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

Applied Biological Chemistry

Table 2 Changes in the lettuce length and leaf number with time in soils contaminated with cadmium (Cd) and microplastics or procymidone (PCM) and microplastics after 25 d-growth period

Soil samples	Lettuce length		Lettuce leave number
Soil samples	Change rate** (cm d⁻¹)	p-value	Change rate** (d⁻¹)	p-value
Cd-contaminated soil	0.9864	0.0001	0.2481	0.0004
Cd-contaminated soil with PVC	0.8781	0.0408	0.2676	0.1274
Cd-contaminated soil with LDPE	0.1244	0.5326	0.0467	0.7527
PCM-contaminated soil	0.6328	0.0046	0.1629	0.0371
PCM-contaminated soil with PVC	0.1469	0.1299	0.0760	0.5563
PCM-contaminated soil with LDPE	0.4785	0.0113	0.1319	0.2012

PVC polyvinyl chloride, LDPE low-density polyethylene
**The change rates were estimated by linear regression of the lettuce length or the number of lettuce leaves after an initial stagnation period