干湿交替条件下磷镉交互作用在油菜上的生物学效应研究

Study on the Bio-Effect of Cadmium and Phosphorus Interaction on Oilseed Rape under Alternate Wetting and Drying Cycles Condition in an Artificial Contaminated Calcareous Soil

采用温室土培盆栽方法,研究了干湿交替条件下磷镉交互作用对油菜的生物学效应。结果表明,Cd处理间和P处理间以及磷镉交互处理之间油菜地上部生物量差异都是显著的,油菜根部生物量P处理间差异显著,而Cd处理间和磷镉交互之间无显著性差异。P促进了油菜地上部生物量的积累,而Cd却阻碍了油菜地上部生物量的积累。油菜地上部和根部生物量最大值出现在Cd0P100处理,最小值出现在Cd30P0处理。Cd处理间油菜地上部和根部Cd浓度差异是显著的,而P处理间和磷镉交互之间差异不明显。随着施Cd量的增加油菜吸收Cd的总量增加,高P处理的油菜吸收Cd的总量也随着施P量的增加而增加。P处理间油菜地上部和根部P浓度有显著性差异,Cd处理间和磷镉交互处理之间油菜地上部P浓度差异都不显著,而油菜根部P浓度在Cd处理间和磷镉交互之间差异都显著,各处理地上部P浓度总是小于对应处理的根部P浓度。

A pot culture experiment was carried out to study the bio-effect of cadmium （Cd）- phosphorus （P） interaction on oilseed rape under alternate wetting and drying cycles condition in greenhouse. The result showed that it were significant in shoot dry biomass production by plants of rape in Cd treatment, P treatment and the interaction of Cd and P treatment, and in root dry biomass production, it was also significant in P treatment, while other treatments were not. on rape, but cadmium blocked the shoot and root Phosphorus improved the shoot and root growth on rape. The maximum dry biomass production was present to the Cd0P100 treatment, while the least was Cd20P0 treatment. The uptake of total Cd content increased with P and Cd increase. The significant was found in P concentration in shoot and root of rape in P treatment, while it was not in Cd treatment and the interaction of Cd and P treatment. And the P and Cd concentration of the shoot of rape always lower than the root of the rape.