Effects of Puddling Types and Rice Establishment Methods on Soil Characteristics and Productivity of Rice in Southern China
Table 5
Catalase, phosphatase, and urease activity as affected by puddling types and rice establishment methods (two years average).
Soil depth
Treatments
Catalase (0.1NKMnO4 (mL·g−1))
Phosphatase (P2O5 (mg·kg−1))
Urease (NH4+-N (mg·kg−1))
1H
2H
1H
2H
1H
2H
0–10 cm
PD
1.71a
1.76a
88.43a
95.12a
55.89a
56.63a
RD
1.58a
1.56b
82.91b
92.11b
54.45b
55.38a
PT
1.37b
1.46c
79.26c
90.56c
53.92b
54.64b
RT
1.34b
1.45c
77.68d
86.42d
51.46c
52.62c
10–20 cm
PD
1.88a
1.90a
74.44a
78.72a
47.51a
48.73a
RD
1.78a
1.85b
71.00b
73.15b
45.84a
46.64b
PT
1.58b
1.82b
66.88c
68.96c
44.94b
45.66b
RT
1.44c
1.72c
65.09c
67.55d
44.23b
44.72c
20–30 cm
PD
1.58a
1.48a
56.90a
64.72a
44.62a
45.17a
RD
1.46b
1.40a
54.02b
62.35b
43.91b
44.30a
PT
1.34c
1.30b
52.88c
59.62b
43.28b
43.85a
RT
1.29c
1.22c
50.99d
56.09c
42.56b
43.19a
PD: moldboard plowing with direct seeding, RD: rotary tiller with direct seeding, PT: moldboard plowing with mechanical transplanting, and RT: rotary tiller with mechanical transplanting. Different letters within a column represent significant differences at the 5% level of DMRT (1H: 1st harvest and 2H: 2nd harvest).
