韶关学院学报
韶關學院學報
소관학원학보
Journal of Shaoguan University(Social Science Edition)
2015年
4期
36~40
,共null页
张振明 肖艳辉 何金明 潘春香
張振明 肖豔輝 何金明 潘春香
장진명 초염휘 하금명 반춘향
低镉水平 钼 小白菜 镉含量
低鎘水平 鉬 小白菜 鎘含量
저력수평 목 소백채 력함량
low cadmium level;molybdenum;Chinese white cabbage;growth;cadmium content
为了探明低浓度镉污染下,增加钼离子浓度后植物对镉的吸收累积状况,为低浓度镉污染土壤修复提供参考.以"四季上海青"小白菜为材料,采用营养液培养的方式,研究了钼对0.1 mg/L镉水平下小白菜生长、生理指标及镉含量的影响.结果表明:在0.1 mg/L镉浓度培养液中随钼浓度增加,小白菜株高变化不显著,而其地上部鲜重和干重、地下部鲜重和干重、活根系总长度、根投影表面积、活根系总表面积、活根系平均直径、叶绿素a、叶绿素b、叶绿素a+b及类胡萝卜素含量、净光合速率和蒸腾速率、可溶性糖含量、全氮含量等均呈下降趋势,而全钾和全钠含量则有所增加.可见,在0.1 mg/L浓度镉污染土壤上种植小白菜,增加钼肥的施用,会增加小白菜体内镉的累积,增加食用风险.
為瞭探明低濃度鎘汙染下,增加鉬離子濃度後植物對鎘的吸收纍積狀況,為低濃度鎘汙染土壤脩複提供參攷.以"四季上海青"小白菜為材料,採用營養液培養的方式,研究瞭鉬對0.1 mg/L鎘水平下小白菜生長、生理指標及鎘含量的影響.結果錶明:在0.1 mg/L鎘濃度培養液中隨鉬濃度增加,小白菜株高變化不顯著,而其地上部鮮重和榦重、地下部鮮重和榦重、活根繫總長度、根投影錶麵積、活根繫總錶麵積、活根繫平均直徑、葉綠素a、葉綠素b、葉綠素a+b及類鬍蘿蔔素含量、淨光閤速率和蒸騰速率、可溶性糖含量、全氮含量等均呈下降趨勢,而全鉀和全鈉含量則有所增加.可見,在0.1 mg/L濃度鎘汙染土壤上種植小白菜,增加鉬肥的施用,會增加小白菜體內鎘的纍積,增加食用風險.
위료탐명저농도력오염하,증가목리자농도후식물대력적흡수루적상황,위저농도력오염토양수복제공삼고.이"사계상해청"소백채위재료,채용영양액배양적방식,연구료목대0.1 mg/L력수평하소백채생장、생리지표급력함량적영향.결과표명:재0.1 mg/L력농도배양액중수목농도증가,소백채주고변화불현저,이기지상부선중화간중、지하부선중화간중、활근계총장도、근투영표면적、활근계총표면적、활근계평균직경、협록소a、협록소b、협록소a+b급류호라복소함량、정광합속솔화증등속솔、가용성당함량、전담함량등균정하강추세,이전갑화전납함량칙유소증가.가견,재0.1 mg/L농도력오염토양상충식소백채,증가목비적시용,회증가소백채체내력적루적,증가식용풍험.
The objective of this study was to ascertain the status that cadmium was absorbed by Chinese white cabbage in low concentration cadmium and molybdenum supplement medium. The effects of molybdenum ion c oncentratio n (0.05,0.1 mg·L^-1)on the growth, cadmium content and physiological indexes under cadmium treatment(0.1 mg·L^-1) were studied on the basis of Hoagland nutrition. The results showed no significant difference in plant height by increasing molybdenum concentrations , while fresh weight (F.W)and dry weight (D.W) aboveground and underground, total root length,total project area, total root surfer area,total average diameter, chlorophyll a, chlorophyll b, chlorophyll a+b and carotenoid contents, net photosynthetic rate and transpiration rate had the trend of decreasing, and cadmium content aboveground of Chinese white cabbage had a trend of increasing. With molybdenum concentrations increasing under cadmium treatment, solubility sugar and total nitrogen contents had the trend of reducing, while total kalium and total sodium contents had the trend of increasing. So the increased molybdenum concentrations could induce plant to increase the absorption of cadmium in low concentration cadmium(0.1 mg·L^-1), and enhance the consumption risk.