摘要
研究调查了杭州市30个蔬菜基地土壤和蔬菜重金属含量,通过分析各蔬菜的富集系数和转运系数,研究了叶菜类、根茎类、茄果类共27种蔬菜对土壤Cu、Zn、Cd、Cr、Pb的富集特性,旨在了解不同蔬菜对重金属富集特性的差异,并就中轻度重金属污染菜地上的蔬菜种植提出合理建议。结果表明:在中轻度重金属污染土壤中,叶菜类中的筒蒿、甘蓝、菜心、芹菜和长白菜,根茎类中的白萝卜、胡萝卜,茄果类的西红柿等对重金属的富集能力相对较低,可以优先考虑种植;而叶菜中的白苋菜、红苋菜、塌棵菜、西兰花、紫背天葵、雪菜和生菜,根茎类中的莴苣、芋艿、大红萝卜和樱桃萝卜及茄果中的甜椒等对重金属富集能力相对较高,应尽量避免选择种植于中轻度重金属污染菜地。
A field survey of heavy metal concentrations in soils and vegetables grown in 30 vegetable farmlands of Hangzhou City were car-ried out. Through calculating the bioconcentration factor（BCF）and transfer factor（TF）for different heavy metals（Cu, Zn, Cd, Cr and Pb）in 27 kinds of different vegetables which belong to leafy vegetables, root vegetables or eggplant fruit vegetables, assessing their accumulation characteristics of heavy metals according to the differences of the bio-concentration factor, the reasonable proposals were put forward to opti-mize the planting structure of vegetables in mild and middle-level heavy metal contamination soils. The experimental results were as follows：In soils with mild and middle-level heavy metal contamination, leafy vegetables, such as crown daisy, cabbage, celery and Chinese long cab-bage, had relatively low enrichment ability of heavy metals, so as the root and fruit vegetables like white radish, carrot, tomatoes, hence these vegetables could be planted preferentially. In contrast, some kinds of vegetables, including white amaranth, red amaranth, tatsoi, broccoli, gy-nura, brassica juncea and lettuce of leafy vegetables, lactuca sativa, taro, red radish and cherry radish of rhizome vegetables and sweet pepper of fruit vegetables, had relatively high accumulation ability of heavy metal, which should be avoided to be planted in soils with mild and mid-dle-level heavy metal contamination.
出处
《农业资源与环境学报》
CAS
2015年第4期401-410,共10页
Journal of Agricultural Resources and Environment
基金
杭州市农业科研攻关项目(20120232B10)
浙江省新苗人才计划项目(2014R421036)
杭州师范大学大学生挑战杯项目(1284XXM32)
关键词
蔬菜
重金属
富集系数
vegetables
heavy metal
bioconcentration factor
