Effects of plastic film mulching and legume rotation on soil nutrients and microbial communities in the Loess Plateau of China

Chemical and Biological Technologies in Agriculture

Table 2 Effect of film mulching and crop rotation treatments on soil properties

Treatment	pH	EC (us/cm)	AN (mg/kg)	AP (mg/kg)	AK (mg/kg)	TC (g/kg)	TN (g/kg)
PC	7.72 ± 0.06a	391.25 ± 0.74b	13.22 ± 0.02c	11.32 ± 0.37d	166.94 ± 7.38d	14.11 ± 0.14d	0.89 ± 0.01c
PCF	7.60 ± 0.08a	403.08 ± 1.92a	14.34 ± 0.05c	12.30 ± 0.18c	177.28 ± 4.24 cd	14.73 ± 0.14c	0.93 ± 0.01c
R1	7.36 ± 0.06b	279.54 ± 0.45e	20.02 ± 0.57ab	12.44 ± 0.24c	227.87 ± 5.09a	15.11 ± 0.07c	0.98 ± 0.01b
R1F	7.16 ± 0.03c	278.04 ± 1.18e	21.53 ± 0.06a	15.25 ± 0.23a	232.80 ± 1.18a	16.04 ± 0.15a	1.08 ± 0.03a
R2	7.32 ± 0.02b	334.04 ± 0.27d	18.62 ± 0.92b	11.78 ± 0.13 cd	185.83 ± 3.46bc	15.06 ± 0.15c	1.03 ± 0.01ab
R2F	7.36 ± 0.04b	346.75 ± 0.10c	18.75 ± 0.75b	13.3 ± 0.13b	198.24 ± 3.30b	15.54 ± 0.05b	1.00 ± 0.02b

PC, potato continuous cropping without film mulching; PCF, potato continuous cropping with film mulching; R1, potato–broad bean rotation without film mulching; R1F, potato–broad bean rotation with film mulching; R2, potato–pea rotation without film mulching; R2F, potato–pea rotation with film mulching. Values are means of three replicates ± standard error (SE). Different lowercase letters within a column indicates a significant difference (Duncan’s test, p < 0.05)
AN alkaline nitrogen, AP available phosphorus, AK available potassium, TC total carbon, TN total nitrogen