本文選題：香樟 + 樹干��； 參考：《浙江農(nóng)林大學(xué)》2017年碩士論文

【摘要】：本文以浙江永康市城市常見綠化樹種香樟為研究對(duì)象,根據(jù)不同污染梯度在研究區(qū)內(nèi)設(shè)置12個(gè)樣地,分別采集植物地上部分(樹葉、樹枝、樹干)樣品共計(jì)108個(gè)及植物根際土壤樣品36個(gè),利用ICP-OES測(cè)定植物樣品中Cu、Zn、Pb、Cr、Mn、Ni六種重金屬元素濃度,分析城市綠化樹種對(duì)Cu、Zn、Pb、Cr、Mn、Ni六種重金屬元素的吸收作用,以及各重金屬元素在香樟各器官中的分布特征,探討不同污染梯度下植物對(duì)重金屬元素的富集特征,研究結(jié)果顯示:(1)香樟樹葉和樹枝重金屬元素濃度大小順序均為MnZnCuCrPbNi,香樟樹干重金屬元素濃度大小順序?yàn)镸nZnCrPbNiCu,樹葉中重金屬M(fèi)n元素的濃度和樹干中Pb、Cr、Ni元素的濃度明顯高于其它重金屬元素在各器官中濃度。(2)香樟各器官對(duì)不同重金屬元素的富集系數(shù)大小順序具有一定差異,其中樹葉對(duì)Mn、樹干對(duì)Pb和Ni具有明顯的富集能力;各器官在不同土壤重金屬濃度梯度下,總體呈現(xiàn)隨土壤重金屬濃度梯度的升高富集系數(shù)逐漸下降的趨勢(shì)。(3)胸徑為22cm的單株香樟地上部分總積累量為18935.36 mg,各器官積累量的大小順序?yàn)闃淙~樹干樹枝,積累量分別為7920.75 mg、6202.21 mg和4812.40mg,香樟樹干對(duì)重金屬元素Cu、Zn、Pb、Cr、Ni的富集效能顯著高于其它器官,分別占地上部分總積累量的59.72%、61.80%、81.62%、71.09%和91.89%,富集效能較明顯。(4)利用香樟樹干對(duì)不同等級(jí)的重金屬污染土壤的修復(fù)年限進(jìn)行預(yù)測(cè),樹干對(duì)Cu、Pb、Ni的重度污染土壤修復(fù)年限分別為15年/hm2、42年/hm2和56年/hm2,樹干對(duì)Cr、Zn的修復(fù)年限較長(zhǎng)分別為135年/hm2和219年/hm2。(5)研究區(qū)內(nèi)香樟根際土壤存在重金屬Cr污染,且污染程度達(dá)到中度污染等級(jí),Cu、Zn、Ni、Pb達(dá)到輕污染等級(jí),Mn在安全范圍內(nèi)。香樟對(duì)重金屬元素Mn、Cu、Cr、Ni的富集系數(shù)均隨土壤污染梯度的升高而降低,而重金屬元素Zn、Pb的富集系數(shù)均隨土壤污染梯度的升高而升高。
[Abstract]:Taking camphor camphora, a common greening tree species in Yongkang City, Zhejiang Province as the research object, 12 plots were set up in the study area according to different pollution gradients, and the above ground parts (leaves, branches, branches) of plants were collected separately. A total of 108 tree trunks and 36 rhizosphere soil samples were collected. The concentrations of six heavy metals in plant samples were determined by ICP-OES, and the absorption of six heavy metal elements by urban greening tree species was analyzed. The distribution characteristics of heavy metal elements in different organs of Cinnamomum camphora were also discussed, and the enrichment characteristics of heavy metal elements in plants with different pollution gradients were discussed. The results showed that the concentration order of heavy metal elements in leaves and branches of camphor tree was MnZnCuCrPbNi. the order of concentration of dry metal elements of camphor tree was MnZnCrPbNiCu. the concentration of heavy metal mn in leaves and the concentration of PbPbPbNiin in tree trunk were obviously higher. The enrichment coefficient of different heavy metal elements in different organs of Cinnamomum camphora varied with the concentration of other heavy metal elements in different organs. Among them, leaves have obvious enrichment ability to mn, trunk to Pb and Ni. As a whole, the accumulation coefficient decreased with the increase of soil heavy metal concentration gradient. The total accumulation of the aboveground part of Cinnamomum camphora with DBH of 22cm was 18935.36 mg, and the order of accumulation of each organ was tree branch of leaf trunk. The accumulations were 7920.75 mg / g 6202.21 mg and 4812.40 mg / g respectively. 59.72% of the total accumulated amount of the aboveground part was 61.80% and 71.09% and 91.89%, respectively, and the enrichment efficiency was obvious. 4) the remediation years of soils contaminated by heavy metals of different grades were predicted by using the stem of camphor tree. The remediation life of heavily polluted soil from trunk to Cu PbN was 15 years / hm ~ 2, 42 / hm ~ 2 and 56 years / hm ~ 2, respectively, and the restoration life of tree trunk to Cr-Zn was 135 / hm ~ 2 / hm ~ 2 and 219 / hm ~ 2 / hm ~ (5) respectively. There was Cr pollution in the soil of Cinnamomum camphora rhizosphere in the study area. And the pollution degree reached the moderate pollution grade. The content of Cu ~ (2 +) Zn ~ (2 +) Ni ~ (2 +) Pb reached the light pollution grade (mn) in the safe range. The enrichment coefficient of heavy metal mn _ (Cu) Cu _ (Cr) Cr ~ (2 +) Ni of Cinnamomum camphora decreased with the increase of soil pollution gradient, while the enrichment coefficient of heavy metal element Zn ~ (+) Pb increased with the increase of soil pollution gradient.
【學(xué)位授予單位】：浙江農(nóng)林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X173;S792.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 齊鵬;余樹全;張超;梁立成;車?yán)^魯;;城市地表水表層沉積物重金屬污染特征與潛在生態(tài)風(fēng)險(xiǎn)評(píng)估:以永康市為例[J];環(huán)境科學(xué);2015年12期

