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Applied Biological Chemistry

Table 1 Changes in the lettuce length and leaf number with time in the soils contaminated with cadmium (Cd), procymidone (PCM), polyvinyl chloride (PVC) microplastics, or low-density polyethylene (LDPE) microplastics after 25 d-growth period

From: Effect of co-presence of cadmium or procymidone with microplastic films in soil on lettuce growth

Soil samples

Lettuce length

Lettuce leaf number

Change rate* (cm d−1)

p-value

Change rate* (d−1)

p-value

Control soil

1.074

 < 0.0001

0.2828

0.0007

Cd-contaminated soil

0.986

0.0001

0.2481

0.0004

PCM-contaminated soil

0.633

0.0046

0.1629

0.0371

PVC-contaminated soil

0.960

0.0091

0.2562

0.0592

LDPE-contaminated soil

1.126

 < 0.0001

0.2459

0.0020

  1. *The change rates were estimated by linear regression of the lettuce length or the number of lettuce leaves after an initial stagnation period
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