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《Modern Agricultural Science and Technology》 2017-23
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Effects of Cadmium on Growth and Mineral Nutrients Absorption of Purple Lettuce

LONG Jun-xia;CHEN Hui-qiong;CHEN Xiao-dong;School of Chemical and Environmental Engineering,College of Chemistry,Chemical Engineering and Materials Science,Soochow University;  
A hydroponic experiment was carried out to determine the effects of different cadmium does(0,1 mg/L,2 mg/L,4 mg/L) on growth,water and nutrition absorption of purple lettuce.Plants were grown in a phytotron where the light,temperature,relative humidity were controlled precisely.Each lettuce was grown in a unit pot with nutrient solution singly.The results showed that purple lettuce was sensitive to cadmium stress.As the cadmium concentration increased,there is a significant decrease in fresh weight,and the leaves are wilting.The lettuce can grow under low cadmium stress(1 mg/L),being restrained severely under high cadmium stress(2 mg/L,4 mg/L).Water consumption was significant decreased under high cadmium.Under low cadmium conditions,the effects on calcium and magnesium absorption were not significant,and potassium kalium absorption is not affected.The absorption of these three mineral nutrients was significant decreased under high cadmium.In 1 mg/L cadmium stress group,64.3% cadmium was absorbed by lettuce.In 2 mg/L and 4 mg/L cadmium stress group,the absorption of cadmium was 26.5% and 12.9% respectively.
【CateGory Index】: S636.2;X503.231
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