修复重金属污染土壤，有效避免了食物链循环效应对人体健康的潜在威胁，因此，该修复技术的安全性较好、实用性较强。通过盆栽试验研究Pb／Cd复合污染对金盏菊（Calendula officinalis L ）幼苗生长状况的影响，同时考察土壤持水量对Pb／Cd富集行为的影响。研究发现：污染胁迫条件下，金盏菊幼苗的出苗率都维持在45％以上；黄土Pb／Cd对金盏菊生物量的影响不大，金盏菊幼苗的生长过程能够一定程度上改良黄土理化性质。通过扫描电镜发现，幼苗根部较空白对照组发生显著改变，以适应重金属的复合胁迫作用。此外，过高或过低的土壤持水量都不利于金盏菊幼苗对Pb／Cd的吸收积累，根部是金盏菊幼苗积累Cd的主要部位，且金盏菊幼苗对黄土中Cd的萃取能力较强。
花卉類植物的抗逆環境能力較彊，生長週期較短、生物量較大；利用花卉類植物脩複重金屬汙染土壤，有效避免瞭食物鏈循環效應對人體健康的潛在威脅，因此，該脩複技術的安全性較好、實用性較彊。通過盆栽試驗研究Pb／Cd複閤汙染對金盞菊（Calendula officinalis L ）幼苗生長狀況的影響，同時攷察土壤持水量對Pb／Cd富集行為的影響。研究髮現：汙染脅迫條件下，金盞菊幼苗的齣苗率都維持在45％以上；黃土Pb／Cd對金盞菊生物量的影響不大，金盞菊幼苗的生長過程能夠一定程度上改良黃土理化性質。通過掃描電鏡髮現，幼苗根部較空白對照組髮生顯著改變，以適應重金屬的複閤脅迫作用。此外，過高或過低的土壤持水量都不利于金盞菊幼苗對Pb／Cd的吸收積纍，根部是金盞菊幼苗積纍Cd的主要部位，且金盞菊幼苗對黃土中Cd的萃取能力較彊。
화훼류식물적항역배경능력교강，생장주기교단、생물량교대；이용화훼류식물수복중금속오염토양，유효피면료식물련순배효응대인체건강적잠재위협，인차，해수복기술적안전성교호、실용성교강。통과분재시험연구Pb／Cd복합오염대금잔국（Calendula officinalis L ）유묘생장상황적영향，동시고찰토양지수량대Pb／Cd부집행위적영향。연구발현：오염협박조건하，금잔국유묘적출묘솔도유지재45％이상；황토Pb／Cd대금잔국생물량적영향불대，금잔국유묘적생장과정능구일정정도상개량황토이화성질。통과소묘전경발현，유묘근부교공백대조조발생현저개변，이괄응중금속적복합협박작용。차외，과고혹과저적토양지수량도불리우금잔국유묘대Pb／Cd적흡수적루，근부시금잔국유묘적루Cd적주요부위，차금잔국유묘대황토중Cd적췌취능력교강。
Having a short grow th periodicity and a strong enrichment in biomass ,the adaption to adverse environment of ornamental plants is quite strong ,and the circulatory effect of food chain ,a potential threat to human health ,could be effectively avoided w hen using ornamental plants to restore contaminated soil with heavy metal ,so this technology are proved security and practicability .The pot experiments were conducted to study the effect of Pb/Cd com‐bined pollution on the grow th of Calendula officinalis L and the effect of soil moisture on the bioaccumulation behavior of the seedlings .The results indicated that the emergence rate remained 45% or more under the contamination condition ,the lead/cadmium in loess had a little effect on the biomass of Calendula officinalis L ,and the grow th process of seedlings could improve partly physical and chemical properties of contaminated loess .Compared with the CK ,the root morphology of seedlings was significantly changed by SEM so that Calendu‐la officinalis L can be applied to the combined stress of the heavy metals .Moreover ,it was unfavorable to the absorption and bioaccumulation of Pb/Cd if the soil moisture were too low or too high ,the root is the main organ for absorbing and accumulating cadmium ,and the ex‐traction ability of seedlings on cadmium was quite strong .
