不同形态的肥料对菜心吸收镉的影响

本试验以盆栽方式，设置施不同形态的肥料共10个处理，以菜心为供试作物．测定土壤pH值、菜心产量、菜心植株的含镉量．试验结果表明：（1）10个处理对菜心的产量无显著影响；（2）土壤的pH值与植物的吸镉量呈负相关；土壤的pH值与所施肥料的形态有关，硝态氮肥可以减少植物的吸镉量，铵态氮肥也有一定的效果，硫酸铵则增加植物的吸镉量；磷肥、钾肥效果不显著，不同形态肥料之间的差异未达到显著水平；（3）有机复合肥对减少植物的吸镉量有一定的作用．

Effect of Different Forms of Fertilizers on Cadmium Uptake by Brassica Parachinensis

Pot culture experiment with ten treatments of fertilizers was designed to study the effect of different forms of fertilizers on cadmium uptake by Brassica parachinensis.Results show that, (1)there is no significant effect of the ten fertilizer treatments on the yield of Brassica parachinensis;(2)negative relationship exists between the soil pH value and plant uptake of cadmium; soil pH value is related to the forms of the applied fertilizers;nitric nitrogen fertilizer can decrease the plant uptake of cadmium and some ammonium nutrogen fertilizers also have the effect to some extent,but ammonium sulfate increases the cadmium uptake;phosphatic fertilizer and potassic fertilizer show no significant effect, and the differences in effects of different fertilizer forms do not reach the significant level; and (3), organic compound fertilizer can also decrease the cadmium uptake to a certain extent.