摘要
采用水培方法,研究了毒死蜱对两种叶菜类蔬菜菠菜和生菜生长的影响、在不同培养液中的降解速度以及在蔬菜中的吸收和转移规律。结果表明,低浓度毒死蜱(1.0和10.0mg·L-1)对两种供试蔬菜的生长没有明显影响,但高浓度毒死蜱(100.0mg·L-1)对两种蔬菜的生长均有一定的影响,而且生菜对毒死蜱较菠菜更为敏感。两种蔬菜均能明显促进毒死蜱在溶液中的降解,在不同溶液中的降解速度如下:菠菜-培养液>生菜-培养液>塘水>培养液。两种供试蔬菜对毒死蜱均有很强的吸收能力,而且具有相似的吸收规律。毒死蜱在菠菜根中达到最大吸收值所需的时间比生菜根所需的时间短,但在茎和叶中所需的时间两种蔬菜相同。
Using water-culture method, the effect of chlorpyrifos on the growth of leafy vegetables（spinach and romaine lettuce）, the degradation of chlorpyrifos in different culture solutions, and the uptake and translocation of chlorpyrifos in vegetables were studied. Our results showed that chlorpyrifos at low concentrations（1.0 and 10.0 mg·L^-1）had no significant inhibitory effects on the growth of vegetables. However, chlorpyrifos at a higher concentration（100.0 mg·L^-1）had significant inhibitory effects on the growth of vegetables and romaine lettuce appeared to be more sensitive to chlorpyrifos at this concentration than spinach. Both tested vegetables greatly accelerated degradation of chlorpyrifos in culture solutions. The degradation rates of chlorpyrifos in solutions were as follows：nutrition solution with spinach nutrition solution with romaine lettuce pond water nutrition solution. Both tested vegetables demonstrated strong uptake capabilities and similar uptake patterns. The time reaching chlorpyrifos maximum uptake by spinach root was shorter than that by romaine lettuce root, but that by stems and leaves of two cabbages was about the same.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2010年第3期426-430,共5页
Journal of Agro-Environment Science
基金
"十一五"国家科技支撑计划项目(2006BAD08A03)
关键词
叶菜类蔬菜
毒死蜱
毒性
吸收转移
leafy vegetable
chlorpyrifos
phytotoxicity
uptake and translocation