2 王愛霞;方炎明;;二球懸鈴木不同器官對(duì)空氣中Cu、Ni、Pb和Zn的累積作用[J];植物資源與環(huán)境學(xué)報(bào);2015年02期

3 王超;畢君;宋熙龍;尤海舟;;6種植物對(duì)鋅的耐性和富集能力[J];環(huán)境科學(xué)與技術(shù);2014年S2期

4 唐麗清;邱\發(fā);韓玉麗;王榮芬;;不同徑級(jí)國(guó)槐行道樹重金屬富集效能比較[J];生態(tài)學(xué)報(bào);2015年16期

5 高紅真;郭偉珍;畢君;;20種植物對(duì)鉛的耐性和富集能力研究[J];中國(guó)農(nóng)學(xué)通報(bào);2014年19期

6 魯紹偉;高琛;楊新兵;李少寧;陳波;孔令偉;任翠梅;;北京市不同污染區(qū)主要綠化樹種對(duì)土壤重金屬的富集能力[J];東北林業(yè)大學(xué)學(xué)報(bào);2014年05期

7 李少寧;孔令偉;魯紹偉;陳波;高琛;石媛;;北京常見綠化樹種葉片富集重金屬能力研究[J];環(huán)境科學(xué);2014年05期

8 王榮芬;邱爾發(fā);唐麗清;;行道樹毛白楊樹干中重金屬元素分布[J];生態(tài)學(xué)報(bào);2014年15期

9 高凱;胡永紅;冷寒冰;孟超;秦俊;;兩種測(cè)算香樟單株植物生物量和生產(chǎn)力的方法[J];生態(tài)學(xué)雜志;2014年01期

10 孫慧珍;高禾;蔡春菊;祝寧;;哈爾濱市4種闊葉樹樹干重金屬含量動(dòng)態(tài)變化及富集特征[J];南京林業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年06期

相關(guān)碩士學(xué)位論文 前2條

1 陳靜文;公路路域綠化帶植物重金屬分布規(guī)律及富集性研究[D];長(zhǎng)安大學(xué);2013年

2 龐靜;北京耐土壤重金屬污染城市綠化植物的篩選與評(píng)價(jià)[D];北京林業(yè)大學(xué);2008年

，

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