Effects of Herbicides on the Microbial Community and Urease Activity in the Rhizosphere Soil of Maize at Maturity Stage
Table 3
Effects of herbicides on the alpha diversity of bacteria in the rhizosphere soil of maize.
Soil layer (cm)
Treatment
Shannon
ACE
Chao 1
Measured value
△CK (%)
Measured value
△CK (%)
Measured value
△CK (%)
0-20
CK
7.6
—
26109.7
—
15204.3
—
A0
7.6
0.9
30042.1
15.1
16573.7
9.0
A1
7.5
-1.2
20645.4
-20.9
13299.7
-12.5
A2
7.7
2.3
25091.6
-3.9
15564.7
2.4
A3
7.8
3.2
27539.3
5.5
16687.2
9.8
A4
7.5
-0.2
29388.9
12.6
16735.1
10.1
20-40
CK
7.6
—
31795.4
—
17283.6
—
A0
7.5
-1.6
21090.5
-33.7
12400.6
-28.3
A1
7.4
-3.1
24043.1
-24.4
14098.2
-18.4
A2
7.4
-2.3
30041.6
-5.5
16472.0
-4.7
A3
7.4
-2.4
18942.7
-40.4
11330.8
-34.4
A4
7.6
-0.3
33844.3
6.4
17851.1
3.3
40-60
CK
7.5
—
19817.4
—
12125.5
—
A0
7.8
4.1
30746.0
55.2
18073.9
49.1
A1
7.3
-3.2
21884.8
10.4
13089.6
8.0
A2
7.6
1.5
22149.7
11.8
13397.3
10.5
A3
7.5
0.5
25644.3
29.4
15070.1
24.3
A4
7.5
-0.3
29077.7
46.7
16219.4
33.8
Note: CK, the no herbicide negative control; A0, a preemergence nonspecific herbicide for maize, dinitraniline (the active control); A1-A4: four preemergence maize-specific herbicides, nicosulfuron+atrazine, alachlor+acetochlor+atrazine, propisochlor+atrazine, and acetochlor+atrazine, respectively.
