期 刊 :核农学报 2010年 24卷 4期 页码:856-862
关键词:叶菜 ;Cd处理 ;营养品质 ;灰度关联分析 ;
Keywords:green vegetable , Cd2+tolerance , nutrition quality , grey correlation ,
摘 要 :摘要:以5种叶菜为材料,采用水培和盆栽试验2种培养方式,测定不同浓度Cd2+处理下叶菜地上部(可食部分)生物量、Cd含量、硝酸盐及纤维素含量等生理与品质指标。结果表明:水培与盆栽培养条件下青菜、塌地乌、小白菜、菠菜及芥菜5种叶菜生物量随着Cd2+ 处理浓度增加显著降低(P<005);可食部Cd含量显著升高(P<005);高浓度水培与盆栽Cd2+处理(40mg·L-1和70mg·kg-1)下,5种叶菜中菠菜Cd含量相对较高,青菜Cd含量较低;随着Cd2+ 处理浓度增加,5种叶菜硝酸盐及纤维素含量升高,维生素C和可溶性糖含量下降,采用灰度关联综合分析表明,不同浓度Cd2+处理的5种叶菜中,青菜品质相对稳定及Cd含量较低,为Cd低积累品种。
Abstract:Abstract:Hydroponic and pot experiments were conducted to study the Cd absorption and accumulation, aerial part biomass,nitrate and fiber content, and other physiology or quality characteristics of five greenhouse vegetables: Chinese cabbage,Wutatsai,pakchoi,spinach and mustard. The results showed that the aerial part biomass of five green vegetables was declined (P< 005)and Cd absorption increased (P<005) with the increase of Cd concentration. The Cd accumulation in Chinese cabbage was the lowest and spinach was the highest under higher Cd2+ concentration treatment of 40mg·L-1 hydroponic culture and 70mg·kg-1pot culture. With the increase of Cd2+ concentration on pot experiment, nitrated and fiber content were increased, vitamin C and soluble sugar content were reduced,nitrate and fiber content were increased. The result of gray correlation analysis showed that Chinese cabbage was the low Cd accumulating and stable quality varieties among five green vegetables under different Cd2+ treatments.
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