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Effective Effects of Acrylamide/Carboxymethyl Cellulose/Biochar Composite Hydrogel on Cadmium Stress in Tobacco Seedlings

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图6 Cd胁迫15d烟苗的光合特性和SPAD值

Fig.6 Photosynthetic characteristics and SPAD values of tobacco seedlings under Cd stress for 15 days