生态与农村环境学报
生態與農村環境學報
생태여농촌배경학보
Journal of Ecology and Rural Environment
2015年
5期
753-759
,共7页
三叶鬼针草%生态型%混种%镉积累
三葉鬼針草%生態型%混種%鎘積纍
삼협귀침초%생태형%혼충%력적루
Bidens pilosa%ecotype%interplantation%cadmium accumulation
为研究不同混种比例对2种生态型三叶鬼针草（ Bidens pilosa）镉积累的影响，通过盆栽试验研究了镉污染条件下（ w为10 mg·kg－1）农田生态型与矿山生态型三叶鬼针草在混种株数比例为1∶4、2∶3、3∶2、4∶1以及单种时2种生态型三叶鬼针草对镉的积累效果。结果表明，混种提高了农田生态型三叶鬼针草单株生物量，但降低了矿山生态型三叶鬼针草单株生物量。混种也提高了2种生态型三叶鬼针草的叶绿素a、叶绿素b及类胡萝卜素含量。此外，混种显著提高了2种生态型三叶鬼针草各器官的镉含量（ P＜0?05）。当农田生态型与矿山生态型混种株数比例为2∶3时，2种生态型三叶鬼针草各器官镉含量均最大，且单盆三叶鬼针草地上部分及整株镉积累量也最大，分别为422?08和477?91μg·盆－1。因此，农田生态型与矿山生态型三叶鬼针草混种株数比例为2∶3时能有效提高2种生态型三叶鬼针草对镉的积累能力，增强对镉污染土壤的修复效果。
為研究不同混種比例對2種生態型三葉鬼針草（ Bidens pilosa）鎘積纍的影響，通過盆栽試驗研究瞭鎘汙染條件下（ w為10 mg·kg－1）農田生態型與礦山生態型三葉鬼針草在混種株數比例為1∶4、2∶3、3∶2、4∶1以及單種時2種生態型三葉鬼針草對鎘的積纍效果。結果錶明，混種提高瞭農田生態型三葉鬼針草單株生物量，但降低瞭礦山生態型三葉鬼針草單株生物量。混種也提高瞭2種生態型三葉鬼針草的葉綠素a、葉綠素b及類鬍蘿蔔素含量。此外，混種顯著提高瞭2種生態型三葉鬼針草各器官的鎘含量（ P＜0?05）。噹農田生態型與礦山生態型混種株數比例為2∶3時，2種生態型三葉鬼針草各器官鎘含量均最大，且單盆三葉鬼針草地上部分及整株鎘積纍量也最大，分彆為422?08和477?91μg·盆－1。因此，農田生態型與礦山生態型三葉鬼針草混種株數比例為2∶3時能有效提高2種生態型三葉鬼針草對鎘的積纍能力，增彊對鎘汙染土壤的脩複效果。
위연구불동혼충비례대2충생태형삼협귀침초（ Bidens pilosa）력적루적영향，통과분재시험연구료력오염조건하（ w위10 mg·kg－1）농전생태형여광산생태형삼협귀침초재혼충주수비례위1∶4、2∶3、3∶2、4∶1이급단충시2충생태형삼협귀침초대력적적루효과。결과표명，혼충제고료농전생태형삼협귀침초단주생물량，단강저료광산생태형삼협귀침초단주생물량。혼충야제고료2충생태형삼협귀침초적협록소a、협록소b급류호라복소함량。차외，혼충현저제고료2충생태형삼협귀침초각기관적력함량（ P＜0?05）。당농전생태형여광산생태형혼충주수비례위2∶3시，2충생태형삼협귀침초각기관력함량균최대，차단분삼협귀침초지상부분급정주력적루량야최대，분별위422?08화477?91μg·분－1。인차，농전생태형여광산생태형삼협귀침초혼충주수비례위2∶3시능유효제고2충생태형삼협귀침초대력적적루능력，증강대력오염토양적수복효과。
To study effects of interplantation ratio on cadmium accumulation of two ecotypes ( farmland and mining) of Bi?dens pilosa, a pot experiment, designed to have six treatments in ratio, i.e. 1 ∶ 4, 2 ∶ 3, 3 ∶ 2, 4 ∶ 1, farmland ecotype only and mining ecotype only, and the soil spiked with 10 mg·kg-1 cadmium, was conducted. Results demonstrate that as compared with their respective treatments of monoculture interplantation increased the farmland ecotype of B. pilosa bio?mass, but decreased the mining ecotype of B. pilosa in biomass per plant, and significantly increased the contents of chlo?rophyll a, chlorophyll b and carotenoid in the two ecotypes of B. pilosa, and the concentration of cadmium in various or?gans of the two ecotypes of B. pilosa. When the interplantation ratio was 2 ∶ 3 (farmland ecotype ∶ mining ecotype),the content of cadmium was the highest in all organs of the two ecotypes of B. pilosa, and the cadmium accumulation in the shoots and the whole plant in one pot were also the highest, reaching up to 422?08 and 477?91 μg·pot-1 , respectively. To sum up, the interplantation of the two ecotypes of B. pilosa at a ratio of 2 ∶ 3 ( farmland ecotype ∶ mining ecotype) may effectively improve the plants′cadmium accumulation capacity, and consequently the effect of the two ecotypes of B. pilosa remedying cadmium contaminated soils.
