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针对石灰和农家肥对蕹菜中镉浓度的影响进行了一项试验。在沙壤土中种植蕹菜,通过掺入石灰(用L表示)和农家肥(用M表示)来控制1kg土壤中含5mg镉。分别添加4种浓度的石灰(5、10、15、20t·ha-1)、农家肥(5、10、15、20t·ha-1)以及二者混合(5+5、10+10、15+15、20+20t·ha-1)。随着土壤中石灰和农家肥含量的增加,蕹菜的各项生长参数得到显著提高。土壤中石灰的添加可以降低蕹菜茎叶和根系中重金属镉的浓度。试验结果表明,通过添加5～20t·ha-1比例的石灰可以降低在镉污染的土壤中种植的农作物对该元素的吸收。
An experiment was conducted on the effect of lime and peasant fertilizer on the cadmium concentration in water spinach. Bracken tubers are planted in sandy loam and 5 mg of cadmium in 1 kg of soil is controlled by the incorporation of lime (indicated by L) and manure (denoted by M). Four concentrations of lime (5,10,15,20 t · ha-1), farmyard manure (5,10,15,20 t · ha-1) and a mixture of the two (5 + 5,10 + 10,15 + 15,20 + 20t · ha-1). With the increase of lime and manure content in soil, the growth parameters of Brasenia schreberi have been significantly increased. The addition of lime to the soil can reduce the concentration of heavy metal cadmium in stems, leaves and roots of Brassica chinensis. The results showed that the absorption of this element by crops grown in the soil contaminated by cadmium could be reduced by adding 5 ~ 20t · ha-1 lime.