Table 3.

Mean of soil physico-chemical properties of the soil under three different rates of microplastics at day 30 of incubation times

Combinations	Cumulative CO2 g/cm2 soil	pH	OC	Ammonium-N (mg/kg)	Nitrate–N (mg/kg)
Combinations of microplastic PET and soil
A	8.1 ± 0.60	7.87 ± 0.06	0.67 ± 0.2	19.0 ± 1.7	56.0 ± 3.6
A1	7.6 ± 0.16	7.53 ± 0.06*	0.70 ± 0.0	36.7 ± 2.9*	85.3 ± 8.2*
A3	9.8 ± 0.43*	7.27 ± 0.06*	0.58 ± 0.1	39.3 ± 0.6*	93.7 ± 14*
A5	11.8 ± 0.5*	7.03 ± 0.15*	0.52 ± 0.1*	40.0 ± 3.5*	94.3 ± 16.7*
Combinations of microplastic PET, plant, and soil
B	–	7.93 ± 0.10	0.95 ± 0.0	10.7 ± 1.2	44.3 ± 2.9
B1	–	7.73 ± 0.00*	0.93 ± 0.2	35.0 ± 3.5*	81.3 ± 7.1*
B3	–	7.60 ± 0.06*	0.77 ± 0.1	39.7 ± 4.0*	81.3 ± 17.2*
B5	–	7.41 ± 0.03*	0.68 ± 0.1*	40.7 ± 1.2*	83.3 ± 5.7*

The letters in bold denote the tested combinations listed in Table 1. * refers to a meaningful variation (p < 0.05) in comparison to the control. The values shown are mean ± standard deviation values of three replicates